chore(release): 1.1.0

- playout: run-scoped R2 manifest URIs (candidate a rewrite via rewriteManifestToRun) - tests: playlist_rewrite_test.go (rewrite + publish integration + slate guard) - docs: STREAMING, cloudflare-workers-setup, architecture (incl. Level-2 diagram) - release housekeeping: TODO->DONE, CHANGELOG 1.1.0, version bump
feat(cloudflare): add linearvoid-media edge worker for R2 HLS delivery
2026-09-03 09:27:38 +02:00 · 2026-09-03 08:52:31 +02:00 · 2026-09-02 21:07:06 +02:00 · 2026-09-02 20:59:57 +02:00 · 2026-09-02 20:38:22 +02:00 · 2026-09-02 19:47:34 +02:00
139 changed files with 30948 additions and 5275 deletions
@@ -0,0 +1,55 @@
 # EditorConfig is awesome: https://editorconfig.org
 root = true
 # -------------------------------------------------
 # General settings – apply to all files
 # -------------------------------------------------
 [*]
 charset = utf-8
 end_of_line = lf
 insert_final_newline = true
 trim_trailing_whitespace = true
 # -------------------------------------------------
 # Markdown (*.md)
 # -------------------------------------------------
 [*.md]
 max_line_length = off        # Markdown lines can be long
 trim_trailing_whitespace = false   # Preserve intentional spaces
 # -------------------------------------------------
 # Go (*.go)
 # -------------------------------------------------
 [*.go]
 indent_style = tab
 indent_size = 4
 trim_trailing_whitespace = true
 max_line_length = 100
 # -------------------------------------------------
 # JavaScript & TypeScript (*.js, *.jsx, *.ts, *.tsx)
 # -------------------------------------------------
 [*.{js,jsx,ts,tsx}]
 indent_style = space
 indent_size = 2
 insert_final_newline = true
 trim_trailing_whitespace = true
 max_line_length = 120
 # -------------------------------------------------
 # HTML (*.html, *.htm)
 # -------------------------------------------------
 [*.{html,htm}]
 indent_style = space
 indent_size = 2
 max_line_length = 120
 trim_trailing_whitespace = true
 # -------------------------------------------------
 # CSS & SCSS (*.css, *.scss)
 # -------------------------------------------------
 [*.{css,scss}]
 indent_style = space
 indent_size = 2
 max_line_length = 120
 trim_trailing_whitespace = true
@@ -8,6 +8,8 @@ R2_SECRET_ACCESS_KEY=your-r2-secret-key
 R2_BUCKET_NAME=linearvoid-media
 R2_ENDPOINT=https://your-account-id.r2.cloudflarestorage.com
 R2_REGION=auto
 R2_KEEP_RUNS=2
 R2_MAX_RETENTION_BYTES=10737418240
 # Cloudflare (for custom domain, cache rules, Workers if used)
 CLOUDFLARE_API_TOKEN=your-cloudflare-api-token
@@ -47,14 +49,20 @@ DATABASE_URL=postgres://linearvoid:linearvoid@db:5432/linearvoid?sslmode=disable
 REDIS_URL=redis://redis:6379/0
 # Service Ports (for local docker-compose)
-PLAYOUT_PORT=8080
+# Coolify env: 80/443 (Traefik proxy), 8000 (dashboard/Portainer), 8080 taken.
 PLAYOUT_PORT=8081
 CHAT_PORT=3000
-NGINX_PORT=80
+NGINX_PORT=8082
 # Playout configuration
 PLAYLIST_PATH=/app/playlist/playlist.txt
-HLS_SEGMENT_DURATION=6
+HLS_SEGMENT_DURATION=2
-HLS_WINDOW_SIZE=24
+HLS_WINDOW_SIZE=12
 # Shared runtime config (written by chat admin via /api/admin/config, read by playout).
 # Both resolve to the same host file through the ./data/playlist volume.
 CONFIG_PATH=/app/playlist/config.json
 PLAYOUT_CONFIG_PATH=/app/playlist/config.json
 # Logging / Monitoring
 LOG_LEVEL=info
@@ -6,12 +6,14 @@
 name: CD
 on:
-  push:
+  workflow_run:
-    branches: [main]
+    workflows: [CI]
    types: [completed]
  workflow_dispatch:
 jobs:
  deploy:
    if: ${{ github.event_name == 'workflow_dispatch' || github.event.workflow_run.conclusion == 'success' }}
    runs-on: [ubuntu-latest]
    steps:
      - name: Checkout code
@@ -31,16 +33,44 @@ jobs:
      - name: Prepare environment
        run: |
          cat > .env << 'EOF'
          # Database & Redis
          DATABASE_URL="${{ secrets.DATABASE_URL }}"
          REDIS_URL=redis://redis:6379/0
          # Playout
          PLAYLIST_PATH=/app/playlist/playlist.txt
-          HLS_SEGMENT_DURATION=6
+          HLS_SEGMENT_DURATION=2
-          HLS_WINDOW_SIZE=24
+          HLS_WINDOW_SIZE=12
          LOG_LEVEL=info
          # Cloudflare R2 (required for HLS segment sync)
          R2_ACCESS_KEY_ID="${{ secrets.R2_ACCESS_KEY_ID }}"
          R2_SECRET_ACCESS_KEY="${{ secrets.R2_SECRET_ACCESS_KEY }}"
          R2_BUCKET_NAME="${{ secrets.R2_BUCKET_NAME }}"
          R2_ENDPOINT="${{ secrets.R2_ENDPOINT }}"
          R2_REGION=auto
          # Cloudflare
          CLOUDFLARE_API_TOKEN="${{ secrets.CLOUDFLARE_API_TOKEN }}"
          CLOUDFLARE_ACCOUNT_ID="${{ secrets.CLOUDFLARE_ACCOUNT_ID }}"
          MEDIA_DOMAIN=${{ secrets.MEDIA_DOMAIN }}
          # Frontend public URLs
          VITE_PUBLIC_APP_URL=${{ secrets.VITE_PUBLIC_APP_URL }}
          VITE_PUBLIC_WS_URL=${{ secrets.VITE_PUBLIC_WS_URL }}
          VITE_PUBLIC_HLS_URL=${{ secrets.VITE_PUBLIC_HLS_URL }}
          VITE_PUBLIC_ADMIN_DEFAULT_MODERATOR=${{ secrets.VITE_PUBLIC_ADMIN_DEFAULT_MODERATOR }}
          VITE_PUBLIC_ADMIN_DEFAULT_ROOM=${{ secrets.VITE_PUBLIC_ADMIN_DEFAULT_ROOM }}
          VITE_PUBLIC_ADMIN_MODERATION_LOG_LIMIT=50
          # Admin auth
          ADMIN_USERNAME="${{ secrets.ADMIN_USERNAME }}"
          ADMIN_PASSWORD="${{ secrets.ADMIN_PASSWORD }}"
          ADMIN_SESSION_TTL_HOURS=12
-          NGINX_PORT=80
+
          # Nginx
          # Host port 80/443 (Coolify Traefik) and 8080 are taken; nginx publishes on 8082.
          NGINX_PORT=8082
          EOF
      - name: Seed Prometheus config on remote host
@@ -48,7 +78,7 @@ jobs:
          DOCKER_HOST: tcp://192.168.88.40:2375
        run: |
          docker run --rm \
-            -v prometheus-config:/etc/prometheus \
+            -v linearvoid_prometheus-config:/etc/prometheus \
            alpine:latest sh -c '
              cat > /etc/prometheus/prometheus.yml << "PROMEOF"
          global:
@@ -113,6 +143,20 @@ jobs:
                    severity: warning
                  annotations:
                    summary: "Playout in slate fallback"
                - alert: HighChatLatency
                  expr: rate(linearvoid_chat_messages_total[5m]) < 0.01
                  for: 5m
                  labels:
                    severity: warning
                  annotations:
                    summary: "Unusually low chat message rate"
                - alert: PrometheusWALFailing
                  expr: increase(prometheus_tsdb_wal_writes_failed_total[5m]) > 0
                  for: 5m
                  labels:
                    severity: warning
                  annotations:
                    summary: "Prometheus WAL writes failing"
                - alert: HighCPU
                  expr: 100 - (avg by (instance) (rate(node_cpu_seconds_total{mode="idle"}[5m])) * 100) > 80
                  for: 10m
@@ -130,6 +174,66 @@ jobs:
          ALERTSEOF
            '
      - name: Seed Grafana provisioning on remote host
        env:
          DOCKER_HOST: tcp://192.168.88.40:2375
        run: |
          docker run --rm \
            -v linearvoid_grafana-provisioning:/etc/grafana/provisioning \
            alpine:latest sh -c '
              mkdir -p /etc/grafana/provisioning/datasources /etc/grafana/provisioning/dashboards
              cat > /etc/grafana/provisioning/datasources/datasource.yml << "DSEOF"
          apiVersion: 1
          datasources:
            - name: Prometheus
              type: prometheus
              access: proxy
              url: http://prometheus:9090
              isDefault: true
              editable: true
          DSEOF
              cat > /etc/grafana/provisioning/dashboards/dashboard.yml << "PROVEOF"
          apiVersion: 1
          providers:
            - name: "default"
              orgId: 1
              folder: ""
              type: file
              disableDeletion: false
              updateIntervalSeconds: 10
              allowUiUpdates: true
              options:
                path: /etc/grafana/provisioning/dashboards
          PROVEOF
              cat > /etc/grafana/provisioning/dashboards/linearvoid-app.json << "DBEOF"
          {
            "title": "Linear Void Monitoring",
            "panels": [
              {
                "title": "Concurrent Viewers",
                "type": "timeseries",
                "targets": [{ "expr": "linearvoid_chat_connected_clients" }]
              },
              {
                "title": "Stored Messages",
                "type": "stat",
                "targets": [{ "expr": "linearvoid_chat_messages_total" }]
              },
              {
                "title": "Redis Reachable",
                "type": "stat",
                "targets": [{ "expr": "linearvoid_chat_redis_up" }]
              },
              {
                "title": "Playout Mode",
                "type": "stat",
                "targets": [{ "expr": "linearvoid_playout_mode" }]
              }
            ]
          }
          DBEOF
            '
      - name: Deploy with docker-compose
        env:
          DOCKER_HOST: tcp://192.168.88.40:2375
@@ -142,7 +246,7 @@ jobs:
          DOCKER_HOST: tcp://192.168.88.40:2375
        run: |
          # Wait for services to stabilize
-          sleep 20
+          sleep 30
          # Check chat health (via docker exec — IP-agnostic, works on any DOCKER_HOST)
          echo "Checking chat health..."
@@ -167,8 +271,8 @@ jobs:
              echo "Playout is healthy"
              break
            fi
-            echo "Playout not ready yet (attempt $i/6), waiting 5s..."
+            echo "Playout not ready yet (attempt $i/6), waiting 20s..."
-            sleep 5
+            sleep 20
          done
          if ! docker exec linearvoid-playout curl -sf http://localhost:8081/health; then
            echo "Playout failed to become healthy after 6 attempts"
@@ -18,7 +18,7 @@ jobs:
      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
-          node-version: "20"
+          node-version: "22"
      - name: Install Frontend Dependencies
        run: cd frontend && npm ci
@@ -26,6 +26,9 @@ jobs:
      - name: Lint Frontend
        run: cd frontend && npm run lint
      - name: Test Frontend with Coverage
        run: cd frontend && npm run test:coverage
      - name: Build Frontend
        run: cd frontend && npm run build
@@ -43,7 +46,17 @@ jobs:
        run: cd backend/chat && GOTOOLCHAIN=local go vet ./...
      - name: Run Tests
-        run: echo "Tests will be added in future CI steps"
+        run: cd backend/chat && GOTOOLCHAIN=local go test ./... -v -cover -coverprofile=coverage.out -race
      - name: Check Coverage
        run: |
          cd backend/chat
          COVERAGE=$(GOTOOLCHAIN=local go tool cover -func=coverage.out | grep total | awk '{print $3}' | sed 's/%//')
          echo "Coverage: $COVERAGE%"
          if [ "$(echo "$COVERAGE < 50" | bc)" -eq 1 ]; then
            echo "Coverage $COVERAGE% below 50% threshold"
            exit 1
          fi
  docker:
    needs: test
@@ -0,0 +1,41 @@
 name: Deploy to Cloudflare Workers
 on:
  workflow_run:
    workflows: [CI]
    types: [completed]
  workflow_dispatch: {}
 jobs:
  deploy:
    if: ${{ github.event_name == 'workflow_dispatch' || github.event.workflow_run.conclusion == 'success' }}
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Setup Node
        uses: actions/setup-node@v4
        with:
          node-version: 22
      - name: Install dependencies
        run: cd frontend && npm ci
      - name: Build
        env:
          VITE_PUBLIC_APP_URL: ${{ secrets.VITE_PUBLIC_APP_URL }}
          VITE_PUBLIC_WS_URL: ${{ secrets.VITE_PUBLIC_WS_URL }}
          VITE_PUBLIC_HLS_URL: ${{ secrets.VITE_PUBLIC_HLS_URL }}
          VITE_PUBLIC_ADMIN_DEFAULT_MODERATOR: ${{ secrets.VITE_PUBLIC_ADMIN_DEFAULT_MODERATOR }}
          VITE_PUBLIC_ADMIN_DEFAULT_ROOM: ${{ secrets.VITE_PUBLIC_ADMIN_DEFAULT_ROOM }}
          VITE_PUBLIC_ADMIN_MODERATION_LOG_LIMIT: "50"
        run: cd frontend && npm run build
      - name: Deploy to Cloudflare Workers
        env:
          CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }}
          CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
        run: |
          cd frontend
          npx wrangler deploy
@@ -0,0 +1,35 @@
 name: Deploy Media Worker to Cloudflare
 on:
  workflow_run:
    workflows: [CI]
    types: [completed]
  workflow_dispatch: {}
 jobs:
  deploy:
    # Production deploy: only on pushes to main (via CI success) or manual main runs.
    if: ${{ (github.event_name == 'workflow_dispatch' && github.ref == 'refs/heads/main') || (github.event_name == 'workflow_run' && github.event.workflow_run.conclusion == 'success' && github.event.workflow_run.head_branch == 'main') }}
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Setup Node
        uses: actions/setup-node@v4
        with:
          node-version: 22
      - name: Install dependencies
        run: cd infrastructure/cloudflare && npm ci
      - name: Test worker
        run: cd infrastructure/cloudflare && npm test
      - name: Deploy to Cloudflare Workers (production)
        env:
          CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }}
          CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
        run: |
          cd infrastructure/cloudflare
          npx wrangler deploy --env production
@@ -2,10 +2,6 @@
 Agents instructions for the linearvoid project.
 ## Output
 - use /caveman skill, latest version from <https://github.com/JuliusBrussee/caveman> is <https://github.com/JuliusBrussee/caveman/tree/main/skills/caveman>
 ## General Guidelines
 - Use the architecture documentation (arc42 template and ADRs in `docs`) as the source of truth for design decisions.
@@ -14,9 +10,28 @@ Agents instructions for the linearvoid project.
 ## Task Management
- Plan any task in the `TODO.md` file with clear steps and mark them as completed when done. Move completed sections to DONE.md. Write entry in root `CHANGELOG.md` for any significant changes. Avoid using in-memory todo lists or update them frequently to sync from the `TODO.md` file.
+- Plan any task in the `.github/instructions/TODO.md` file with clear steps and mark them as completed when done. Move completed sections to `.github/instructions/DONE.md`. Write entry in root `CHANGELOG.md` for any significant changes. Avoid using in-memory todo lists or update them frequently to sync from the `TODO.md` file.
 - Before taking any action except for planning and writing `TODO.md`, always ask user for confirmation, accept `go`, `ok`, `yes`, `next`, or `continue` to proceed. If the user says `no`, `stop`, or `cancel`, abort the action and return to planning.
 ### Required tracking files — update at every development step
 These files must be kept current with every change. Do not let them drift.
 | File                              | Purpose                                       | When to update                                                     |
 | --------------------------------- | --------------------------------------------- | ------------------------------------------------------------------ |
 | `.github/instructions/TODO.md`    | Active implementation plan with checkboxes    | Mark items done as they complete; add new items when scope expands |
 | `.github/instructions/BACKLOG.md` | Deferred, manual, and operational tasks       | Sync whenever TODO items complete or new gaps are identified       |
 | `.github/instructions/DONE.md`    | Archive of completed TODO sections            | Move completed sections here from TODO.md                          |
 | `.github/MEMORY.md`               | Session memory — what was done, when, and why | Append dated entry after each meaningful batch of changes          |
 | `CHANGELOG.md`                    | User-facing release notes                     | Add entry when a phase or significant feature completes            |
 | `docs/STREAMING.md`               | Streaming pipeline contract                   | Update when playout, HLS, or caching behavior changes              |
 | `docs/DEPLOYMENT.md`              | Deploy and infrastructure procedures          | Update when pipeline, topology, or provisioning changes            |
 | `docs/SETUP.md`                   | Environment and onboarding guide              | Update when prerequisites, `.env`, or setup steps change           |
 | `docs/MONITORING.md`              | Observability reference                       | Update when metrics, alerts, or dashboards change                  |
 | `docs/API.md`                     | API contract                                  | Update when endpoints, status codes, or rate limits change         |
 | `docs/SECURITY.md`                | Security posture                              | Update when auth, TLS, or rate limiting changes                    |
 | `docs/operations/*.md`            | Runbooks, checklists, how-to guides           | Keep aligned with actual procedures and dashboard URLs             |
 ## Security & Secrets Protection
 - **Never commit raw secrets or credentials** to the repository.
@@ -0,0 +1,154 @@
 # MEMORY
 ## 2026-08-07
 - Completed runtime validation section from TODO.
 - Runtime video normalization tests executed in running `linearvoid-playout` container using ffmpeg/ffprobe.
 - Verified normalized outputs for MOV, MKV, VFR, and 5.1 inputs: `h264`, `yuv420p`, `30/1`, `aac`, `48000`, `2 channels`.
 - Concat continuity check passed with `CONCAT_OK`; output duration `25.344667` seconds.
 - Responsive viewport test on live viewer (`390x844`, `412x915`) detected 8px horizontal overflow from `100vw` usage in viewer container styles.
 - Fixed overflow in source by changing `.lv-body` and `.viewer-shell` width from `100vw` to `100%` in `frontend/src/style.css`.
 - Redis restart test:
  - Admin session endpoint returned 200 before and after Redis restart.
  - Presence key survived Redis restart in test-lab configuration.
  - Redis health returned to `healthy` post-restart.
 - Files changed:
  - `.github/instructions/TODO.md`
  - `.github/instructions/DONE.md`
  - `frontend/src/style.css`
  - `CHANGELOG.md`
 ## 2026-08-07 (continued)
 - Completed documentation half of recovery runbook TODO item.
 - Expanded `docs/incident-runbook.md` with quarterly DR drill: prerequisites, outage simulation, restore validation, pass/fail criteria, and evidence template.
 - Split TODO item into:
  - documented drill (`[x]`)
  - manual rehearsal execution (`[ ]`)
 - Updated `CHANGELOG.md` with incident runbook drill documentation entry.
 ## 2026-08-07 (continued 2)
 - Added manual operations checklist `docs/operations/cloudflare-uptimerobot-checklist.md` for Cloudflare + UptimeRobot task execution and evidence capture.
 - Linked checklist from `SETUP.md` Cloudflare section and TODO manual sections.
 - Did not mark manual dashboard items complete; checklist is preparation only.
 ## 2026-08-07 (continued 3)
 - Added `docs/operations/scaling-performance-playbook.md` covering manifest TTL tuning, TTFB baseline method, WebSocket/API benchmarking approach, cache ratio tracking, capacity triggers, and Phase 2/3 plans.
 - Updated TODO and BACKLOG to mark playbook creation done while keeping execution/measurement tasks pending.
 - Linked scaling playbook in `README.md` resources.
 ## 2026-08-09
 - Added WebSocket benchmark summary helper `scripts/loadtest/summarize-artillery.ps1`.
 - Updated `scripts/loadtest/run-loadtests.ps1` to auto-generate `ws-chat-summary.txt` for `ws` and `all` scenarios.
 - Updated `scripts/loadtest/summarize-k6.ps1` to produce pipeline-friendly output and integrated automatic `admin-api-endpoint-summary.txt` generation.
 - Expanded `scripts/loadtest/README.md` with PowerShell-first artifact capture and helper usage for both ws and admin scenarios.
 - Updated `.gitignore` to ignore loadtest artifacts (`artifacts/` and `scripts/loadtest/artifacts/`).
 - Added artifact-to-worksheet field mapping section in `docs/operations/scaling-performance-playbook.md` so ws/admin worksheet entries map directly to generated summary files.
 - Updated `docs/DEVELOPMENT.md` and `.github/instructions/TODO.md` to mark ws/admin benchmark scaffolding complete while live benchmark execution remains pending.
 - Added `CHANGELOG.md` entry `1.0.10` summarizing loadtest helper automation and playbook mapping updates.
 ## 2026-08-09 (continued)
 - Completed Phase 1 (test fixtures): documented ffmpeg fixture-generation commands in `playlist_test.go` header comments (valid_720p30, invalid_h265, invalid_24fps).
 - Completed Phase 4 (R2 integration):
  - Enhanced `SyncToR2` in `playlist.go` to set CacheControl + ContentType based on file extension:
    - `.m4s`, `.ts`, `.mp4`, `.m4a` -> `public, max-age=31536000, immutable` + `video/MP2T`
    - `.m3u8` -> `public, max-age=2` + `application/vnd.apple.mpegurl`
    - unknown extension -> no cache headers
  - Added three tests: `TestSyncToR2` (segment upload with cache verification), `TestSyncToR2_ManifestCacheHeaders` (manifest upload), `TestSyncToR2_NoCacheHeadersForUnknownExt` (unknown extension).
  - All 17 playout tests pass (16 pass, 1 pre-existing skip).
 - Updated TODO.md: Phase 1 marked complete, Phase 4 partially complete (edge cache hit/miss remains manual).
 - Updated DEVELOPMENT.md: Test Fixtures marked complete, R2 Integration Test marked partially complete.
 ## 2026-08-09 (continued 2)
 - Completed Phase 2 chat tests in `frontend/src/main.test.ts`:
  - Presence updates: join/leave system messages add and remove users from presence list, sorted rendering.
  - Private DM flow: togglePrivateDM creates correct dm: room name from sorted usernames.
  - Message rendering: system messages, self messages (message-self), and other-user messages (message-other) all render correctly.
  - Total frontend tests: 27 passing (2 test files).
 - Marked Phase 4 "Document stubs/mocks" done (putObject injection pattern).
 - Updated TODO.md: Phase 2 chat tests checked, Phase 4 stubs checked.
 - Updated DEVELOPMENT.md: User Frontend Tests marked partially complete, R2 stubs checked.
 - Updated CHANGELOG.md with Phase 2 presence/DM/message tests.
 ## 2026-08-09 (continued 3)
 - Completed Phase 3 admin frontend tests in `frontend/src/admin.test.ts`:
  - Exported `savePlaylist` and `renderPlaylistSortable` from `admin.ts`.
  - Added playlist save test (verifies PUT /api/admin/playlist with JSON body).
  - Added playlist save error handling test (verifies failure status).
  - Added sortable rendering test (verifies index, paths, remove buttons, comment/blank line skip).
  - Total frontend tests: 31 passing (2 test files).
 - Updated TODO.md: Phase 3 playlist/dashboard/API integration all checked.
 - Updated DEVELOPMENT.md: Admin Frontend Tests marked partially complete.
 ## 2026-08-10 (continued 2)
 - Implemented STREAMING.md production-readiness gaps from plan `.hermes/plans/2026-08-10_164500-production-readiness.md`:
  - **Task 1-2**: Added `runID` (ISO timestamp format) and monotonic `segSequence` for globally unique segment naming (`r-{ISOTIME}/seg-{seq}.m4s`). Replaced `strftime` pattern with run ID-based path.
  - **Task 2**: Added `watchAndPublishSegments` using `fsnotify` for real-time per-segment R2 upload (~7s delay). Previously `syncLatestToR2()` only ran after FFmpeg exit.
  - **Task 3**: Added `publishManifest` with atomic `CopyObject` (temp key → final key) to prevent manifest referencing unconfirmed segments.
  - **Task 4**: Updated `manifestCacheControl` from `"public, max-age=2"` to `"public, max-age=1, s-maxage=2, must-revalidate"` per STREAMING.md.
  - **Task 5**: Added `hls.on(Hls.Events.ERROR)` handler in `main.ts` with bounded retries (5x), exponential backoff (2s→32s), reconnecting overlay (spinner + text). Added `showReconnecting`/`hideReconnecting` functions.
  - **Task 6**: Enriched `HealthHandler` with `run_id`, `active_item`, `playlist_revision`, `last_segment_seq`, `last_r2_pub`, `consecutive_failures`. Added "unhealthy" status when R2 publish is stale (>12s).
 - Files changed: `backend/playout/src/playlist.go`, `playlist_test.go`, `go.mod`, `frontend/src/main.ts`, `main.test.ts`, `style.css`, `index.html`.
 - Updated `.github/instructions/TODO.md`, `BACKLOG.md`, `MEMORY.md`, `DONE.md`.
 - Remaining: CORS on media.linearvoid.tv (Cloudflare R2 config, infrastructure).
 ## 2026-08-10 (continued 3)
 - Completed Phase 2 (viewer) + Phase 3 (admin) responsive/accessibility tests:
  - 5 viewer accessibility tests: video controls/attributes, chat panel aria-labels, chat toggle aria-expanded, message input label, reconnecting overlay aria-live/role.
  - 3 viewer responsive tests: chat-collapsed toggle, CSS grid layout detection, now-playing aria-live.
  - 3 admin accessibility tests: nav aria-label, active tab aria-current, nav button focusability.
  - 2 admin responsive tests: tab content visibility, essential tab presence.
  - Total: 45 frontend tests passing (2 test files).
 - Added coverage reporting: `vitest.config.ts` with v8 provider, thresholds at 20/15/15/20 (statements/branches/functions/lines).
 - Added `test:coverage` script to `package.json`.
 - Fixed CI: bumped Node from 20 to 22 in `ci.yml` and `workers-deploy.yml` (jsdom@30 requires Node 22+). Added `engines` to `package.json`.
 - Updated AGENTS.md: added Required tracking files table with 13 docs and update cadence.
 - All Go vet, Go tests, frontend test:coverage passing.
 - CORS on media.linearvoid.tv remains the only streaming pipeline gap (Cloudflare R2 config, not code).
 ## 2026-08-10 (continued 4)
 - Verified all test suites pass after streaming pipeline implementation:
  - Playout: `go mod tidy` (added fsnotify v1.8.0) → all tests pass
  - Chat: 7 packages pass (go vet + go test)
  - Frontend: 45 tests pass (2 files), test:coverage meets thresholds (22.92% / 18.44% / 19.01% / 25.42%)
 - Edge cache validation script `scripts/validate-edge-cache.sh` exists.
 - Remaining: CORS on media.linearvoid.tv (Cloudflare R2 bucket CORS config, not a code change). Phases 5-7 are manual/infrastructure only (Cloudflare dashboard, Hetzner provisioning, live benchmarks).
 ## 2026-08-11
 - Consolidated all development tasks from `DEVELOPMENT.md` and `.github/instructions/TODO.md` into `.github/instructions/BACKLOG.md` as the single source of truth. `DEVELOPMENT.md` now obsolete and removed. `TODO.md` references `BACKLOG.md` and `DONE.md`.
 - Fixed R2 endpoint validation in playout service (`backend/playout/src/playlist.go`):
  - Added `isR2Configured()` checking all four required env vars (`R2_ENDPOINT`, `R2_ACCESS_KEY_ID`, `R2_SECRET_ACCESS_KEY`, `R2_BUCKET_NAME`).
  - `initR2Client()` now returns a clear error if R2 is not configured instead of creating an S3 client with an empty endpoint.
  - Segment watcher (`watchAndPublishSegments`), `syncLatestToR2()`, and `publishManifest()` are now guarded by `r2Client != nil` — no error spam when R2 is unavailable.
  - Playout gracefully degrades: local HLS via nginx works without R2.
 - Updated `.gitea/workflows/cd.yml` "Prepare environment" step to include all R2* variables sourced from Gitea secrets (`R2_ACCESS_KEY_ID`, `R2_SECRET_ACCESS_KEY`, `R2_BUCKET_NAME`, `R2_ENDPOINT`, `R2_ADMIN*\*`), Cloudflare variables (`CLOUDFLARE_API_TOKEN`, `CLOUDFLARE_ACCOUNT_ID`), and frontend public URL variables.
 - Updated `docs/DEPLOYMENT.md` "Environment File" section: replaced vague "Cloudflare/R2 variables" bullet with explicit variable lists and added a new "Gitea Secrets" table documenting all 15 required secrets.
 - All playout tests pass (20 tests), `go vet` clean.
 ## 2026-08-13
 - Completed all remaining enhancement tasks (only manual/infrastructure phases left):
  - **Playout**: automatic media normalization on upload (`media.NormalizeVideo`, `*.normalized.mp4`, statuses `ready`/`needs_normalization`/`normalizing`/`normalization_failed`, `POST /api/admin/media/{id}/normalize`); R2 segment retention (`cleanupOldRuns`, keep last `R2_KEEP_RUNS` runs, `R2_MAX_RETENTION_BYTES` cap); seamless looping (playlist SHA-256 fingerprint + `-start_number`); single `start-playout.sh` entrypoint + `-validate` mode; loop/cleanup metrics.
  - **Application configuration**: thread-safe JSON runtime config store (`backend/chat/src/config/runtime.go`) shared with playout via `/app/playlist/config.json`; `GET/PUT /api/admin/config`; admin UI config form.
  - **Matomo analytics**: public `GET /api/matomo` + viewer pageview snippet in `index.html`.
  - **Chat user accounts**: register/login/logout/session endpoints, bcrypt hashing, `linearvoid_user_session` cookie, viewer sign-in UI.
  - **DM history & search**: `GET /api/dm/history` (paginated) + `GET /api/dm/search` + DM search UI.
  - **Chat UI**: typing indicator, user-list toggle, media status badges, "Add to playlist" gated to `ready`.
  - **Prometheus TSDB retention**: `--storage.tsdb.retention.time=30d` + `--storage.tsdb.retention.size=15GB` in both compose files; alert rule count corrected 8 → 10.
 - Updated `docs/architecture/README.md` to reflect all `[Unreleased]` changes (normalization, looping, retention, runtime config, Matomo, user accounts, DM history/search, new API endpoints, module tables).
 - Released **1.0.13**: promoted changelog, bumped version, tagged and pushed.
 - Extended frontend test coverage: added `counter.test.ts`, reconnecting/typing/auth/websocket tests, admin failure + status-badge tests → 56 tests; statements 19.89% → 28.58% (CI coverage threshold passing).
 - Fixed Go test data race in `TestHandleAdminMediaByID_Normalize` (waits for async normalization goroutine) + shared in-memory SQLite via `SetMaxOpenConns(1)`.
 - Fixed viewer crash: `index.html` was missing the `#messages` chat container (stray `</section>`); restored structure + made `addMessage` defensive.
 - Set `Doto` as the body font (`--font-body`) and added Google Fonts links to admin + login pages.
 - Files changed: across `backend/chat`, `backend/playout`, `frontend`, `docs`, `docker-compose*.yml`, `.github/instructions/*`.
@@ -0,0 +1,136 @@
 # BACKLOG
 > All current work is planned in [TODO](./TODO.md) (2026-08-13). This file lists backlog items; new unplanned work is added here.
 ## Setup phases remaining
 ### Phase 5: complete manual Cloudflare and external-service setup
 - [ ] Apply Cloudflare Workers, Tiered Cache, WAF, rate limiting, and HTTPS/HSTS settings in the dashboard
 - [ ] Cloudflare Workers: link custom domain and cut over frontend hosting
 - [ ] Enable Smart Tiered Cache; validate `Cf-Cache-Status: HIT` from upper tier
 - [ ] WAF: enable OWASP Managed Ruleset (Simulate → review 48h → Block), enable Bot Fight Mode
 - [ ] Rate limiting: `/api/admin/login` + `/api/admin/*` → 10 req/10s per IP, Challenge action
 - [ ] HTTPS/WSS: Always Use HTTPS, HSTS max-age=31536000 includeSubDomains preload, min TLS 1.2; enforce at edge and origin
 - [ ] UptimeRobot: add HTTP monitor for `https://linearvoid.tv/health` (5min interval)
 - [ ] UptimeRobot: add keyword monitor for `https://linearvoid.tv/hls/playlist.m3u8` (keyword `#EXTM3U`, 5min)
 - [ ] UptimeRobot: alert on 2 consecutive failures via email + Discord/Slack webhook
 - [ ] Capture evidence in `docs/operations/cloudflare-uptimerobot-checklist.md`
 ### Phase 6: rehearse production deployment end to end
 - [ ] Provision Hetzner CX22 (2 vCPU, 4 GB, 40 GB) in Ashburn VA, Ubuntu 24.04
 - [ ] Install Docker Engine + Compose plugin; open firewall: 80/443 public, 2375 runner-only
 - [ ] Configure Docker daemon for remote TLS access (`-H tcp://0.0.0.0:2376` with certs)
 - [ ] Create `/srv/linearvoid/data/{playlist,media,hls,chat,slate}` directories
 - [ ] Add `CI_PROD_*` secrets to Gitea (DOCKER_HOST, R2 keys, admin password, DB password, Grafana password)
 - [ ] Trigger CD workflow with `DOCKER_HOST` pointing to Hetzner IP
 - [ ] Verify all 11 containers healthy: `/health`, `/hls/playlist.m3u8`, WebSocket
 - [ ] Update Cloudflare A record `linearvoid.tv` → Hetzner IP, SSL Full (strict); test HTTPS + WSS
 - [ ] Smoke test: viewer SPA loads, HLS plays, chat connects, admin login → upload → playlist → playout
 - [ ] Set up Prometheus alerting notifications + UptimeRobot on production URL
 - [ ] Run `scripts/backup-db.sh` + `scripts/verify-backups.sh` on production host
 - [ ] Document production IP, SSH access, rollback procedure, scaling thresholds
 ### Phase 7: baseline scaling and performance
 - [ ] Execute WebSocket load tests — ramp 10→100→500→1000 connections; measure p95 latency + errors
 - [ ] Execute admin API benchmarks — `wrk`/`k6` against `/api/admin/*`; target p95 <1s
 - [ ] Measure manifest TTFB and cache-hit distribution from multiple US regions (WebPageTest 3+ regions, <4s warm cache)
 - [ ] Tune manifest TTL to 0.5× segment duration; validate `Cf-Cache-Status` distribution
 - [ ] Track cache-hit ratio and R2 ops in production (Cloudflare GraphQL → Grafana panel, alert <90%)
 - [ ] Capacity triggers: Prometheus rules for cache-miss >10%/15min, CPU >80%/10min
 - [ ] Plan Phase 2 service separation (playout CPU, chat latency, DB state, monitoring)
 - [ ] Plan Phase 3 multi-origin resilience (second Hetzner location, warm standby, DNS failover, DB/Redis replication)
 ### Phase 8: close out remaining test and validation gaps
 - [ ] Admin frontend: user moderation tools tests (mute/ban/report, view moderation logs)
 - [ ] Frontend: coverage for all critical user + admin components and interactions
 - [ ] Frontend: document test cases and expected outcomes
 - [ ] Backend R2: test retrieval of segments/manifests via Cloudflare edge
 - [ ] Backend R2: validate edge cache hit/miss behavior with repeat requests (`scripts/validate-edge-cache.sh`)
 ### Playout
 - [ ] Configure an R2 lifecycle rule on the `hls/` prefix as defense-in-depth (manual)
 - [ ] Full-loop E2E (2-file playlist, assert `Looping...` with no `CRASHED` across the boundary) — manual via `scripts/test-playout-e2e.sh`
 ## Cloudflare Configuration
 ### DNS & Workers
 - [ ] Cloudflare Workers: link custom domain (manual)
 - [ ] Create Cloudflare Worker and cut over frontend hosting (manual)
 ### Security & TLS
 - [ ] Enable Tiered Cache, WAF, rate limiting (manual)
 - [ ] Tiered Cache: enable Smart Tiered Cache, validate `Cf-Cache-Status: HIT` from upper tier
 - [ ] WAF: enable OWASP Managed Ruleset, set to Simulate → review 48h → Block, enable Bot Fight Mode
 - [ ] Rate limiting: `/api/admin/login` + `/api/admin/*` → 10 req/10s per IP, Challenge action
 - [ ] HTTPS/WSS: Always Use HTTPS, HSTS max-age=31536000 includeSubDomains preload, min TLS 1.2
 - [ ] HTTPS/WSS: enforce at edge (Cloudflare) and origin (nginx), redirect HTTP → HTTPS
 ## Monitoring & Observability
 ### External Monitoring
 - [ ] Set up UptimeRobot external monitoring
 - [ ] UptimeRobot: add HTTP monitor for `https://linearvoid.tv/health` (5min interval)
 - [ ] UptimeRobot: add keyword monitor for `https://linearvoid.tv/hls/playlist.m3u8` (keyword: `#EXTM3U`, 5min)
 - [ ] Alert on 2 consecutive failures, notify via email + Discord/Slack webhook
 ## External Services
 > Evidence tracker: `docs/operations/cloudflare-uptimerobot-checklist.md`
 - [ ] UptimeRobot: add HTTP monitor for `https://linearvoid.tv/health` (5min interval)
 - [ ] UptimeRobot: add keyword monitor for `https://linearvoid.tv/hls/playlist.m3u8` (keyword: `#EXTM3U`, 5min)
 - [ ] Alert on 2 consecutive failures, notify via email + Discord/Slack webhook
 ## Production Deployment
 ### Host Provisioning (Hetzner — not provisioned)
 - [ ] Provision Hetzner CX22 (2 vCPU, 4 GB, 40 GB) in Ashburn VA, Ubuntu 24.04
 - [ ] Install Docker Engine + Compose plugin, open firewall: 80/443 (public), 2375 (runner IP only)
 - [ ] Configure Docker daemon for remote TLS access (`-H tcp://0.0.0.0:2376` with certs)
 - [ ] Create `/srv/linearvoid/data/{playlist,media,hls,chat,slate}` directories
 ### CI/CD & Secrets
 - [ ] Add `CI_PROD_*` secrets to Gitea: DOCKER_HOST, R2 keys, admin password, DB password, Grafana password
 - [ ] Trigger CD workflow with `DOCKER_HOST` pointing to Hetzner IP
 ### Smoke Test & Cutover
 - [ ] Verify all 11 containers start healthy, check `/health`, `/hls/playlist.m3u8`, WebSocket
 - [ ] Update Cloudflare A record `linearvoid.tv` → Hetzner IP, SSL Full (strict), test HTTPS + WSS
 - [ ] Smoke test: viewer SPA loads, HLS plays, chat connects, admin login → upload → playlist → playout
 ### Production Operations
 - [ ] Set up Prometheus alerting notifications + UptimeRobot on production URL
 - [ ] Run `scripts/backup-db.sh` + `scripts/verify-backups.sh` on production host
 - [ ] Document production IP, SSH access, rollback procedure, scaling thresholds
 ## Scaling & Performance
 ### Load Testing
 - [ ] Execute WebSocket load tests with real infrastructure — ramp 10→100→500→1000 connections, measure p95 latency + errors
 - [ ] Execute admin API benchmarks with real infrastructure — `wrk`/`k6` against `/api/admin/*`, target p95 <1s
 ### Cache & TTFB Optimization
 - [ ] Optimize segment immutability and manifest TTL for cache efficiency
 - [ ] Tune manifest TTL: measure `Cf-Cache-Status` distribution, adjust to 0.5× segment duration
 - [ ] Measure playback TTFB from multiple US regions — WebPageTest from 3+ regions, target <4s warm cache
 - [ ] Track cache hit ratio and R2 ops in production — Cloudflare GraphQL → Grafana panel, alert <90%
 ### Capacity & Future Planning
 - [ ] Capacity triggers: Prometheus rules for cache-miss >10%/15min, CPU >80%/10min
 - [ ] Plan Phase 2 service separation — document boundaries (playout CPU, chat latency, DB state, monitoring), estimate per-service resources
 - [ ] Plan Phase 3 multi-origin resilience — research second Hetzner location, design warm standby + DNS failover + DB/Redis replication
@@ -0,0 +1,78 @@
 # DONE
 > Completed tasks from [TODO](./TODO.md). Product, feature, and release history lives in [CHANGELOG](./CHANGELOG.md); this file keeps only engineering and ops notes not captured there.
 ## Manifest run-scoped rewrite — candidate (a) (2026-09-03)
 - Playout now publishes the live R2 manifest with run-scoped media URIs. `rewriteManifestToRun` in `backend/playout/src/playlist.go` prefixes each bare relative URI (`seg-*.m4s` / `init.mp4`, plus `#EXT-X-MAP:URI`) with `r-{runID}/` before `publishManifest`'s atomic `.tmp` → `CopyObject` commit; skipped in slate mode. Added a stubbable `copyObject` hook for tests (consistent with `putObject`/`listObjects`/`deleteObjects`).
 - Tests: `playlist_rewrite_test.go` — `TestRewriteManifestToRun`, `TestRewriteManifestToRun_AlreadyPrefixedUnchanged`, `TestRewriteManifestToRun_HandlesTSAndComments`, `TestRewriteManifestToRun_EmptyRunID`, `TestIsMediaURI`, `TestPublishManifest_RewritesToRunScopedURIs`, `TestPublishManifest_SlateNotRewritten`.
 - Docs updated: `STREAMING.md`, `operations/cloudflare-workers-setup.md`, `architecture/README.md` (incl. Level-2 diagram showing the R2-bound `linearvoid-media` Worker and run-scoped layout).
 - **Still pending (in TODO): live Validation** — deploy the updated playout to the test lab and confirm manifest/segment URIs resolve via `media.linearvoid.tv`.
 ## Test infrastructure & refactors (2026-08-07)
 - Chat service `main.go` split into 8 packages (config, auth, db, handlers, ws, media, ratelimit, metrics); `db.RedisClient` + `db.PubSub` interfaces added for mocking.
 - 78 tests total (Go + frontend), all passing. Coverage: auth 97.8%, config 100%, metrics 100%, ratelimit 90.3%, ws 79.6%, handlers 47.2%, media 36.8%, db 14.3%.
 - Playout: 12 tests. Frontend: vitest + jsdom, 6 user + 5 admin smoke tests.
 - CI: `go test -race -cover` with a 50% coverage threshold; SQLite switched to pure-Go `github.com/glebarez/sqlite` (CGO-free, works on Windows).
 - Frontend coverage enforcement: vitest v8 provider, 40% statements/lines + 30% branches/functions thresholds, `test:coverage` script + CI step.
 ## Backups
 - `scripts/backup-db.sh` (daily pg_dump → R2, 14-day retention), `scripts/backup-weekly.sh` (weekly full dump + integrity check, 8-week retention), `scripts/verify-backups.sh` (download → temp Postgres → restore + row counts).
 ## Gitea self-hosting migration
 - Migrated repo + CI/CD from GitHub to Gitea Actions (`git.allucanget.biz/zwitschi/linearvoid`): self-hosted runner, Container Registry convention `git.allucanget.biz/zwitschi/linearvoid/<service>:<tag>`, secrets renamed `GITEA_*` → `CI_*`.
 ## Streaming pipeline gaps (2026-08-10)
 - Continuous R2 sync via `fsnotify` (`watchAndPublishSegments`, ~7s delay); run-ID + monotonic segment naming (`r-{ISOTIME}/seg-{seq}.m4s`); atomic manifest publication (upload `.tmp` → `CopyObject`); enriched `/health` (run_id, active_item, playlist_revision, last_segment_seq, last_r2_pub, consecutive_failures); player error recovery (5 retries, 2s→32s exponential backoff, reconnecting overlay).
 - CORS on `media.linearvoid.tv` remains infrastructure-only (Cloudflare R2 config, not code).
 ## Bug fixes not in CHANGELOG
 - **2026-08-13 viewer crash**: `index.html` was missing the `#messages` container, so `addMessage` threw `Cannot read properties of null (reading 'appendChild')` on WebSocket open/message. Restored the chat panel structure and made `addMessage` defensive.
 - **2026-08-15 chat reconnect loop**: after a registered user logged in, the chat panel repeatedly filled with old messages. `connectWebSocket` left the replaced socket's `onclose` handler attached, so each intentional reconnect scheduled another reconnect and every connection re-pulled the room's 50-message history on a 3s loop. Fixed by detaching the old socket's `onclose` before closing and guarding the handler against stale sockets. Regression test added; `npm --prefix frontend test` → 58 tests passing.
 ## Chat improvements
 - Manual smoke: viewer join/leave shows a 3s flash (not a chat row); reconnect <5s shows no duplicate; admin chat-log table has no system rows
 ## Playout improvements
 - Test in Firefox: live playback, rebuffer/recovery, chat sync; record quirks in `docs/STREAMING.md`
 - Rebuild + run playout; confirm `playlist.m3u8` lists ~12 segments at 2s each
 - Manual: verify viewer latency and cache-hit behavior after the change
 ## Chat sidebar (2026-08-17)
 - [x] remove search bar from chat sidebar (not needed for single-room)
 - [x] remove "user" toggle button from chat sidebar (hide for now, add back when user interface is stable)
 - [x] make login/registration form a modal and only toggle it when user is not logged in and clicks "Login" or "Register"
 - [x] when user is logged in, do not show login/registration form
 - [x] make sure each message is only rendered once in the chat log (no duplicates on reconnect or initial load)
 ### Plan
 Files: `frontend/index.html`, `frontend/src/main.ts`, `frontend/src/style.css`.
 1. **Remove search bar** (single-room)
   - `index.html`: delete the `<div id="dm-search-row">` block.
   - `main.ts`: remove `searchDM()` and the `dm-search-btn` listener; drop the `#dm-search-row` show/hide logic in `switchRoom()` (the `searchRow.hidden = !isDM` lines). Keep `currentDMTarget` only if the "New DM" flow stays.
 2. **Remove "Users" toggle button**
   - `index.html`: delete the `<button id="users-toggle-btn">` button.
   - `main.ts`: remove `toggleUserList()` and the `users-toggle-btn` listener; drop the now-unused `usersVisible` variable.
 3. **Login/registration form as a modal**
   - `index.html`: wrap the `#auth-panel` form in a modal structure (`.auth-modal` + backdrop) with a close button.
   - `style.css`: add `.auth-modal` / `.auth-modal-backdrop` styles.
   - `main.ts`: add `openAuthModal()` / `closeAuthModal()`; change the `auth-toggle-btn` handler to open the modal (only when not authenticated) instead of toggling `#auth-panel` inline; wire a close/backdrop-click to `closeAuthModal()`.
 4. **Hide form when logged in**
   - `main.ts` `updateAuthUI()`: when `authenticated` → hide the "Sign in" button and call `closeAuthModal()`; show the user label + "Sign out" button. When not authenticated → show "Sign in" and hide "Sign out".
 5. **No duplicate messages**
   - `main.ts`: add `clearMessages()` (empties `#messages`) and call it at the top of `connectWebSocket()` so each (re)connect renders history fresh instead of appending.
   - Fix the initial double-connect: make the initial `connectWebSocket("main")` wait for `refreshUserSession()` (or connect once with the resolved username) so history isn't pushed twice on load.
@@ -0,0 +1,39 @@
 # TODO
 > Completed tasks moved to [DONE](./DONE.md). Remaining tasks in [BACKLOG](./BACKLOG.md).
 ## Playout / R2 manifest–segment layout mismatch
 **Chosen approach: candidate (a)** — rewrite the live manifest so its media URIs point into the current run-scoped folder before the atomic R2 publish. Go change in `backend/playout/src/playlist.go`. The `linearvoid-media` Worker stays a faithful path→R2 mapper (no serve-time rewrite).
 ### Remaining — Validation
 - [ ] Run playout (local or test lab), then:
  - `curl https://media.linearvoid.tv/hls/playlist.m3u8` → 200, short TTL.
  - Every URI in the manifest resolves `200` with `Cache-Control: public, max-age=31536000, immutable` (via the `linearvoid-media` Worker).
  - Confirm manifest refresh + `CF-Cache-Status` progression and no 404 on segment fetch across a run loop.
 - [ ] Verify slate fallback still serves correctly after the rewrite change.
 > Implementation (candidate a), Go unit tests, and documentation are complete — see [DONE.md](./DONE.md).
 ## Frontend Tests
 ### User Frontend
 - [ ] Test coverage for all critical frontend components and interactions
 - [ ] Add code coverage reporting and enforce minimum coverage threshold in CI/CD pipeline
 - [ ] Document test cases and expected outcomes
 ### Admin Frontend
 - [ ] Test coverage for all critical admin UI components and interactions
 - [ ] Add code coverage reporting and enforce minimum coverage threshold in CI/CD pipeline
 - [ ] Document test cases and expected outcomes
 ## Backend Integration Tests
 ### Cloudflare R2
 - [ ] Test retrieval of segments and manifests from R2 via Cloudflare edge
 - [ ] Validate cache hit/miss behavior and performance metrics
 - [ ] Validate edge cache hit/miss behavior with repeat requests — script `scripts/validate-edge-cache.sh` created
@@ -7,6 +7,10 @@
 .env.local
 .env.*.local
 # Test coverage
 coverage
 coverage.out
 # Logs
 logs
 *.log
@@ -15,6 +19,10 @@ yarn-debug.log*
 yarn-error.log*
 pnpm-debug.log*
 # Benchmark artifacts
 artifacts/
 scripts/loadtest/artifacts/
 # Runtime data
 pids
 *.pid
@@ -41,6 +49,7 @@ out/
 # FFmpeg temporary files
 *.ts.tmp
 *.m3u8.tmp
 *.m4s.tmp
 hls/
 temp/
@@ -78,11 +87,6 @@ Thumbs.db
 *.tfstate.backup
 .terraform/
 # Agent / Tool files
 .github/instructions/TODO.md
 .github/instructions/DONE.md
 .github/instructions/BACKLOG.md
 # (keep AGENTS.md, MEMORY.md, and other instruction files)
 # Temporary architecture artifacts
 **/*.tmp
@@ -0,0 +1,95 @@
 # =============================================
 # Linear Void .prettierignore
 # =============================================
 # Dependencies
 node_modules/
 # Build outputs
 dist/
 build/
 out/
 *.min.js
 # Test coverage
 coverage/
 coverage.out
 # Go source (handled by gofmt, not prettier)
 *.go
 go.mod
 go.sum
 # Binary / compiled
 *.exe
 *.dll
 *.so
 *.dylib
 # Media files
 *.m4s
 *.m3u8
 *.ts.tmp        # FFmpeg temp, not TypeScript
 *.m3u8.tmp
 *.png
 *.jpg
 *.jpeg
 *.gif
 *.svg
 *.ico
 *.webp
 *.mp4
 *.webm
 *.mp3
 *.ogg
 # Runtime data
 data/
 pids
 *.pid
 *.seed
 *.pid.lock
 # Databases
 *.db
 *.sqlite
 *.sqlite3
 # Lockfile (auto-generated, don't reformat)
 package-lock.json
 # Shell scripts (prettier doesn't handle sh)
 *.sh
 # Environment & secrets
 .env
 .env.*
 !.env.example
 # Logs
 *.log
 # Editor & IDE
 .vscode/
 .idea/
 *.swp
 *.swo
 # OS files
 .DS_Store
 Thumbs.db
 # Git
 .git/
 # Terraform / IaC
 *.tfstate
 *.tfstate.backup
 .terraform/
 # Temp & backup files
 **/*.tmp
 **/*.bak
 # Docker
 .dockerignore
@@ -0,0 +1,7 @@
 {
  "tabWidth": 2,
  "useTabs": false,
  "printWidth": 120,
  "endOfLine": "lf",
  "proseWrap": "preserve"
 }
@@ -1,307 +0,0 @@
 # API Reference
 This document describes the currently implemented API surfaces in Linear Void.
 ## Base URLs
 - Public app and admin: <https://linearvoid.tv>
 - WebSocket endpoint: <wss://linearvoid.tv/ws>
 - Local fallback: <http://localhost> and <ws://localhost/ws>
 ## Authentication Model
 Admin REST endpoints use a cookie session.
 - Cookie name: linearvoid_admin_session
 - Cookie attributes: HttpOnly, SameSite=Strict, Secure when request is HTTPS (or X-Forwarded-Proto=https)
 - Session TTL: controlled by ADMIN_SESSION_TTL_HOURS (default 12h)
 ## Chat WebSocket API
 ### Connect
 Endpoint:
 - GET /ws?username={name}&room={room}
 Client sends JSON messages over the socket.
 ### Message Envelope (client -> server)
 ```json
 {
  "room": "main",
  "username": "viewer123",
  "text": "hello world",
  "type": "public"
 }
 ```
 Notes:
 - type is usually public for room chat and private for DM room routing.
 - Private room names are formatted like dm:userA-userB (sorted usernames).
 - Moderation/system events are sent as type=system messages.
 ### Message Envelope (server -> client)
 ```json
 {
  "room": "main",
  "username": "viewer123",
  "text": "hello world",
  "type": "public",
  "timestamp": "2026-08-04T12:34:56Z"
 }
 ```
 ## Admin Session API
 ### Login
 - POST /api/admin/login
 - Auth: none
 Request:
 ```json
 {
  "username": "admin",
  "password": "your-password"
 }
 ```
 Success response:
 ```json
 {
  "authenticated": true,
  "username": "admin"
 }
 ```
 ### Logout
 - POST /api/admin/logout
 - Auth: optional (clears cookie either way)
 Response:
 ```json
 {
  "authenticated": false
 }
 ```
 ### Session Check
 - GET /api/admin/session
 - Auth: cookie required
 Success response:
 ```json
 {
  "authenticated": true,
  "username": "admin"
 }
 ```
 Failure:
 - 401 unauthorized
 ## Admin Data API
 All endpoints below require admin authentication.
 ### Overview
 - GET /api/admin/overview
 Returns aggregate counters and runtime/system snapshot fields.
 ### Playlist
 - GET /api/admin/playlist
 - PUT /api/admin/playlist
 PUT request:
 ```json
 {
  "content": "file '/app/media/video1.mp4'\nfile '/app/media/video2.mp4'\n"
 }
 ```
 ### Schedule
 - GET /api/admin/schedule
 Returns parsed playlist entries plus matched media metadata/runtime.
 ### Moderation
 - GET /api/admin/moderation/logs?limit=50
 - POST /api/admin/moderation/actions
 Action request:
 ```json
 {
  "action": "mute",
  "target": "username-or-id",
  "moderator": "admin",
  "reason": "spam",
  "room": "main"
 }
 ```
 ### Analytics
 - GET /api/admin/analytics
 Returns totals (messages, moderation actions, rooms) and top room summary.
 ### System
 - GET /api/admin/system
 Returns service health snapshot for chat/playout/redis/database and config metadata.
 ### Active Users
 - GET /api/admin/users
 Returns currently discovered presence users (room + username) when Redis is available.
 ## Media Library API
 ### Media Collection
 - GET /api/admin/media
 - POST /api/admin/media (multipart upload, legacy path)
 Multipart form field name: file
 ### Media Item
 - GET /api/admin/media/{id}
 - PUT /api/admin/media/{id}
 - DELETE /api/admin/media/{id}
 PUT request:
 ```json
 {
  "status": "ready",
  "title": "My Clip",
  "tags": "music,live"
 }
 ```
 ## Resumable Upload API
 Maximum file size: 2GB
 Default chunk size: 8MB
 ### Initialize or Resume Session
 - POST /api/admin/media/uploads
 Request:
 ```json
 {
  "uploadId": "optional-existing-id",
  "fileName": "clip.mp4",
  "fileSize": 123456789,
  "mimeType": "video/mp4",
  "chunkSize": 8388608,
  "totalChunks": 15
 }
 ```
 Response:
 ```json
 {
  "uploadId": "hex-token",
  "fileName": "clip.mp4",
  "fileSize": 123456789,
  "chunkSize": 8388608,
  "totalChunks": 15,
  "uploadedChunks": 3,
  "progress": 20
 }
 ```
 ### Check Upload Status
 - GET /api/admin/media/uploads/{uploadId}
 Returns same status envelope as initialize.
 ### Upload Chunk
 - PUT /api/admin/media/uploads/{uploadId}/chunk?index={chunkIndex}
 - Content-Type: application/octet-stream
 Response returns updated upload status envelope.
 ### Complete Upload
 - POST /api/admin/media/uploads/{uploadId}/complete
 On success returns admin media listing payload (files + generatedAt).
 ## Metrics and Health
 ### Chat metrics
 - GET /metrics
 Prometheus exposition includes connected clients, stored messages, moderation actions, Redis indicators, active admin sessions, and build info.
 ### Health
 - GET /health on chat service
 - GET /health on playout service
 - GET /health on nginx reverse proxy
 ## HTTP Status Conventions
 | Code | Meaning               | When                                                        |
 | ---- | --------------------- | ----------------------------------------------------------- |
 | 200  | OK                    | Successful GET, PUT, or action                              |
 | 201  | Created               | Successful POST (upload init, override created)             |
 | 204  | No Content            | Successful DELETE, CORS preflight                           |
 | 400  | Bad Request           | Malformed JSON, missing required fields, invalid input      |
 | 401  | Unauthorized          | Missing or expired admin session                            |
 | 403  | Forbidden             | Valid session but insufficient permissions                  |
 | 404  | Not Found             | Resource doesn't exist                                      |
 | 405  | Method Not Allowed    | Wrong HTTP method for endpoint                              |
 | 409  | Conflict              | Schedule override overlap, upload ID mismatch               |
 | 413  | Payload Too Large     | Upload exceeds 2 GB limit                                   |
 | 422  | Unprocessable         | File fails normalization check (codec, fps, resolution)     |
 | 429  | Too Many Requests     | Rate limit exceeded (chat messages, WS connections, login)  |
 | 500  | Internal Server Error | Unexpected server failure                                   |
 | 503  | Service Unavailable   | Redis unavailable for user actions, playout health degraded |
 ## Rate Limiting
 All limits are per-IP (from `X-Forwarded-For` or `RemoteAddr`) unless noted.
 | Resource              | Limit                              | Window                                   | Response                                               |
 | --------------------- | ---------------------------------- | ---------------------------------------- | ------------------------------------------------------ |
 | Chat messages         | `CHAT_RATE_LIMIT_MAX` (default 10) | `CHAT_RATE_LIMIT_WINDOW_S` (default 10s) | 429 + `{"type":"system","text":"Rate limit exceeded"}` |
 | WebSocket connections | 5                                  | 60s                                      | 429 + `"too many connections from this IP"`            |
 | Admin login           | 5                                  | 5min                                     | 429 + `"too many login attempts, try again later"`     |
 Rate limit headers on applicable responses:
 - `X-RateLimit-Limit`: maximum requests per window
 - `Retry-After`: seconds until window resets
 - 413: payload too large
 - 500: internal server error
@@ -2,6 +2,113 @@
 <!-- markdownlint-disable MD024 -->
 ## [1.1.0] - 2026-09-03
 ### Added
 - **Cloudflare media edge worker (`linearvoid-media`)**: new self-contained project under `infrastructure/cloudflare/` — an R2-bound Worker owning `media.linearvoid.tv` that enforces immutable segment caching (`public, max-age=31536000, immutable`) and short-TTL live `.m3u8`, with HLS CORS/OPTIONS, byte-Range, and a `/health` probe. Includes Vitest unit tests + Miniflare/workerd R2 integration tests and production deploy via `.gitea/workflows/workers-media-deploy.yml`. Replaces the ad-hoc `worker.js`.
 - **Bash script ports**: Linux/macOS equivalents of the Windows ops/load-test scripts (`cache-hit-ratio`, `check-env`, `check-tokens`, loadtest run/summarize); `.ps1` files retained.
 - **Transient presence flash**: join/leave events show as a 3-second `#chat-flash` instead of permanent chat rows.
 ### Changed
 - **Cloudflare Workers hosting**: frontend moved from Cloudflare Pages to the `linearvoid-frontend` static-assets Worker; docs now describe `linearvoid-frontend` (SPA) and `linearvoid-media` (edge HLS), correcting stale `worker.js` and R2 custom-domain wording.
 - **Docs de-Windows'd & condensed**: bash-first guides for `SETUP`, `DEPLOYMENT`, `API`, `MONITORING`, `STREAMING`, `COOLIFY`, incident runbook, scaling playbook, architecture README, and Prometheus metrics inventory.
 - **Compose port de-collision**: playout on host port `8081`, nginx moved to `8082` (`NGINX_PORT` default updated) to avoid Coolify-reserved ports.
 - **Playout**: R2 retention now by run count + byte cap (`R2_KEEP_RUNS` default 2, `R2_MAX_RETENTION_BYTES` default 10 GiB, new gauges) replacing the 24h time-based cleanup; default `HLS_SEGMENT_DURATION` 2s / `HLS_WINDOW_SIZE` 12; deduplicated, concurrent startup validation.
 - **Chat/UX**: 5s reconnect grace window (no join/leave spam); `system` messages no longer persisted; smaller `.message-text`; sidebar cleanup (removed DM search + Users toggle, login/register now a modal).
 - **Auth**: viewer session cookie uses `SameSite=None; Secure` over HTTPS (cross-site SPA) and `Lax` over plain HTTP.
 ### Fixed
 - **Run-scoped R2 manifest URIs (playout)**: `publishManifest` now rewrites bare relative media URIs to the current run folder (`r-{runID}/…`) via `rewriteManifestToRun` before the atomic `.tmp` → `CopyObject` publish, so the live `hls/playlist.m3u8` references resolve against the run-scoped segment keys on `media.linearvoid.tv`. Skipped in slate mode. (Live validation pending — see `TODO.md`.)
 - **Cross-origin auth**: login/register API calls now prefix `VITE_PUBLIC_APP_URL` so the Workers-served SPA reaches the app origin.
 - **Duplicate chat history**: `connectWebSocket` clears messages on each (re)connect and the initial connect waits for session resolution.
 ### Tests
 - WebSocket (`TestHub_Broadcast_SystemNotPersisted`, `TestHub_ReconnectGracePeriod`), handlers (`TestHandleAdminChatLog_ExcludesSystem`), frontend presence flash.
 - Playout: `TestCleanupOldRuns(_SizeCap)`, `TestR2KeepRuns`, `TestR2MaxRetentionBytes`, `TestR2RunFromKey`, `TestValidateWorkersConfig`, `TestValidatePlaylist_Dedup`.
 - Playout (run-scoped manifest rewrite): `TestRewriteManifestToRun`, `TestRewriteManifestToRun_AlreadyPrefixedUnchanged`, `TestRewriteManifestToRun_HandlesTSAndComments`, `TestRewriteManifestToRun_EmptyRunID`, `TestIsMediaURI`, `TestPublishManifest_RewritesToRunScopedURIs`, `TestPublishManifest_SlateNotRewritten`.
 - Cloudflare media worker: Vitest unit (`cacheControlForPath`, `contentTypeForPath`, `parseByteRange`) + Miniflare R2 integration (immutable segment, short-TTL manifest, Range `206`, `404`, OPTIONS, method guard).
 ## [1.0.13] - 2026-08-13
 ### Added
 - **Automatic media normalization on upload**: Chat backend auto-transcodes non-conforming uploads. New `media.NormalizeVideo` wraps ffmpeg with the Linear Void profile (H.264/AAC, 30fps, 2s keyframes, yuv420p, 48kHz stereo), re-verifies output with ffprobe, and writes `*.normalized.mp4`. Media records gain `normalizing` / `normalization_failed` statuses; `POST /api/admin/media/{id}/normalize` re-triggers manually. Admin UI shows a "Normalize" action with status polling.
 - **R2 segment retention**: Playout `cleanupOldSegments` deletes `hls/r-*/*` objects older than `R2_SEGMENT_RETENTION_HOURS` (default 24h), run hourly + at startup, never touching the live manifest. Exposes `linearvoid_playout_r2_cleanup_objects_total` metric. `.env.example` adds `R2_SEGMENT_RETENTION_HOURS`.
 - **Playout loop metrics**: `linearvoid_playout_loops_total` (clean completions) and `linearvoid_playout_run_duration_seconds` (last run duration).
 - **Runtime configuration store**: Thread-safe, JSON-persisted runtime config (`HLS_SEGMENT_DURATION`, `HLS_WINDOW_SIZE`, `MATOMO_URL`, `MATOMO_SITE_ID`) with typed getters/setters + validation, editable via `GET/PUT /api/admin/config`. Playout reads the shared `config.json` as env fallback.
 - **Matomo analytics**: Viewer pageview snippet in `index.html` driven by the public `GET /api/matomo` endpoint.
 - **Chat user accounts**: Register/login/logout (`POST /api/auth/register`, `/login`, `/logout`, `GET /api/auth/session`), bcrypt password hashing, `linearvoid_user_session` cookie, and a viewer sign-in UI.
 - **Private DM history & search**: `GET /api/dm/history` (paginated) and `GET /api/dm/search`, with a DM search UI in the viewer.
 - **Chat UI polish**: Typing indicator, user-list toggle, media status badges, and an "Add to playlist" action gated to `ready` media.
 ### Changed
 - **Playout seamless looping**: `main()` now only resets HLS output when the playlist changed (SHA-256 `playlistRevision`), on crash/slate recovery, or first run; otherwise it continues segment numbering via `-start_number` and prunes stale segments. Eliminates the viewer gap on clean playlist loops.
 - **Single playout entrypoint**: `start-playout.sh` now runs `/app/playlist-manager -validate` then `exec`s the Go binary, removing the duplicate shell ffmpeg loop. Added a `-validate` mode to `main()`.
 - **Admin media library**: Shows status badges (`ready`/`needs_normalization`/`normalizing`/`failed`) and only offers "Add to playlist" for `ready` media; playlist entries show per-item status badges.
 - **Prometheus TSDB retention**: The `prometheus` service now sets `--storage.tsdb.retention.time=30d` and `--storage.tsdb.retention.size=15GB` (in both `docker-compose.yml` and `docker-compose.prod.yml`), so metrics older than 30 days are deleted.
 ### Tests
 - Media: `TestNormalizationArgs`, `TestNormalizeVideo_FFmpegError`.
 - Handlers: `TestNormalizeMediaRecord_Success`, `TestNormalizeMediaRecord_Failure`, `TestHandleAdminMediaByID_Normalize`.
 - Playout: `TestCleanupOldSegments`, `TestR2SegmentRetentionHours`, `TestPlaylistFingerprint`, `TestHLSNextStartNumber`, `TestLoadSharedHLSConfig`.
 - Config: `runtime_test.go` (get/set, persist/reload, env fallback, validation).
 - Auth: `TestUserSessionStore`.
 - Handlers: config GET/PUT + validation, DM history/search, user register/login/session.
 ## [1.0.12] - 2026-08-11
 ### Changed
 - **Task tracking consolidated**: Removed `DEVELOPMENT.md` and moved all development tasks to `.github/instructions/BACKLOG.md` as the single source of truth. `TODO.md` updated to reference `BACKLOG.md` and `DONE.md`.
 ### Fixed
 - **Playout R2 endpoint validation**: `initR2Client()` now validates all required R2 environment variables (`R2_ENDPOINT`, `R2_ACCESS_KEY_ID`, `R2_SECRET_ACCESS_KEY`, `R2_BUCKET_NAME`) before creating the S3 client. Previously, an empty `R2_ENDPOINT` caused cryptic `Custom endpoint '' was not a valid URI` errors on every segment upload attempt. Playout now gracefully degrades when R2 is not configured — local HLS via nginx continues to work.
 - **CD workflow missing R2 secrets**: `.gitea/workflows/cd.yml` "Prepare environment" step now injects all R2\_ variables (`R2_ACCESS_KEY_ID`, `R2_SECRET_ACCESS_KEY`, `R2_BUCKET_NAME`, `R2_ENDPOINT`, plus admin variants) from Gitea secrets. Previously the generated `.env` was missing R2 entirely, causing the playout container to start with an empty endpoint.
 - **Deployment docs**: `docs/DEPLOYMENT.md` now includes explicit R2 and Cloudflare variable lists plus a "Gitea Secrets" table documenting all 15 required secrets.
 ## [1.0.11] - 2026-08-10
 ### Added
 - **Phase 1 test fixtures**: Media and playlist test fixtures in `backend/playout/testdata/` with ffmpeg generation commands documented in test headers.
 - **Phase 4 R2 integration**: `SyncToR2` now sets `CacheControl` + `ContentType` based on file extension (immutable segments, short-lived manifests). Three integration tests added.
 - **Phase 2 viewer tests**: Presence updates (join/leave/sorted), private DM flow, message rendering (system/self/other) in `main.test.ts` (27 total tests).
 - **Phase 3 admin tests**: Playlist management (save via PUT, error handling, sortable rendering) in `admin.test.ts` (31 total tests passing).
 ### Changed
 - Exported `savePlaylist` and `renderPlaylistSortable` from `admin.ts` for testing.
 ## [1.0.10] - 2026-08-09
 ### Added
 - **WebSocket summary helper**: Added `scripts/loadtest/summarize-artillery.ps1` to extract counters, rates, and available percentile stats from Artillery JSON output.
 - **Playbook worksheet mapping**: Added artifact-to-worksheet mapping section in `docs/operations/scaling-performance-playbook.md` for WebSocket and Admin API benchmark artifacts.
 - **Test fixture generation docs**: Added ffmpeg commands for generating valid and invalid media fixtures as comments in `backend/playout/src/playlist_test.go`. Phase 1 test fixtures now complete.
 - **R2 cache header support**: `SyncToR2` now sets `CacheControl` and `ContentType` based on file extension:
  - `.m4s`/`.ts`/`.mp4`/`.m4a` → immutable (max-age=31536000)
  - `.m3u8` → short-lived (max-age=2s)
  - unknown → no cache headers
 - **R2 integration tests**: Added `TestSyncToR2_ManifestCacheHeaders` and `TestSyncToR2_NoCacheHeadersForUnknownExt` verifying cache header behavior for segment, manifest, and unknown file types.
 ### Changed
 - **Loadtest runner**: `scripts/loadtest/run-loadtests.ps1` now generates `ws-chat-summary.txt` automatically for `ws` and `all` scenarios.
 - **Loadtest docs**: `scripts/loadtest/README.md` now documents `summarize-artillery.ps1` usage and the new `ws-chat-summary.txt` artifact.
 - **Planning status wording**: Updated `docs/DEVELOPMENT.md` and `.github/instructions/TODO.md` to mark ws/admin benchmark scaffolding complete while benchmark execution remains pending.
 - **Phase 1 complete**: Test fixture creation and ffmpeg documentation marked done.
 - **Phase 4 partially complete**: R2 upload + cache header validation done; edge cache hit/miss validation remains manual.
 - **Phase 2 frontend tests**: Added presence updates (join/leave rendering), private DM flow, and message rendering tests in `main.test.ts` (27 total tests passing).
 - **Phase 3 admin frontend tests**: Added playlist management tests (save via PUT, error handling, sortable rendering) in `admin.test.ts` (31 total tests passing).
 ## [1.0.9] - 2026-08-06
 ### Added
@@ -16,10 +123,15 @@
 - **CI pipeline**: Removed redundant `release` job (handled by `release.yml`).
 - **Tag format**: Standardized on `*.*.*` (e.g. `1.0.9`), removed `v` prefix from existing tags.
 - **DEPLOYMENT.md**: Documented parallel CI/CD pipeline flow with workflow table.
 - **Runtime checks**: Executed normalization edge-case tests (MOV, MKV, VFR, 5.1 input) and concat continuity verification in running playout environment.
 - **Incident runbook**: Added quarterly disaster recovery drill procedure with prerequisites, outage simulation, restore validation, and evidence template.
 - **Manual ops checklist**: Added `docs/operations/cloudflare-uptimerobot-checklist.md` to execute and record Cloudflare + UptimeRobot dashboard tasks with evidence capture.
 - **Scaling playbook**: Added `docs/operations/scaling-performance-playbook.md` with benchmark methods, trigger thresholds, and Phase 2/3 scaling decision flow.
 ### Fixed
 - **Prometheus config mount**: Switched prod from bind mounts to named volume `prometheus-config`, populated via `docker run` on remote host. Fixes `not a directory` error when bind source path doesn't exist on deployment host.
 - **Viewer mobile overflow**: Replaced `100vw` with `100%` on full-screen viewer containers to remove horizontal overflow on mobile viewports.
 ### Removed
@@ -1,284 +0,0 @@
 # Deployment Guide
 ## Table of Contents
 - [Deployment Guide](#deployment-guide)
  - [Table of Contents](#table-of-contents)
  - [Environments](#environments)
  - [Production Target (Hetzner)](#production-target-hetzner)
    - [Planned Infrastructure](#planned-infrastructure)
    - [Cutover Plan](#cutover-plan)
    - [Firewall / Security Group](#firewall--security-group)
    - [Pipeline Readiness](#pipeline-readiness)
  - [Target Topology](#target-topology)
  - [Prerequisites](#prerequisites)
  - [Environment File](#environment-file)
  - [Pull-and-Run Deployment](#pull-and-run-deployment)
  - [First-Time or Recovery Provisioning](#first-time-or-recovery-provisioning)
  - [Health Verification](#health-verification)
  - [Zero/Low-Downtime Update Pattern](#zerolow-downtime-update-pattern)
  - [Rollback](#rollback)
  - [Operational Tasks](#operational-tasks)
    - [View logs](#view-logs)
    - [Restart one service](#restart-one-service)
    - [Stop stack](#stop-stack)
    - [Keep volumes (recommended) vs remove volumes (destructive)](#keep-volumes-recommended-vs-remove-volumes-destructive)
  - [Nginx and Proxy Considerations](#nginx-and-proxy-considerations)
  - [Security Baseline](#security-baseline)
  - [Common Deployment Pitfalls](#common-deployment-pitfalls)
  - [Troubleshooting](#troubleshooting)
 ## Environments
 Linear Void runs in two separate environments:
 | Environment    | Host                       | Docker Target              | Purpose                                        |
 | -------------- | -------------------------- | -------------------------- | ---------------------------------------------- |
 | **Test Lab**   | `192.168.88.40` (internal) | `tcp://192.168.88.40:2375` | Integration testing, staging, CI/CD validation |
 | **Production** | Hetzner VPS (TBD)          | `tcp://<hetzner-ip>:2375`  | Public linearvoid.tv serving real viewers      |
 **Current state (2026-08-06):** Test lab is active and receives automated CD deploys. Production Hetzner VPS is **not yet provisioned**. The CD workflow (`cd.yml`) and `docker-compose.prod.yml` currently target the test lab. Switching to production requires only changing `DOCKER_HOST` — see [Production Deployment](#production-target-hetzner) below.
 ## Production Target (Hetzner)
 **Status: Not provisioned.** The production deployment plan is documented and the pipeline is ready — only the VPS needs to be created.
 ### Planned Infrastructure
 | Resource       | Spec                                             |
 | -------------- | ------------------------------------------------ |
 | Provider       | Hetzner Cloud                                    |
 | Region         | Ashburn, VA (us-east)                            |
 | Instance       | CX22 (2 vCPU, 4 GB RAM, 40 GB SSD) or equivalent |
 | OS             | Ubuntu 24.04 LTS or Debian 12                    |
 | Bandwidth      | 20 TB included traffic/month                     |
 | Estimated cost | ~€7–10/month base                                |
 ### Cutover Plan
 1. Provision Hetzner VPS (see [Production Deployment](#production-target-hetzner) section)
 2. Add production secrets to Gitea (`CI_PROD_*` prefix)
 3. Update `DOCKER_HOST` in CD workflow to Hetzner public IP
 4. Trigger deploy → validate health checks
 5. Update Cloudflare A record `linearvoid.tv` → Hetzner IP
 6. Enable HTTPS, WAF, cache rules on production zone
 7. Decommission test lab as public target
 ### Firewall / Security Group
 | Port | Source                | Purpose                        |
 | ---- | --------------------- | ------------------------------ |
 | 22   | Admin IPs             | SSH management                 |
 | 80   | 0.0.0.0/0             | HTTP (redirect to HTTPS)       |
 | 443  | 0.0.0.0/0             | HTTPS (nginx)                  |
 | 2375 | Gitea runner IP only  | Docker remote API (TLS)        |
 | 9090 | Admin IPs or internal | Prometheus (or tunnel via SSH) |
 | 3001 | Admin IPs or internal | Grafana (or tunnel via SSH)    |
 ### Pipeline Readiness
 Three Gitea Actions workflows drive the full pipeline:
 | Workflow      | Trigger          | Purpose                                                                                  |
 | ------------- | ---------------- | ---------------------------------------------------------------------------------------- |
 | `ci.yml`      | Push to `main`   | Lint, build frontend, vet Go, build & push Docker images (`:latest`, `:main`)            |
 | `cd.yml`      | Push to `main`   | Deploy to test lab (`192.168.88.40:2375`) — runs **in parallel** with CI                 |
 | `release.yml` | Tag push `*.*.*` | Build & push versioned Docker images (`:X.Y.Z`, `:X.Y`, `:latest`), create Gitea Release |
 CI and CD run simultaneously on every push to `main`. The deploy pulls whatever `:latest` images are available in the registry at that moment.
 The CD workflow (`cd.yml`) uses `DOCKER_HOST` to target the deployment host. To switch targets:
 ```bash
 # Test lab (current)
 DOCKER_HOST=tcp://192.168.88.40:2375
 # Production (when provisioned)
 DOCKER_HOST=tcp://<hetzner-public-ip>:2375
 ```
 No code changes needed in the pipeline. See `DEPLOYMENT.md` Production Deployment section for full checklist.
 ## Target Topology
 - Host: Linux server with Docker Engine
 - Reverse proxy: nginx container (linearvoid-nginx)
 - Core services: playout, chat, redis, postgres
 - Observability: prometheus, grafana
 - CDN/edge: Cloudflare
 ## Prerequisites
 - Docker Engine + Docker Compose plugin
 - Network access to git.allucanget.biz
 - A valid .env file with production values
 - DNS configured for linearvoid.tv (and media.linearvoid.tv if split media domain is used)
 ## Environment File
 Use .env with at least:
 - CI_REGISTRY_URL
 - CI_REGISTRY_NAMESPACE
 - CHAT_PORT
 - NGINX_PORT
 - DATABASE_URL (if overridden)
 - REDIS_URL (if overridden)
 - ADMIN_USERNAME
 - ADMIN_PASSWORD
 - VITE_PUBLIC_APP_URL
 - VITE_PUBLIC_WS_URL
 - VITE_PUBLIC_HLS_URL
 - Cloudflare/R2 variables when media sync is enabled
 See .env.example and SETUP.md for full variable reference.
 ## Pull-and-Run Deployment
 Images are built and pushed automatically by the CI and release workflows (see [CONTRIBUTING.md](CONTRIBUTING.md#versioning-and-releases) for the release procedure).
 Every push to `main` triggers CI (builds `:main` and `:latest` tags) and CD (deploys `:latest` to test lab) in parallel. Semantic version tags (`*.*.*`, e.g. `1.0.9`) trigger the release workflow which builds `:X.Y.Z`, `:X.Y`, and `:latest` tags and creates a Gitea Release.
 From repository root:
 ```bash
 docker login git.allucanget.biz
 docker compose -f docker-compose.prod.yml pull
 docker compose -f docker-compose.prod.yml up -d --remove-orphans
 ```
 ## First-Time or Recovery Provisioning
 1. Ensure host paths exist:
 ```bash
 mkdir -p data/chat data/playlist data/media data/hls
 ```
 1. Confirm volumes and networks:
 ```bash
 docker volume ls
 docker network ls
 ```
 1. Start stack:
 ```bash
 docker compose -f docker-compose.prod.yml up -d
 ```
 ## Health Verification
 After startup, check service status:
 ```bash
 docker compose -f docker-compose.prod.yml ps
 ```
 Endpoint checks:
 - App: <http://{host}:8080/>
 - Nginx health: <http://{host}:8080/health>
 - Chat health: <http://{host}:3000/health>
 - Playout health: <http://{host}:8081/health>
 - Prometheus: <http://{host}:9090>
 - Grafana: <http://{host}:3001>
 Domain checks:
 - <https://linearvoid.tv>
 - <https://linearvoid.tv/admin>
 - <https://linearvoid.tv/metrics>
 ## Zero/Low-Downtime Update Pattern
 1. Pull newest images.
 1. Recreate changed services only:
 ```bash
 docker compose -f docker-compose.prod.yml pull
 docker compose -f docker-compose.prod.yml up -d nginx chat playout
 ```
 1. Re-run health checks.
 ## Rollback
 If new images are unhealthy:
 1. Pin previous tags in docker-compose.prod.yml.
 2. Pull pinned tags.
 3. Restart impacted services.
 ```bash
 docker compose -f docker-compose.prod.yml pull
 docker compose -f docker-compose.prod.yml up -d nginx chat playout
 ```
 ## Operational Tasks
 ### View logs
 ```bash
 docker compose -f docker-compose.prod.yml logs -f nginx chat playout
 ```
 ### Restart one service
 ```bash
 docker compose -f docker-compose.prod.yml restart chat
 ```
 ### Stop stack
 ```bash
 docker compose -f docker-compose.prod.yml down
 ```
 ### Keep volumes (recommended) vs remove volumes (destructive)
 ```bash
 # keep data
 docker compose -f docker-compose.prod.yml down
 # destructive (remove data)
 docker compose -f docker-compose.prod.yml down -v
 ```
 ## Nginx and Proxy Considerations
 - If an external proxy (for example Nginx Proxy Manager) fronts the stack, align request body limits with internal nginx.
 - For resumable admin uploads, ensure client_max_body_size supports chunk requests in both proxy layers.
 ## Security Baseline
 - Use strong ADMIN_PASSWORD and rotate regularly.
 - Keep Docker host access restricted.
 - Prefer HTTPS/WSS through Cloudflare.
 - Restrict exposed ports if only proxy access is needed.
 ## Common Deployment Pitfalls
 - Missing frontend build artifacts in local-only compose workflows.
 - Wrong registry credentials or missing login.
 - Misaligned domain env vars (app/ws/hls) causing mixed-origin errors.
 ## Troubleshooting
 | Symptom                    | Check                                         | Fix                                                           |
 | -------------------------- | --------------------------------------------- | ------------------------------------------------------------- |
 | Service not starting       | `docker logs linearvoid-<svc> --tail 50`      | Check `.env` vars, volume mounts, port conflicts              |
 | Playout stall / slate mode | `curl http://<host>:8081/health` — mode=slate | Check playlist file, media paths, disk space                  |
 | Chat not connecting        | `curl http://<host>:3000/health`              | Check Redis: `docker exec linearvoid-redis redis-cli ping`    |
 | Admin 401 loop             | Cookie not sent                               | Verify `X-Forwarded-Proto: https`, nginx auth_request headers |
 | Upload fails (413)         | File too large                                | Check nginx `client_max_body_size` (should be 64m+)           |
 | HLS not playing            | `curl http://<host>/hls/playlist.m3u8`        | Check playout health, HLS dir permissions                     |
 | Prometheus no targets      | `curl http://<host>:9090/targets`             | Verify container network, scrape config                       |
 | Grafana no data            | Check datasource                              | Verify Prometheus URL `http://prometheus:9090` provisioned    |
 - Proxy-layer body size limits returning 413 on upload.
 - Health checks failing before service warmup is complete.
@@ -0,0 +1,7 @@
 Copyright © 2026 linearvoid.tv (Corey Pellizzi, Georg Sinn)
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
@@ -5,9 +5,9 @@
 **Repository**: [git.allucanget.biz/zwitschi/linearvoid](https://git.allucanget.biz/zwitschi/linearvoid)
 [![Build Status](https://git.allucanget.biz/zwitschi/linearvoid/actions/workflows/ci.yml/badge.svg)](https://git.allucanget.biz/zwitschi/linearvoid/actions)
 [![License](https://img.shields.io/badge/License-MIT-blue.svg)](LICENSE)
 [![Gitea](https://img.shields.io/badge/Gitea-1.27.1-blue)](https://git.allucanget.biz)
-[![Version](https://img.shields.io/badge/version-1.0.9-blue)](https://git.allucanget.biz/zwitschi/linearvoid/releases)
+[![License](https://img.shields.io/badge/License-MIT-blue.svg)](LICENSE)
 [![Version](https://img.shields.io/badge/version-1.1.0-blue)](https://git.allucanget.biz/zwitschi/linearvoid/releases)
 [![Release Notes](https://img.shields.io/badge/release-notes-green)](CHANGELOG.md)
 ## Architecture
@@ -15,7 +15,7 @@
 The architecture (detailed in [`docs/architecture/README.md`](docs/architecture/README.md)) uses:
 - Hetzner Ashburn VPS for playout (FFmpeg + MediaMTX/SRS) and chat _(planned production; currently test lab at 192.168.88.40)_.
- Cloudflare R2 + CDN with aggressive immutable caching of HLS `.ts` segments ($0 egress).
+- Cloudflare R2 + CDN with aggressive immutable caching of `.m4s` segments ($0 egress).
 - Lightweight static frontend and WebSocket chat backend.
 - Gitea self-hosted CI/CD (Actions) and Container Registry.
@@ -46,69 +46,180 @@ flowchart TD
    P -->|sync| R2
 ```
 A detailed description of the Streaming architecture, playout, and delivery is available in [`docs/STREAMING.md`](docs/STREAMING.md).
 ## Project Structure
 This structure directly reflects the building blocks, runtime flows, deployment view, and cross-cutting concepts defined in the arc42 documentation.
 ```text
 linearvoid/
-├── frontend/                  # Static Single-Page Application (HTML/CSS/JS)
+├── docs/                   # see Documentation section below
-│   ├── src/
+├── backend/                # see Backend section below
-│   │   ├── components/        # Video player, chat sidebar, now-playing overlay
+├── frontend/               # see Frontend section below
-│   │   ├── js/                # hls.js integration, WebSocket client, UI logic
+├── infrastructure/         # see Infrastructure section below
-│   │   └── styles/            # Tailwind / custom CSS
+├── monitoring/             # see Monitoring section below
-│   ├── index.html
+├── scripts/                # see Scripts section below
-│   └── package.json           # Build tools (Vite recommended)
+├── .editorconfig           # EditorConfig for consistent coding styles
-├── backend/
+├── .env.example            # Example environment variables for local development
-│   ├── playout/               # Continuous HLS generation from playlist
+├── .gitignore              # Ignore node_modules, build artifacts, etc.
-│   │   ├── src/               # FFmpeg orchestration, playlist manager
+├── .prettierignore         # Ignore files for Prettier formatting
-│   │   ├── config/
+├── CHANGELOG.md            # Release notes and version history
-│   │   └── Dockerfile
+├── CONTRIBUTING.md         # Contribution guidelines
-│   ├── chat/                  # Real-time WebSocket service
+├── docker-compose.prod.yml # Production deployment (Hetzner + Cloudflare)
 │   │   ├── src/               # Rooms, DMs, moderation, presence (Node/Go)
 │   │   ├── config/
 │   │   └── Dockerfile
 │   └── shared/                # Common utilities, types, normalization helpers
 ├── infrastructure/            # Deployment, IaC, Cloudflare configs
 │   ├── docker-compose.yml     # Local/dev orchestration
 │   ├── nginx/                 # Proxy, static serving, HLS delivery
 │   ├── cloudflare/            # Cache rule examples, Workers
 │   └── terraform/             # (optional) provisioning
 ├── scripts/                   # Automation scripts
 │   ├── normalize-video.sh     # Pre-process MP4s (codec, keyframes, CRF)
 │   ├── sync-to-r2.sh          # Upload segments/manifests to R2
 │   └── backup.sh
 ├── monitoring/                # Dashboards, alerts, logging
 │   ├── grafana/
 │   └── prometheus/
 ├── docs/
 │   └── architecture/
 │       ├── README.md          # arc42 template (fully populated)
 │       └── adr/
 │           ├── ADR-001.md             # Consolidated decision record
 │           ├── ADR-002-module-structure.md
 │           ├── ADR-003-tech-stack.md
 │           ├── ADR-004-admin-video.md
 │           ├── ADR-005-admin-moderation-analytics.md
 │           ├── ADR-006-data-storage.md
 │           └── ADR-007-redis-usage.md
 ├── .env.example
 ├── .gitignore
 ├── docker-compose.yml      # Top-level for dev (playout + chat + nginx)
-├── README.md
+└── README.md               # This file
 └── LICENSE
 ```
-### Folder Explanations
+### Documentation
- **`frontend/`**: The viewer experience — minimal, modern SPA with Tailwind + Alpine.js (or vanilla). Uses `hls.js` for playback and a WebSocket client for chat.
+- `docs/`: Folder containing all documentation for the project, including architecture, ADRs, operational procedures, and setup guides.
- **`backend/playout/`**: Core linear engine. FFmpeg consumes a normalized playlist and outputs continuous HLS. Includes normalization validation.
+- `docs/architecture/`: Architecture documentation, including high-level system architecture, component interactions, and decision records (ADRs).
 - **`backend/chat/`**: Independent WebSocket service (Node.js/Socket.io or Go). Handles public rooms, private DMs, presence (Redis), persistence (PostgreSQL/SQLite), rate limiting, and moderation.
 - **`backend/shared/`**: Reusable code (types, utils, video validation).
 - **`infrastructure/`**: Everything needed to deploy and configure the stack (Docker, Nginx, Cloudflare rules, future Terraform).
 - **`scripts/`**: One-off and CI-friendly scripts for video preparation, R2 sync, backups, and playlist management.
 - **`monitoring/`**: Grafana dashboards, Prometheus rules, logging configuration.
 - **`docs/architecture/`**: Complete arc42 documentation + ADRs 001-007 (the single source of truth for all architectural decisions).
-This structure directly reflects the building blocks, runtime flows, deployment view, and cross-cutting concepts defined in the arc42 documentation.
+see [README.md](docs/README.md) for full architecture, ADRs, and operational documentation.
 ### Backend
 - `backend/playout/`: Core linear engine. FFmpeg consumes a normalized playlist and outputs continuous HLS. Includes normalization validation.
 - `backend/chat/`: Independent WebSocket service (Node.js/Socket.io or Go). Handles public rooms, private DMs, presence (Redis), persistence (PostgreSQL/SQLite), rate limiting, and moderation.
 - `backend/shared/`: Reusable code (types, utils, video validation).
 ```text
 backend/
 ├── chat/                               # WebSocket chat service (Node.js or Go)
 │   ├── src/                            # Chat service source code (rooms, DMs, moderation)
 |   |   ├── auth/                       # Admin authentication and session management
 |   |   |   ├── auth_test.go            # Unit tests for authentication
 |   |   |   └── auth.go                 # Authentication logic (login, session validation)
 |   |   ├── config/                     # Configuration files for chat service
 |   |   |   ├── config_test.go          # Unit tests for configuration
 |   |   |   └── config.go               # Configuration loading and validation
 |   |   ├── db/                         # Database access and models
 |   |   |   ├── db_test.go              # Unit tests for database access
 |   |   |   ├── db.go                   # Database connection and query logic
 |   |   |   ├── models.go               # Database models (users, messages, rooms)
 |   |   |   └── redis.go                # Redis connection and presence management
 |   |   ├── handlers/                   # WebSocket message handlers
 |   |   |   ├── handlers_test.go        # Unit tests for WebSocket message handlers
 |   |   |   └── handlers.go             # WebSocket message handling logic
 |   |   ├── media/                      # Media-related utilities (e.g., video validation)
 |   |   |   ├── media_test.go           # Unit tests for media-related utilities
 |   |   |   └── media.go                # Media-related utility functions
 |   |   ├── metrics/                    # Prometheus metrics endpoints
 |   |   |   ├── metrics_test.go         # Unit tests for Prometheus metrics
 |   |   |   └── metrics.go              # Prometheus metrics collection and exposition
 |   |   ├── ratelimit/                  # Rate limiting logic (Redis-based)
 |   |   |   ├── ratelimit_test.go       # Unit tests for rate limiting
 |   |   |   └── ratelimit.go            # Rate limiting logic using Redis
 |   |   ├── ws/                         # WebSocket handlers
 |   |   |   ├── ws_test.go              # Unit tests for WebSocket handlers
 |   |   |   └── ws.go                   # WebSocket connection and message handling
 |   |   └── main.go                     # Entry point for chat service
 |   ├── Dockerfile                      # Dockerfile for chat service
 |   ├── go.mod                          # Go module file for chat service
 |   └── go.sum                          # Go checksum file for chat service
 └── playout/                            # Continuous HLS generation from playlist (Go)
    ├── demodata/                       # Sample media and playlist files for testing
    |   ├── media/                      # Sample media files for testing
    |   └── playlist/                   # Sample playlist files for testing
    ├── src/                            # Playout service source code (FFmpeg orchestration)
    |   ├── go.mod                      # Go module file for playout service
    |   ├── go.sum                      # Go checksum file for playout service
    |   ├── playlist_test.go            # Unit tests for playlist management
    |   └── playlist.go                 # Playlist management logic
    └── testdata/                       # Test data for playout service (sample playlists, media)
    |   ├── comments_only.txt           # Sample playlist with comments only
    |   ├── empty_playlist.txt          # Sample empty playlist
    |   ├── invalid_24fps.mp4           # Sample invalid 24fps video for testing
    |   ├── invalid_h265.mp4            # Sample invalid H.265 video for testing
    |   ├── mixed_valid_invalid.txt     # Sample playlist with mixed valid and invalid entries
    |   ├── valid_720p30.mp4            # Sample valid 720p30 video for testing
    |   └── valid_playlist.txt          # Sample valid playlist for testing
    ├── Dockerfile                      # Dockerfile for the playout service
    └── start-playout.sh                # Script to start the playout service
 ```
 ### Frontend
 The viewer experience — minimal, modern SPA with custom CSS + vanilla JS. Uses `hls.js` for playback and a WebSocket client for chat.
 ```text
 frontend/
 ├── admin/                  # Admin SPA (playlist management, moderation, analytics)
 │   ├── login/              # Login page for admin authentication
 |   |  └── index.html       # Admin login page
 |   └── index.html          # Admin SPA
 ├── public/                 # Static assets (favicon, images, etc.)
 │   ├── admin/              # Admin static assets
 |   |  ├── analytics.html   # Analytics dashboard page
 |   |  ├── chat-log.html    # Chat log viewer page
 |   |  ├── dashboard.html   # Admin dashboard page
 |   |  ├── moderation.html  # User moderation page
 |   |  ├── playlist.html    # Playlist management page
 |   |  ├── schedule.html    # Schedule overrides page
 |   |  ├── system.html      # System configuration page
 |   |  ├── upload.html      # Video upload page
 |   |  └── users.html       # User management page
 │   ├── favicon.ico         # Favicon for the SPA
 |   └── icons.svg           # SVG icons for the SPA
 ├── src/                    # Source code for the SPA
 │   ├── assets/             # Images, fonts, and other static assets
 |   |  ├── hero.png         # Hero image for the SPA
 |   |  ├── typescript.svg   # TypeScript logo for the SPA
 |   |  └── vite.svg         # Vite logo for the SPA
 │   ├── admin.test.ts       # Admin frontend tests (Vitest)
 │   ├── admin.ts            # Admin SPA logic (playlist, moderation, analytics)
 │   ├── counter.ts          # Counter component for testing
 │   ├── main.test.ts        # Main frontend tests (Vitest)
 │   ├── main.ts             # Main SPA logic (hls.js player, WebSocket chat)
 │   └── style.css           # Custom CSS for the SPA
 ├── .gitignore              # Ignore node_modules, build artifacts, etc.
 ├── index.html              # Main SPA entry point
 ├── package-lock.json       # Lockfile for npm dependencies
 ├── package.json            # Build tools (Vite recommended)
 ├── tsconfig.json           # TypeScript configuration
 ├── vite.config.ts          # Vite configuration
 └── vitest.config.ts        # Vitest configuration
 ```
 ### Infrastructure
 Everything needed to deploy and configure the stack (Docker, Nginx, Cloudflare rules, future Terraform).
 - Cloudflare
  - [linearvoid-media worker](infrastructure/cloudflare/) — R2-bound edge Worker serving HLS on `media.linearvoid.tv` (immutable segment caching, CORS, Range)
  - [linearvoid-frontend worker](frontend/wrangler.toml) — serves the static SPA on `linearvoid.tv`
 - Nginx
  - [Dockerfile](infrastructure/nginx/Dockerfile) — builds Nginx with custom config
  - [nginx.conf](infrastructure/nginx/nginx.conf) — reverse proxy, static SPA, HLS delivery
 ### Monitoring
 Grafana dashboards, Prometheus rules, logging configuration.
 - Grafana
  - dashboards
    - [dashboard.json](monitoring//grafana/dashboards/dashboard.json) — operational dashboards for playout, chat, and Redis
    - [dashboard.yml](monitoring//grafana/dashboards/dashboard.yml) — operational dashboards for playout, chat, and Redis
  - datasources
    - [datasource.yml](monitoring/grafana/datasources/datasource.yml) — Prometheus datasource configuration
  - [dashboard.json](monitoring/grafana/dashboard.json) — operational dashboards for playout, chat, and Redis
 - Prometheus
  - [alerts.yml](monitoring/prometheus/alerts.yml) — alerting rules for playout, chat, Redis, and system health
  - [prometheus.yml](monitoring/prometheus/prometheus.yml) — scrape targets for playout, chat, Redis, and system metrics
 ### Scripts
 One-off and CI-friendly scripts for video preparation, R2 sync, backups, and playlist management.
 - loadtest/
  - [admin-api.js](scripts/loadtest/admin-api.js) — admin API load test script
  - [run-loadtests.sh](scripts/loadtest/run-loadtests.sh) — bash script to run ws and/or admin load tests
  - [summarize-artillery.sh](scripts/loadtest/summarize-artillery.sh) — summarize Artillery JSON results
  - [summarize-k6.sh](scripts/loadtest/summarize-k6.sh) — summarize k6 JSON results
  - [ws-chat.yml](scripts/loadtest/ws-chat.yml) — WebSocket chat load test configuration
  PowerShell equivalents (`*.ps1`) of the three load-test scripts are kept alongside them.
 ## Getting Started
@@ -154,8 +265,8 @@ See the [architecture docs](docs/architecture/README.md) for detailed architectu
 | `VITE_PUBLIC_HLS_URL`  | `https://media.linearvoid.tv/hls/playlist.m3u8` | HLS playlist URL                 |
 | `ADMIN_USERNAME`       | `admin`                                         | Admin panel username             |
 | `ADMIN_PASSWORD`       | —                                               | Admin panel password             |
-| `HLS_SEGMENT_DURATION` | `6`                                             | HLS segment duration in seconds  |
+| `HLS_SEGMENT_DURATION` | `2`                                             | HLS segment duration in seconds  |
-| `HLS_WINDOW_SIZE`      | `24`                                            | HLS playlist window size         |
+| `HLS_WINDOW_SIZE`      | `12`                                            | HLS playlist window size         |
 Full reference: [`.env.example`](.env.example).
@@ -206,11 +317,12 @@ Contributions, issues, and further evolution (LL-HLS, ABR, multi-channel, E2EE)
 - [CHANGELOG.md](CHANGELOG.md) - Version history and completed features.
 - [CONTRIBUTING.md](CONTRIBUTING.md) - Guidelines for contributing to the project.
- [SETUP.md](SETUP.md) - Complete setup guide with prerequisites, environment configuration, running the application, and troubleshooting.
+- [SETUP.md](docs/SETUP.md) - Complete setup guide with prerequisites, environment configuration, running the application, and troubleshooting.
- [API.md](API.md) - Implemented WebSocket and REST API reference.
+- [API.md](docs/API.md) - Implemented WebSocket and REST API reference.
- [DEPLOYMENT.md](DEPLOYMENT.md) - Production deployment and operations guide.
+- [DEPLOYMENT.md](docs/DEPLOYMENT.md) - Production deployment and operations guide.
- [MONITORING.md](MONITORING.md) - Prometheus and Grafana setup and troubleshooting.
+- [MONITORING.md](docs/MONITORING.md) - Prometheus and Grafana setup and troubleshooting.
- [SECURITY.md](SECURITY.md) - Security controls, hardening checklist, and incident baseline.
+- [SECURITY.md](docs/SECURITY.md) - Security controls, hardening checklist, and incident baseline.
 - [Scaling Playbook](docs/operations/scaling-performance-playbook.md) - Performance test method, thresholds, and scaling decision flow.
 - [Architecture Documentation](docs/architecture/README.md) - Full arc42 template with diagrams and decisions.
 - [ADRs](docs/architecture/adr/) - Detailed decision records (ADR-001 to ADR-007).
@@ -227,8 +339,8 @@ Contributions are welcome! See [`CONTRIBUTING.md`](CONTRIBUTING.md) for guidelin
 3. Open PRs on [Gitea](https://git.allucanget.biz/zwitschi/linearvoid).
 4. CI validates builds and tests automatically.
-Since this a linear project, we also rely on a linear development and release model: Only main branch is used for releases, and all features are merged into main after review and CI validation. Releases are tagged with semantic versioning (1.0.3, 1.0.4, etc.) and automatically built/pushed to the container registry. Version numbers are declared in `frontend/package.json`, `CHANGELOG.md`, and the version badge in this README. For patches, we use even numbers for stable versions (1.0.2, 1.0.4) and odd numbers for pre-release/unstable versions (1.0.3, 1.0.5).
+Since this is a linear project, we also rely on a linear development and release model: only `main` branch is used for releases, and all features are merged into `main` after review and CI validation. Releases use semantic version tags in `*.*.*` format (for example `1.0.9`) and are automatically built/pushed to the container registry. Version numbers are declared in `frontend/package.json`, `CHANGELOG.md`, and the version badge in this README.
 [MIT License](LICENSE)
-The project is ready for use. See [`SETUP.md`](SETUP.md) for detailed installation instructions.
+The project is ready for use. See [`SETUP.md`](docs/SETUP.md) for detailed installation instructions.
@@ -1,467 +0,0 @@
 # Linear Void Setup Guide
 This guide covers prerequisites, environment setup, running the application locally and in production, and troubleshooting. It references the [architecture documentation](./docs/architecture/README.md)(`docs/architecture/README.md`).
 ## Prerequisites
 - **Docker & Docker Compose**: Required for running the full stack (playout, chat, nginx, redis, db, prometheus, grafana). Install from [docker.com](https://www.docker.com).
 - **Node.js 20+**: Required for frontend development and production builds (`cd frontend && npm install && npm run build`).
 - **npm**: Installed with Node.js and used for the frontend dependency installation and Vite workflow.
 - **Go 1.23+**: Recommended when working on the Go services outside Docker (`backend/chat`, `backend/playout`).
 - **FFmpeg**: Used by the playout service for HLS generation. Install via `apt install ffmpeg` (Linux), Homebrew (macOS), or Winget (Windows).
 - **Git**: For cloning and version control.
 - **Cloudflare Account**: For R2 storage and CDN (free tier sufficient for most use cases).
 - **Gitea Account**: Required if you want to push images to the self-hosted registry or use the repository's CI/CD flow.
  - Set up the required Actions secrets in Gitea at: [https://git.allucanget.biz/zwitschi/linearvoid/settings/actions/secrets](https://git.allucanget.biz/zwitschi/linearvoid/settings/actions/secrets)
  - Add the following secrets:
    - `CI_REGISTRY_USER`: Your Gitea username (e.g., `zwitschi`)
    - `CI_REGISTRY_TOKEN`: A Gitea Personal Access Token with `write:packages` scope
    - `ADMIN_USERNAME`: The administrator username for the production admin panel (e.g., `admin`)
    - `ADMIN_PASSWORD`: A strong password for the production admin panel
    - `DATABASE_URL`: The production database connection string (e.g., `postgres://linearvoid:<password>@db:5432/linearvoid?sslmode=disable`)
 - **Hetzner Cloud Account** (optional for production): For the US-East VPS (Ashburn, VA recommended per ADR-001).
 ## Network Environments
 Linear Void operates in two distinct environments. Know which one you're targeting.
 ```mermaid
 flowchart LR
    subgraph Test_Lab["Test Lab (192.168.88.0/24)"]
        TEST_HOST["192.168.88.40<br/>Docker Engine :2375"]
    end
    subgraph Prod["Production (Hetzner — NOT provisioned)"]
        PROD_HOST["Hetzner CX22 Ashburn, VA<br/>Public IP TBD"]
    end
    subgraph Gitea["Gitea CI/CD"]
        CI["CI: build + push images"]
        CD["CD: deploy via DOCKER_HOST"]
    end
    subgraph CF["Cloudflare"]
        DNS["linearvoid.tv"]
        R2["R2 Bucket"]
    end
    CD -->|"DOCKER_HOST=tcp://192.168.88.40:2375"| TEST_HOST
    CD -.->|"DOCKER_HOST=tcp://&lt;hetzner-ip&gt;:2375<br/>(when provisioned)"| PROD_HOST
    TEST_HOST -->|"test traffic"| DNS
    PROD_HOST -.->|"production traffic"| DNS
    TEST_HOST --> R2
    PROD_HOST -.-> R2
 ```
 **Test Lab (active):** Internal network `192.168.88.0/24`, host `192.168.88.40`. Receives automated CD deploys from Gitea Actions. Used for integration testing and staging validation.
 **Production (pending):** Hetzner Cloud VPS, Ashburn VA. Not yet provisioned. CD workflow and compose files are ready — only `DOCKER_HOST` needs changing. See Production Deployment section in [DEPLOYMENT.md](./DEPLOYMENT.md) for cutover plan.
 ## Development Prerequisites
 - **Frontend dependencies**: Run `cd frontend && npm install` before `npm run dev` or `npm run build`.
 - **Docker build support**: Local development expects Docker to be able to build the `chat`, `playout`, and `nginx` images referenced in `docker-compose.yml`.
 - **Data directories**: Create `data/playlist`, `data/media`, `data/hls`, and `data/chat` before the first run so bind mounts resolve cleanly.
 - **Database choice**: The stack defaults to PostgreSQL in `docker-compose.yml`. If you want SQLite for local-only development, update `DATABASE_URL` in `.env` accordingly.
 - **Redis availability**: Chat presence, rate limiting, and pub/sub require Redis. The compose stack provides it automatically.
 - **Video inputs**: Source videos should be normalized before playout. If the playlist contains invalid files, the playout container will fail its validation flow.
 ## Environment Setup
 1. **Clone the Repository** (if not already done):
   ```bash
   git clone https://git.allucanget.biz/zwitschi/linearvoid.git
   cd linearvoid
   ```
 2. **Copy Environment File**:
   ```bash
   cp .env.example .env
   ```
 3. **Configure `.env`** (edit with your values):
   ```env
   # Cloudflare R2 (required for video storage and $0 egress)
   R2_ACCESS_KEY_ID=your-r2-access-key
   R2_SECRET_ACCESS_KEY=your-r2-secret-key
   R2_BUCKET_NAME=linearvoid-media
   R2_ENDPOINT=https://your-account-id.r2.cloudflarestorage.com
   R2_REGION=auto
   # Cloudflare (for custom domain and cache rules)
   CLOUDFLARE_API_TOKEN=your-cloudflare-api-token
   CLOUDFLARE_ACCOUNT_ID=your-account-id
   MEDIA_DOMAIN=media.linearvoid.tv
   # Public frontend URLs
   # Preferred local setup uses the real public domains through Cloudflare and Nginx Proxy Manager.
   VITE_PUBLIC_APP_URL=https://linearvoid.tv
   VITE_PUBLIC_WS_URL=wss://linearvoid.tv/ws
   VITE_PUBLIC_HLS_URL=https://media.linearvoid.tv/hls/playlist.m3u8
   VITE_PUBLIC_ADMIN_DEFAULT_MODERATOR=admin
   VITE_PUBLIC_ADMIN_DEFAULT_ROOM=main
   VITE_PUBLIC_ADMIN_MODERATION_LOG_LIMIT=50
   ADMIN_USERNAME=admin
   ADMIN_PASSWORD=change-me
   ADMIN_SESSION_TTL_HOURS=12
   # Optional direct-local fallback when bypassing the public proxy:
   # VITE_PUBLIC_APP_URL=http://localhost
   # VITE_PUBLIC_WS_URL=ws://localhost/ws
   # VITE_PUBLIC_HLS_URL=http://localhost/hls/playlist.m3u8
   # Gitea Container Registry (for self-hosted Docker images)
   CI_REGISTRY_URL=git.allucanget.biz
   CI_REGISTRY_USER=your-gitea-username
   CI_REGISTRY_TOKEN=your-gitea-token
   CI_REGISTRY_NAMESPACE=zwitschi/linearvoid
   # Gitea API access (optional, for CI/release automation)
   CI_SERVER_URL=https://git.allucanget.biz
   # Chat / Database
   DATABASE_URL=postgres://linearvoid:linearvoid@db:5432/linearvoid?sslmode=disable
   # or for SQLite-only local development:
   # DATABASE_URL=sqlite://./data/chat.db
   REDIS_URL=redis://redis:6379/0
   # Ports (for local development)
   PLAYOUT_PORT=8080
   CHAT_PORT=3000
   NGINX_PORT=80
   # Playout Configuration
   PLAYLIST_PATH=/app/playlist.txt
   HLS_SEGMENT_DURATION=6
   HLS_WINDOW_SIZE=24
   # Logging / Monitoring
   LOG_LEVEL=info
   PROMETHEUS_PORT=9090
   GRAFANA_PORT=3001
   # Development flags
   NODE_ENV=development
   GO_ENV=development
   ```
 4. **Check local value overrides for Docker Compose**:
   - `docker-compose.yml` builds images locally and maps the frontend build output from `frontend/dist` into nginx.
   - `docker-compose.prod.yml` pulls prebuilt images from the Gitea registry.
   - Internal container-to-container URLs should use compose hostnames, for example `REDIS_URL=redis://redis:6379/0` and `DATABASE_URL=postgres://linearvoid:<password>@db:5432/linearvoid?sslmode=disable`.
   - For production public routing, set `VITE_PUBLIC_APP_URL=https://linearvoid.tv`, `VITE_PUBLIC_WS_URL=wss://linearvoid.tv/ws`, and `VITE_PUBLIC_HLS_URL=https://media.linearvoid.tv/hls/playlist.m3u8`.
 5. **Create Data Directories**:
   ```bash
   mkdir -p data/playlist data/media data/hls data/chat
   ```
 6. **Prepare Sample Videos** (optional):
   - Place normalized MP4 files in `data/media/`.
   - Create a `data/playlist/playlist.txt` with paths (see ADR-001 for normalization requirements).
 ## Cloudflare R2 Setup
 1. **Create an R2 bucket**:
   - Create a bucket such as `linearvoid-media` in Cloudflare R2.
   - Keep the bucket name aligned with `R2_BUCKET_NAME` in `.env`.
 2. **Generate R2 API credentials**:
   - Create an access key pair with read/write permissions for the bucket.
   - Set `R2_ACCESS_KEY_ID`, `R2_SECRET_ACCESS_KEY`, and `R2_REGION=auto` in `.env`.
 3. **Find the S3 endpoint**:
   - Use the account-scoped endpoint format `https://<account-id>.r2.cloudflarestorage.com`.
   - Store the account ID in both `R2_ENDPOINT` and `CLOUDFLARE_ACCOUNT_ID` where applicable.
 4. **Bind a custom media domain**:
   - Attach a domain such as `media.linearvoid.tv` to the bucket.
   - Set `MEDIA_DOMAIN` to that hostname.
 5. **Configure app-domain DNS and TLS**:
   - Point `linearvoid.tv` to the public entrypoint serving nginx.
   - Point `www.linearvoid.tv` to the same target and redirect it to `https://linearvoid.tv`.
   - Keep `media.linearvoid.tv` on the R2 custom domain path so HLS delivery stays split from the app origin.
   - Use Cloudflare proxied DNS with Full (strict) TLS so browser traffic uses `https://linearvoid.tv`, `wss://linearvoid.tv/ws`, and `https://media.linearvoid.tv`.
 6. **Apply cache behavior**:
   - Configure the `.ts` and `.m3u8` cache rules from `infrastructure/cloudflare/cache-rules.md`.
   - Enable Smart Tiered Cache for the R2-backed hostname.
   - If you need header normalization for immutable segment caching, deploy `infrastructure/cloudflare/worker.js` to the same zone.
 7. **Verify access**:
   - Confirm uploads with an S3-compatible client such as `aws s3 ls --endpoint-url <R2_ENDPOINT>`.
   - After deployment, check Cloudflare analytics for cache hit ratio and origin request volume.
 ## Gitea Setup
 1. **Create or verify a Gitea user**:
   - The user should have access to the repository and permission to read from the container registry.
 2. **Create an access token**:
   - Generate a token with the scopes needed for package/registry access and, if applicable, repository automation.
   - Store it as `CI_REGISTRY_TOKEN` in `.env`.
 3. **Configure Gitea Actions Secrets**:
   - Go to the repository settings page: [https://git.allucanget.biz/zwitschi/linearvoid/settings/actions/secrets](https://git.allucanget.biz/zwitschi/linearvoid/settings/actions/secrets)
   - Add the following secrets to enable automated CI/CD and production deployment:
     - `CI_REGISTRY_USER`: Your Gitea username (e.g., `zwitschi`).
     - `CI_REGISTRY_TOKEN`: Your Gitea Personal Access Token with `write:packages` scope.
     - `ADMIN_USERNAME`: The administrator username for the production admin panel (e.g., `admin`).
     - `ADMIN_PASSWORD`: A strong password for the production admin panel.
     - `DATABASE_URL`: The production database connection string (e.g., `postgres://linearvoid:<password>@db:5432/linearvoid?sslmode=disable`).
 4. **Configure registry variables**:
   - Set `CI_REGISTRY_URL` to the Gitea host.
   - Set `CI_REGISTRY_NAMESPACE` to the image namespace, for example `zwitschi/linearvoid`.
   - Set `CI_REGISTRY_USER` to the account that will push or pull images.
 5. **Authenticate Docker to the registry**:
   ```bash
   docker login git.allucanget.biz
   ```
 6. **Build and publish images when needed**:
   - Local development uses `docker-compose.yml`, which builds from source.
   - Production uses `docker-compose.prod.yml`, which expects the `playout`, `chat`, and `nginx` images to exist in the configured Gitea registry namespace.
 7. **Validate image availability**:
   - Before a production rollout, verify that the expected `:latest` tags can be pulled from the registry on the target server.
 ## Running the Application
 ### Local Development
 1. **Start All Services**:
   ```bash
   docker compose up --build
   ```
 2. **Access the Application**:
   - Preferred local access with the documented proxy setup: <https://linearvoid.tv>
   - Admin Interface: <https://linearvoid.tv/admin> (redirects to `/admin/login/` until authenticated)
   - Chat WebSocket: `wss://linearvoid.tv/ws`
   - Direct-local fallback when bypassing Cloudflare/Nginx Proxy Manager: <http://localhost>, <http://localhost/admin>, and `ws://localhost/ws`
   - Health Checks:
     - Playout: <http://localhost:8081/health>
     - Chat: <http://localhost:3000/health>
   - Monitoring:
     - Prometheus: <http://localhost:9090>
     - Grafana: <http://localhost:3001> (default login: admin/admin)
 3. **Frontend Development** (optional, for UI changes):
   ```bash
   cd frontend
   npm install
   npm run dev
   ```
   The dev server runs on <http://localhost:5173>. It proxies API calls to the backend services.
 4. **Build frontend assets for nginx-backed local runs**:
   ```bash
   cd frontend
   npm install
   npm run build
   ```
   The local nginx container serves `frontend/dist`, so rebuilding the frontend is required before validating production-like static output.
 5. **Stop Services**:
   ```bash
   docker compose down
   ```
 ### Local Test Environment Deployment (Remote Docker Host)
 For testing deployments on a local network server without setting up a full production VPS, you can deploy directly to a remote Docker host (e.g., a home lab server or test machine) using Docker's TCP socket.
 #### Test Environment Prerequisites
 - A remote server running Docker at IP `192.168.88.40` (running Alpine Linux).
 - Docker TCP socket enabled and listening on port `2375` on the remote server.
 ##### Enabling Docker TCP Socket on Alpine Linux
 To allow the Gitea Actions runner (or your local machine) to deploy to the remote Alpine host, you must configure the Docker daemon to listen on the TCP socket:
 1. Edit `/etc/conf.d/docker` on the Alpine host:
   ```bash
   vi /etc/conf.d/docker
   ```
 2. Update the `DOCKER_OPTS` line to include both the unix socket and the TCP socket:
   ```bash
   DOCKER_OPTS="-H unix:///var/run/docker.sock -H tcp://0.0.0.0:2375"
   ```
 3. Restart the Docker service:
   ```bash
   rc-service docker restart
   ```
 4. Verify that Docker is listening on port `2375`:
   ```bash
   netstat -tlnp | grep 2375
   ```
 5. Ensure any firewall (like `awall` or `iptables`) on the Alpine host allows incoming traffic on port `2375` from your local network subnet (e.g., `192.168.88.0/24`).
 #### Deployment Steps
 1. **Configure Docker CLI to use the Remote Host**:
   You can point your local Docker CLI to the remote server by setting the `DOCKER_HOST` environment variable:
   - **PowerShell (Windows)**:
     ```powershell
     $env:DOCKER_HOST="tcp://192.168.88.40:2375"
     ```
   - **Bash (Linux/macOS)**:
     ```bash
     export DOCKER_HOST="tcp://192.168.88.40:2375"
     ```
 2. **Verify Connection**:
   Run `docker info` to confirm your local CLI is communicating with the remote server at `192.168.88.40`:
   ```bash
   docker info
   ```
   The output should show the remote server's hostname and system details.
 3. **Deploy the Stack**:
   With `DOCKER_HOST` set, any `docker` or `docker compose` commands you run locally will execute directly on the remote server.
   - **Deploy from Registry (Production-like)**:
     ```bash
     docker compose -f docker-compose.prod.yml pull
     docker compose -f docker-compose.prod.yml up -d --remove-orphans
     ```
   - **Build and Deploy from Source**:
     ```bash
     docker compose up -d --build
     ```
 4. **Access the Test Environment**:
   - Playout Health: `http://192.168.88.40:8081/health`
   - Chat Health: `http://192.168.88.40:3000/health`
   - Nginx Entrypoint: `http://192.168.88.40:8080` (or the port mapped to `NGINX_PORT` in `.env`)
 5. **Reset to Local Docker Host**:
   Once testing is complete, clear the `DOCKER_HOST` variable to point back to your local machine:
   - **PowerShell**:
     ```powershell
     Remove-Item env:DOCKER_HOST
     ```
   - **Bash**:
     ```bash
     unset DOCKER_HOST
     ```
 ### Production Setup Guide
 1. **Prepare the target host**:
   - Provision a Linux VPS with Docker Engine, Docker Compose, Git, and enough disk for media, HLS output, PostgreSQL, Redis persistence, and monitoring data.
   - Open the ports required for HTTP/HTTPS and any restricted monitoring access you intend to expose.
 2. **Clone the repository and create the environment file**:
   ```bash
   git clone https://git.allucanget.biz/zwitschi/linearvoid.git
   cd linearvoid
   cp .env.example .env
   ```
 3. **Set production-safe `.env` values**:
   - Replace placeholder secrets.
   - Use compose-network hostnames for internal services, for example `redis` and `db`.
   - Set strong values for `POSTGRES_PASSWORD` and `GRAFANA_PASSWORD`.
   - Keep `MEDIA_DOMAIN`, R2 credentials, and Gitea registry values consistent with the external infrastructure.
   - Set `MEDIA_DOMAIN=media.linearvoid.tv`.
   - Set `VITE_PUBLIC_APP_URL=https://linearvoid.tv`, `VITE_PUBLIC_WS_URL=wss://linearvoid.tv/ws`, and `VITE_PUBLIC_HLS_URL=https://media.linearvoid.tv/hls/playlist.m3u8`.
   - If you intentionally bypass the public proxy for local-only testing, switch those values to `http://localhost`, `ws://localhost/ws`, and `http://localhost/hls/playlist.m3u8`.
 4. **Create runtime directories on the server**:
   ```bash
   mkdir -p data/playlist data/media data/hls data/chat
   ```
 5. **Publish or verify required images in Gitea**:
   - Ensure the `playout`, `chat`, and `nginx` images exist under `${CI_REGISTRY_URL}/${CI_REGISTRY_NAMESPACE}`.
   - Log in to the registry from the VPS before pulling.
 6. **Deploy the production stack**:
   ```bash
   docker compose -f docker-compose.prod.yml pull
   docker compose -f docker-compose.prod.yml up -d
   ```
 7. **Run post-deploy verification**:
   - Check `docker compose -f docker-compose.prod.yml ps`.
   - Confirm nginx, chat, and playout health endpoints respond.
   - Verify that HLS output is being written to `data/hls` and that the media domain serves manifests and segments through Cloudflare.
 8. **Harden and operate the deployment**:
   - Put HTTPS in front of nginx using Cloudflare or another reverse proxy, with `linearvoid.tv` as canonical app host and `www.linearvoid.tv` redirected.
   - Restrict Grafana and Prometheus exposure to trusted IPs or a private network.
   - Run the stack under systemd or another service manager if you need auto-start behavior outside Docker restart policies.
 ### Production Deployment (Hetzner VPS + Cloudflare)
 1. **Provision VPS**: Use Hetzner Cloud CX22 in Ashburn, VA (per ADR-001).
 2. **Configure Cloudflare**:
   - Create R2 bucket with `enam` location hint.
   - Set up custom media domain (`media.linearvoid.tv`) with the cache rules from `infrastructure/cloudflare/cache-rules.md`.
   - Point `linearvoid.tv` and `www.linearvoid.tv` at the app entrypoint, then redirect `www` to the apex domain.
   - Use Full (strict) TLS for both app and media hostnames.
   - Apply the Worker from `infrastructure/cloudflare/worker.js` for advanced header management.
 3. **Deploy**:
   - Copy the project to the VPS.
   - Use production compose: `docker compose -f docker-compose.prod.yml up -d`
   - Or pull from Gitea registry: `docker compose -f docker-compose.prod.yml pull && docker compose -f docker-compose.prod.yml up -d`
   - Configure systemd to manage the Docker Compose stack.
 4. **Monitoring**: Access Grafana at the exposed port for dashboards (included in `monitoring/grafana/dashboard.json`).
 See `docs/architecture/README.md` for the full arc42 documentation and the ADRs for architectural decisions.
 ## Troubleshooting
 - **R2 Upload Fails**: Check credentials in `.env` and ensure the bucket exists. Verify with `aws s3 ls --endpoint-url=$R2_ENDPOINT`.
 - **Normalization Errors**: Run `backend/playout/start-playout.sh` manually to see ffprobe output. All videos must be H.264/AAC, 30 fps constant, 2s keyframes (ADR-001).
 - **Chat Not Connecting**: Check Redis connection and WebSocket URL. The health check at `/health` should return 200.
 - **Cache Not Working**: Verify Cloudflare cache rules (`.ts` = long TTL immutable, `.m3u8` = short TTL). Check cache hit ratio in Cloudflare dashboard.
 - **Docker Issues**: Run `docker compose logs` for service-specific errors. Ensure ports are not in use.
 - **Admin Interface**: Ensure `ADMIN_USERNAME`, `ADMIN_PASSWORD`, and `ADMIN_SESSION_TTL_HOURS` are set. `/admin/` and `/api/admin/*` are protected by a session-based login flow.
 - **Production Pull Fails**: Confirm `docker login` to Gitea succeeded on the server and the image tags referenced by `docker-compose.prod.yml` exist.
 ## Further Reading
 - Architecture: `docs/architecture/README.md` (arc42 template with diagrams).
 - Decisions: `docs/architecture/adr/` (ADR-001 to ADR-007).
 - Contributing: `CONTRIBUTING.md`.
 - Project Structure: Root `README.md`.
 The system is ready for use. For production, review ADR-001 for cost estimates and scaling guidance.
 **Last Updated**: 2026-08-03
@@ -3,24 +3,33 @@ module chat
 go 1.25.0
 require (
 	github.com/glebarez/sqlite v1.11.0
 	github.com/gorilla/websocket v1.5.3
 	github.com/redis/go-redis/v9 v9.7.0
 	golang.org/x/crypto v0.37.0
 	gorm.io/driver/postgres v1.5.11
 	gorm.io/driver/sqlite v1.5.7
 	gorm.io/gorm v1.25.12
 )
 require (
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/glebarez/go-sqlite v1.21.2 // indirect
 	github.com/google/uuid v1.3.0 // indirect
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
 	github.com/jackc/pgx/v5 v5.7.5 // indirect
 	github.com/jackc/puddle/v2 v2.2.2 // indirect
 	github.com/jinzhu/inflection v1.0.0 // indirect
 	github.com/jinzhu/now v1.1.5 // indirect
-	github.com/mattn/go-sqlite3 v1.14.22 // indirect
+	github.com/mattn/go-isatty v0.0.17 // indirect
-	golang.org/x/crypto v0.37.0 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
 	golang.org/x/sync v0.13.0 // indirect
 	golang.org/x/sys v0.32.0 // indirect
 	golang.org/x/text v0.24.0 // indirect
 	modernc.org/libc v1.22.5 // indirect
 	modernc.org/mathutil v1.5.0 // indirect
 	modernc.org/memory v1.5.0 // indirect
 	modernc.org/sqlite v1.23.1 // indirect
 )
@@ -9,6 +9,16 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
 github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
 github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
 github.com/glebarez/go-sqlite v1.21.2 h1:3a6LFC4sKahUunAmynQKLZceZCOzUthkRkEAl9gAXWo=
 github.com/glebarez/go-sqlite v1.21.2/go.mod h1:sfxdZyhQjTM2Wry3gVYWaW072Ri1WMdWJi0k6+3382k=
 github.com/glebarez/sqlite v1.11.0 h1:wSG0irqzP6VurnMEpFGer5Li19RpIRi2qvQz++w0GMw=
 github.com/glebarez/sqlite v1.11.0/go.mod h1:h8/o8j5wiAsqSPoWELDUdJXhjAhsVliSn7bWZjOhrgQ=
 github.com/google/pprof v0.0.0-20221118152302-e6195bd50e26 h1:Xim43kblpZXfIBQsbuBVKCudVG457BR2GZFIz3uw3hQ=
 github.com/google/pprof v0.0.0-20221118152302-e6195bd50e26/go.mod h1:dDKJzRmX4S37WGHujM7tX//fmj1uioxKzKxz3lo4HJo=
 github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
 github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
 github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/jackc/pgpassfile v1.0.0 h1:/6Hmqy13Ss2zCq62VdNG8tM1wchn8zjSGOBJ6icpsIM=
@@ -23,12 +33,15 @@ github.com/jinzhu/inflection v1.0.0 h1:K317FqzuhWc8YvSVlFMCCUb36O/S9MCKRDI7QkRKD
 github.com/jinzhu/inflection v1.0.0/go.mod h1:h+uFLlag+Qp1Va5pdKtLDYj+kHp5pxUVkryuEj+Srlc=
 github.com/jinzhu/now v1.1.5 h1:/o9tlHleP7gOFmsnYNz3RGnqzefHA47wQpKrrdTIwXQ=
 github.com/jinzhu/now v1.1.5/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
-github.com/mattn/go-sqlite3 v1.14.22 h1:2gZY6PC6kBnID23Tichd1K+Z0oS6nE/XwU+Vz/5o4kU=
+github.com/mattn/go-isatty v0.0.17 h1:BTarxUcIeDqL27Mc+vyvdWYSL28zpIhv3RoTdsLMPng=
-github.com/mattn/go-sqlite3 v1.14.22/go.mod h1:Uh1q+B4BYcTPb+yiD3kU8Ct7aC0hY9fxUwlHK0RXw+Y=
+github.com/mattn/go-isatty v0.0.17/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/redis/go-redis/v9 v9.7.0 h1:HhLSs+B6O021gwzl+locl0zEDnyNkxMtf/Z3NNBMa9E=
 github.com/redis/go-redis/v9 v9.7.0/go.mod h1:f6zhXITC7JUJIlPEiBOTXxJgPLdZcA93GewI7inzyWw=
 github.com/remyoudompheng/bigfft v0.0.0-20200410134404-eec4a21b6bb0/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
 github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
 github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
@@ -38,6 +51,9 @@ golang.org/x/crypto v0.37.0 h1:kJNSjF/Xp7kU0iB2Z+9viTPMW4EqqsrywMXLJOOsXSE=
 golang.org/x/crypto v0.37.0/go.mod h1:vg+k43peMZ0pUMhYmVAWysMK35e6ioLh3wB8ZCAfbVc=
 golang.org/x/sync v0.13.0 h1:AauUjRAJ9OSnvULf/ARrrVywoJDy0YS2AwQ98I37610=
 golang.org/x/sync v0.13.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.32.0 h1:s77OFDvIQeibCmezSnk/q6iAfkdiQaJi4VzroCFrN20=
 golang.org/x/sys v0.32.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
 golang.org/x/text v0.24.0 h1:dd5Bzh4yt5KYA8f9CJHCP4FB4D51c2c6JvN37xJJkJ0=
 golang.org/x/text v0.24.0/go.mod h1:L8rBsPeo2pSS+xqN0d5u2ikmjtmoJbDBT1b7nHvFCdU=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
@@ -46,7 +62,13 @@ gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gorm.io/driver/postgres v1.5.11 h1:ubBVAfbKEUld/twyKZ0IYn9rSQh448EdelLYk9Mv314=
 gorm.io/driver/postgres v1.5.11/go.mod h1:DX3GReXH+3FPWGrrgffdvCk3DQ1dwDPdmbenSkweRGI=
 gorm.io/driver/sqlite v1.5.7 h1:8NvsrhP0ifM7LX9G4zPB97NwovUakUxc+2V2uuf3Z1I=
 gorm.io/driver/sqlite v1.5.7/go.mod h1:U+J8craQU6Fzkcvu8oLeAQmi50TkwPEhHDEjQZXDah4=
 gorm.io/gorm v1.25.12 h1:I0u8i2hWQItBq1WfE0o2+WuL9+8L21K9e2HHSTE/0f8=
 gorm.io/gorm v1.25.12/go.mod h1:xh7N7RHfYlNc5EmcI/El95gXusucDrQnHXe0+CgWcLQ=
 modernc.org/libc v1.22.5 h1:91BNch/e5B0uPbJFgqbxXuOnxBQjlS//icfQEGmvyjE=
 modernc.org/libc v1.22.5/go.mod h1:jj+Z7dTNX8fBScMVNRAYZ/jF91K8fdT2hYMThc3YjBY=
 modernc.org/mathutil v1.5.0 h1:rV0Ko/6SfM+8G+yKiyI830l3Wuz1zRutdslNoQ0kfiQ=
 modernc.org/mathutil v1.5.0/go.mod h1:mZW8CKdRPY1v87qxC/wUdX5O1qDzXMP5TH3wjfpga6E=
 modernc.org/memory v1.5.0 h1:N+/8c5rE6EqugZwHii4IFsaJ7MUhoWX07J5tC/iI5Ds=
 modernc.org/memory v1.5.0/go.mod h1:PkUhL0Mugw21sHPeskwZW4D6VscE/GQJOnIpCnW6pSU=
 modernc.org/sqlite v1.23.1 h1:nrSBg4aRQQwq59JpvGEQ15tNxoO5pX/kUjcRNwSAGQM=
 modernc.org/sqlite v1.23.1/go.mod h1:OrDj17Mggn6MhE+iPbBNf7RGKODDE9NFT0f3EwDzJqk=
@@ -0,0 +1,207 @@
 package auth
 import (
 	"crypto/rand"
 	"encoding/hex"
 	"net/http"
 	"strings"
 	"sync"
 	"time"
 )
 // SessionStore manages admin authentication sessions.
 type SessionStore struct {
 	mu       sync.Mutex
 	sessions map[string]time.Time
 }
 // NewSessionStore creates a new session store.
 func NewSessionStore() *SessionStore {
 	return &SessionStore{
 		sessions: make(map[string]time.Time),
 	}
 }
 // GenerateToken creates a cryptographically random 64-char hex session token.
 func GenerateToken() (string, error) {
 	buf := make([]byte, 32)
 	if _, err := rand.Read(buf); err != nil {
 		return "", err
 	}
 	return hex.EncodeToString(buf), nil
 }
 // Validate checks if a session token is valid and not expired.
 // Returns true if valid, false otherwise. Expired sessions are cleaned up.
 func (s *SessionStore) Validate(token string) bool {
 	if token == "" {
 		return false
 	}
 	s.mu.Lock()
 	defer s.mu.Unlock()
 	expiresAt, ok := s.sessions[token]
 	if !ok {
 		return false
 	}
 	if time.Now().After(expiresAt) {
 		delete(s.sessions, token)
 		return false
 	}
 	return true
 }
 // Add stores a session token with expiry.
 func (s *SessionStore) Add(token string, expiresAt time.Time) {
 	s.mu.Lock()
 	defer s.mu.Unlock()
 	s.sessions[token] = expiresAt
 }
 // Remove deletes a session token.
 func (s *SessionStore) Remove(token string) {
 	s.mu.Lock()
 	defer s.mu.Unlock()
 	delete(s.sessions, token)
 }
 // CountActive returns the number of unexpired sessions.
 func (s *SessionStore) CountActive() int {
 	now := time.Now()
 	s.mu.Lock()
 	defer s.mu.Unlock()
 	for token, expiresAt := range s.sessions {
 		if now.After(expiresAt) {
 			delete(s.sessions, token)
 		}
 	}
 	return len(s.sessions)
 }
 // CookieSecure determines if the session cookie should have Secure flag.
 func CookieSecure(r *http.Request) bool {
 	if forwardedProto := strings.TrimSpace(r.Header.Get("X-Forwarded-Proto")); forwardedProto != "" {
 		return strings.EqualFold(forwardedProto, "https")
 	}
 	return r.TLS != nil
 }
 // SameSiteForUserCookie returns the SameSite policy for the viewer session cookie.
 // Over HTTPS it returns SameSite=None so the cookie is sent cross-site from the
 // Workers-served SPA; over plain HTTP (local dev) it falls back to Lax.
 func SameSiteForUserCookie(r *http.Request) http.SameSite {
 	if CookieSecure(r) {
 		return http.SameSiteNoneMode
 	}
 	return http.SameSiteLaxMode
 }
 // SetCookie writes a session cookie with the given SameSite policy.
 // SameSite=None is only valid together with Secure, which is enforced here.
 func SetCookie(w http.ResponseWriter, r *http.Request, cookieName, token string, expiresAt time.Time, sameSite http.SameSite) {
 	secure := CookieSecure(r)
 	if sameSite == http.SameSiteNoneMode {
 		secure = true
 	}
 	http.SetCookie(w, &http.Cookie{
 		Name:     cookieName,
 		Value:    token,
 		Path:     "/",
 		HttpOnly: true,
 		SameSite: sameSite,
 		Secure:   secure,
 		Expires:  expiresAt,
 		MaxAge:   int(time.Until(expiresAt).Seconds()),
 	})
 }
 // ClearCookie removes a session cookie with the given SameSite policy.
 func ClearCookie(w http.ResponseWriter, r *http.Request, cookieName string, sameSite http.SameSite) {
 	secure := CookieSecure(r)
 	if sameSite == http.SameSiteNoneMode {
 		secure = true
 	}
 	http.SetCookie(w, &http.Cookie{
 		Name:     cookieName,
 		Value:    "",
 		Path:     "/",
 		HttpOnly: true,
 		SameSite: sameSite,
 		Secure:   secure,
 		Expires:  time.Unix(0, 0),
 		MaxAge:   -1,
 	})
 }
 // GetTokenFromCookie extracts the session token from the request cookie.
 func GetTokenFromCookie(r *http.Request, cookieName string) (string, bool) {
 	cookie, err := r.Cookie(cookieName)
 	if err != nil || cookie.Value == "" {
 		return "", false
 	}
 	return cookie.Value, true
 }
 // RequireAdmin returns middleware that checks for a valid admin session.
 func RequireAdmin(store *SessionStore, cookieName string) func(http.HandlerFunc) http.HandlerFunc {
 	return func(next http.HandlerFunc) http.HandlerFunc {
 		return func(w http.ResponseWriter, r *http.Request) {
 			token, ok := GetTokenFromCookie(r, cookieName)
 			if !ok || !store.Validate(token) {
 				http.Error(w, "unauthorized", http.StatusUnauthorized)
 				return
 			}
 			next(w, r)
 		}
 	}
 }
 // UserSessionStore maps user session tokens to usernames with expiry.
 type UserSessionStore struct {
 	mu       sync.Mutex
 	sessions map[string]userSession
 }
 type userSession struct {
 	Username  string
 	ExpiresAt time.Time
 }
 // NewUserSessionStore creates a new user session store.
 func NewUserSessionStore() *UserSessionStore {
 	return &UserSessionStore{sessions: make(map[string]userSession)}
 }
 // Add stores a user session token with username and expiry.
 func (s *UserSessionStore) Add(token, username string, expiresAt time.Time) {
 	s.mu.Lock()
 	defer s.mu.Unlock()
 	s.sessions[token] = userSession{Username: username, ExpiresAt: expiresAt}
 }
 // Username returns the username for a valid, unexpired token.
 func (s *UserSessionStore) Username(token string) (string, bool) {
 	if token == "" {
 		return "", false
 	}
 	s.mu.Lock()
 	defer s.mu.Unlock()
 	sess, ok := s.sessions[token]
 	if !ok {
 		return "", false
 	}
 	if time.Now().After(sess.ExpiresAt) {
 		delete(s.sessions, token)
 		return "", false
 	}
 	return sess.Username, true
 }
 // Remove deletes a user session token.
 func (s *UserSessionStore) Remove(token string) {
 	s.mu.Lock()
 	defer s.mu.Unlock()
 	delete(s.sessions, token)
 }
@@ -0,0 +1,309 @@
 package auth
 import (
 	"crypto/tls"
 	"net/http"
 	"net/http/httptest"
 	"testing"
 	"time"
 )
 func TestGenerateToken(t *testing.T) {
 	token, err := GenerateToken()
 	if err != nil {
 		t.Fatalf("GenerateToken() error = %v", err)
 	}
 	if len(token) != 64 {
 		t.Errorf("GenerateToken() length = %d, want 64", len(token))
 	}
 	// Uniqueness check
 	tokens := make(map[string]bool)
 	for i := 0; i < 1000; i++ {
 		tok, err := GenerateToken()
 		if err != nil {
 			t.Fatalf("GenerateToken() iteration %d error = %v", i, err)
 		}
 		if tokens[tok] {
 			t.Errorf("GenerateToken() produced duplicate token at iteration %d", i)
 		}
 		tokens[tok] = true
 	}
 }
 func TestSessionStore_Validate(t *testing.T) {
 	store := NewSessionStore()
 	// Empty token
 	if store.Validate("") {
 		t.Error("Validate(\"\") = true, want false")
 	}
 	// Missing token
 	if store.Validate("nonexistent") {
 		t.Error("Validate(\"nonexistent\") = true, want false")
 	}
 	// Valid token
 	token, _ := GenerateToken()
 	store.Add(token, time.Now().Add(1*time.Hour))
 	if !store.Validate(token) {
 		t.Error("Validate(valid) = false, want true")
 	}
 	// Expired token
 	expiredToken, _ := GenerateToken()
 	store.Add(expiredToken, time.Now().Add(-1*time.Hour))
 	if store.Validate(expiredToken) {
 		t.Error("Validate(expired) = true, want false")
 	}
 	// Expired token should be cleaned up
 	if store.Validate(expiredToken) {
 		t.Error("Validate(expired) second call = true, want false (should be cleaned)")
 	}
 }
 func TestSessionStore_AddRemove(t *testing.T) {
 	store := NewSessionStore()
 	token, _ := GenerateToken()
 	store.Add(token, time.Now().Add(1*time.Hour))
 	if !store.Validate(token) {
 		t.Error("Validate after Add = false, want true")
 	}
 	store.Remove(token)
 	if store.Validate(token) {
 		t.Error("Validate after Remove = true, want false")
 	}
 }
 func TestSessionStore_CountActive(t *testing.T) {
 	store := NewSessionStore()
 	if count := store.CountActive(); count != 0 {
 		t.Errorf("CountActive() = %d, want 0", count)
 	}
 	t1, _ := GenerateToken()
 	t2, _ := GenerateToken()
 	t3, _ := GenerateToken()
 	store.Add(t1, time.Now().Add(1*time.Hour))
 	store.Add(t2, time.Now().Add(1*time.Hour))
 	store.Add(t3, time.Now().Add(-1*time.Hour)) // expired
 	if count := store.CountActive(); count != 2 {
 		t.Errorf("CountActive() = %d, want 2 (expired should be cleaned)", count)
 	}
 }
 func TestCookieSecure(t *testing.T) {
 	tests := []struct {
 		name           string
 		forwardedProto string
 		tls            bool
 		expected       bool
 	}{
 		{"https forwarded", "https", false, true},
 		{"http forwarded", "http", false, false},
 		{"empty forwarded, no TLS", "", false, false},
 		{"empty forwarded, TLS", "", true, true},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			req := httptest.NewRequest("GET", "/", nil)
 			if tt.forwardedProto != "" {
 				req.Header.Set("X-Forwarded-Proto", tt.forwardedProto)
 			}
 			if tt.tls {
 				req.TLS = &tls.ConnectionState{}
 			}
 			if got := CookieSecure(req); got != tt.expected {
 				t.Errorf("CookieSecure() = %v, want %v", got, tt.expected)
 			}
 		})
 	}
 }
 func TestSetCookie(t *testing.T) {
 	req := httptest.NewRequest("GET", "/", nil)
 	req.Header.Set("X-Forwarded-Proto", "https")
 	w := httptest.NewRecorder()
 	expiresAt := time.Now().Add(1 * time.Hour)
 	SetCookie(w, req, "test_cookie", "abc123", expiresAt, http.SameSiteStrictMode)
 	cookies := w.Result().Cookies()
 	if len(cookies) != 1 {
 		t.Fatalf("expected 1 cookie, got %d", len(cookies))
 	}
 	c := cookies[0]
 	if c.Name != "test_cookie" {
 		t.Errorf("cookie name = %q, want test_cookie", c.Name)
 	}
 	if c.Value != "abc123" {
 		t.Errorf("cookie value = %q, want abc123", c.Value)
 	}
 	if !c.HttpOnly {
 		t.Error("cookie HttpOnly = false, want true")
 	}
 	if c.SameSite != http.SameSiteStrictMode {
 		t.Errorf("cookie SameSite = %v, want Strict", c.SameSite)
 	}
 	if !c.Secure {
 		t.Error("cookie Secure = false, want true (X-Forwarded-Proto: https)")
 	}
 	if c.Path != "/" {
 		t.Errorf("cookie Path = %q, want /", c.Path)
 	}
 }
 func TestClearCookie(t *testing.T) {
 	req := httptest.NewRequest("GET", "/", nil)
 	w := httptest.NewRecorder()
 	ClearCookie(w, req, "test_cookie", http.SameSiteStrictMode)
 	cookies := w.Result().Cookies()
 	if len(cookies) != 1 {
 		t.Fatalf("expected 1 cookie, got %d", len(cookies))
 	}
 	c := cookies[0]
 	if c.Name != "test_cookie" {
 		t.Errorf("cookie name = %q, want test_cookie", c.Name)
 	}
 	if c.Value != "" {
 		t.Errorf("cookie value = %q, want empty", c.Value)
 	}
 	if c.MaxAge != -1 {
 		t.Errorf("cookie MaxAge = %d, want -1", c.MaxAge)
 	}
 }
 func TestSameSiteForUserCookie(t *testing.T) {
 	req := httptest.NewRequest("GET", "/", nil)
 	req.Header.Set("X-Forwarded-Proto", "https")
 	if got := SameSiteForUserCookie(req); got != http.SameSiteNoneMode {
 		t.Errorf("SameSiteForUserCookie(https) = %v, want None", got)
 	}
 	req2 := httptest.NewRequest("GET", "/", nil)
 	if got := SameSiteForUserCookie(req2); got != http.SameSiteLaxMode {
 		t.Errorf("SameSiteForUserCookie(http) = %v, want Lax", got)
 	}
 }
 func TestSetCookie_NoneForcesSecure(t *testing.T) {
 	req := httptest.NewRequest("GET", "/", nil)
 	w := httptest.NewRecorder()
 	expiresAt := time.Now().Add(1 * time.Hour)
 	SetCookie(w, req, "test_cookie", "abc123", expiresAt, http.SameSiteNoneMode)
 	cookies := w.Result().Cookies()
 	if len(cookies) != 1 {
 		t.Fatalf("expected 1 cookie, got %d", len(cookies))
 	}
 	c := cookies[0]
 	if c.SameSite != http.SameSiteNoneMode {
 		t.Errorf("cookie SameSite = %v, want None", c.SameSite)
 	}
 	if !c.Secure {
 		t.Error("cookie Secure = false, want true (SameSite=None requires Secure)")
 	}
 }
 func TestGetTokenFromCookie(t *testing.T) {
 	req := httptest.NewRequest("GET", "/", nil)
 	req.AddCookie(&http.Cookie{Name: "session", Value: "token123"})
 	token, ok := GetTokenFromCookie(req, "session")
 	if !ok {
 		t.Error("GetTokenFromCookie() ok = false, want true")
 	}
 	if token != "token123" {
 		t.Errorf("GetTokenFromCookie() = %q, want token123", token)
 	}
 	// Missing cookie
 	_, ok = GetTokenFromCookie(req, "nonexistent")
 	if ok {
 		t.Error("GetTokenFromCookie() for missing cookie ok = true, want false")
 	}
 	// Empty value
 	req2 := httptest.NewRequest("GET", "/", nil)
 	req2.AddCookie(&http.Cookie{Name: "session", Value: ""})
 	_, ok = GetTokenFromCookie(req2, "session")
 	if ok {
 		t.Error("GetTokenFromCookie() for empty value ok = true, want false")
 	}
 }
 func TestRequireAdmin(t *testing.T) {
 	store := NewSessionStore()
 	token, _ := GenerateToken()
 	store.Add(token, time.Now().Add(1*time.Hour))
 	handler := RequireAdmin(store, "session")(func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusOK)
 		w.Write([]byte("ok"))
 	})
 	// Valid session
 	req := httptest.NewRequest("GET", "/", nil)
 	req.AddCookie(&http.Cookie{Name: "session", Value: token})
 	w := httptest.NewRecorder()
 	handler(w, req)
 	if w.Code != http.StatusOK {
 		t.Errorf("status = %d, want 200", w.Code)
 	}
 	// No cookie
 	req2 := httptest.NewRequest("GET", "/", nil)
 	w2 := httptest.NewRecorder()
 	handler(w2, req2)
 	if w2.Code != http.StatusUnauthorized {
 		t.Errorf("status = %d, want 401", w2.Code)
 	}
 	// Invalid token
 	req3 := httptest.NewRequest("GET", "/", nil)
 	req3.AddCookie(&http.Cookie{Name: "session", Value: "invalid"})
 	w3 := httptest.NewRecorder()
 	handler(w3, req3)
 	if w3.Code != http.StatusUnauthorized {
 		t.Errorf("status = %d, want 401", w3.Code)
 	}
 }
 func TestUserSessionStore(t *testing.T) {
 	store := NewUserSessionStore()
 	if _, ok := store.Username(""); ok {
 		t.Error("Username(\"\") = true, want false")
 	}
 	token, _ := GenerateToken()
 	store.Add(token, "alice", time.Now().Add(1*time.Hour))
 	username, ok := store.Username(token)
 	if !ok || username != "alice" {
 		t.Errorf("Username() = %q, %v; want alice, true", username, ok)
 	}
 	// Expired session
 	expired, _ := GenerateToken()
 	store.Add(expired, "bob", time.Now().Add(-1*time.Hour))
 	if _, ok := store.Username(expired); ok {
 		t.Error("Username(expired) = true, want false")
 	}
 	// Remove
 	store.Remove(token)
 	if _, ok := store.Username(token); ok {
 		t.Error("Username after Remove = true, want false")
 	}
 }
@@ -0,0 +1,132 @@
 package config
 import (
 	"os"
 	"strconv"
 	"strings"
 	"time"
 )
 // Defaults and constants
 const (
 	AdminSessionCookieName = "linearvoid_admin_session"
 	MaxAdminUploadBytes    int64 = 2 * 1024 * 1024 * 1024
 	DefaultAdminChunkSize  int64 = 8 * 1024 * 1024
 	MaxAdminChunkSize      int64 = 32 * 1024 * 1024
 	DefaultRateLimitMax          = 10
 	DefaultRateLimitWindow       = 10 * time.Second
 	DefaultAdminSessionTTL       = 12 * time.Hour
 	DefaultUserSessionTTL        = 30 * 24 * time.Hour
 	DefaultChatPort              = "3000"
 )
 // PlaylistPath returns the playlist file path from env or default.
 func PlaylistPath() string {
 	p := strings.TrimSpace(os.Getenv("PLAYLIST_PATH"))
 	if p == "" {
 		return "/app/playlist/playlist.txt"
 	}
 	return p
 }
 // MediaDir returns the media directory from env or default.
 func MediaDir() string {
 	d := strings.TrimSpace(os.Getenv("MEDIA_DIR"))
 	if d == "" {
 		return "/app/media"
 	}
 	return d
 }
 // AdminUsername returns the admin username from env or default.
 func AdminUsername() string {
 	u := strings.TrimSpace(os.Getenv("ADMIN_USERNAME"))
 	if u == "" {
 		return "admin"
 	}
 	return u
 }
 // AdminPassword returns the admin password from env or default.
 func AdminPassword() string {
 	p := strings.TrimSpace(os.Getenv("ADMIN_PASSWORD"))
 	if p == "" {
 		return "admin"
 	}
 	return p
 }
 // AdminSessionTTL returns the admin session TTL from env or default.
 func AdminSessionTTL() time.Duration {
 	raw := strings.TrimSpace(os.Getenv("ADMIN_SESSION_TTL_HOURS"))
 	if raw == "" {
 		return DefaultAdminSessionTTL
 	}
 	hours, err := strconv.Atoi(raw)
 	if err != nil || hours <= 0 {
 		return DefaultAdminSessionTTL
 	}
 	return time.Duration(hours) * time.Hour
 }
 // UserSessionTTL returns the user session TTL from env or default (30 days).
 func UserSessionTTL() time.Duration {
 	raw := strings.TrimSpace(os.Getenv("USER_SESSION_TTL_HOURS"))
 	if raw == "" {
 		return DefaultUserSessionTTL
 	}
 	hours, err := strconv.Atoi(raw)
 	if err != nil || hours <= 0 {
 		return DefaultUserSessionTTL
 	}
 	return time.Duration(hours) * time.Hour
 }
 // RateLimitMax returns the chat rate limit max messages per window.
 func RateLimitMax() int {
 	raw := strings.TrimSpace(os.Getenv("CHAT_RATE_LIMIT_MAX"))
 	if raw == "" {
 		return DefaultRateLimitMax
 	}
 	v, err := strconv.Atoi(raw)
 	if err != nil || v <= 0 {
 		return DefaultRateLimitMax
 	}
 	return v
 }
 // RateLimitWindow returns the chat rate limit window duration.
 func RateLimitWindow() time.Duration {
 	raw := strings.TrimSpace(os.Getenv("CHAT_RATE_LIMIT_WINDOW_S"))
 	if raw == "" {
 		return DefaultRateLimitWindow
 	}
 	v, err := strconv.Atoi(raw)
 	if err != nil || v <= 0 {
 		return DefaultRateLimitWindow
 	}
 	return time.Duration(v) * time.Second
 }
 // ChatPort returns the chat service port from env or default.
 func ChatPort() string {
 	p := strings.TrimSpace(os.Getenv("CHAT_PORT"))
 	if p == "" {
 		return DefaultChatPort
 	}
 	return p
 }
 // RedisAddress returns the Redis address from env or default.
 func RedisAddress() string {
 	a := strings.TrimSpace(os.Getenv("REDIS_URL"))
 	if a == "" {
 		return "redis:6379"
 	}
 	return a
 }
 // DatabaseURL returns the database URL from env (empty = SQLite default).
 func DatabaseURL() string {
 	return strings.TrimSpace(os.Getenv("DATABASE_URL"))
 }
@@ -0,0 +1,267 @@
 package config
 import (
 	"os"
 	"testing"
 	"time"
 )
 func TestPlaylistPath(t *testing.T) {
 	tests := []struct {
 		name     string
 		env      string
 		expected string
 	}{
 		{"default", "", "/app/playlist/playlist.txt"},
 		{"custom", "/custom/playlist.txt", "/custom/playlist.txt"},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			if tt.env != "" {
 				os.Setenv("PLAYLIST_PATH", tt.env)
 				defer os.Unsetenv("PLAYLIST_PATH")
 			} else {
 				os.Unsetenv("PLAYLIST_PATH")
 			}
 			if got := PlaylistPath(); got != tt.expected {
 				t.Errorf("PlaylistPath() = %q, want %q", got, tt.expected)
 			}
 		})
 	}
 }
 func TestMediaDir(t *testing.T) {
 	tests := []struct {
 		name     string
 		env      string
 		expected string
 	}{
 		{"default", "", "/app/media"},
 		{"custom", "/data/media", "/data/media"},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			if tt.env != "" {
 				os.Setenv("MEDIA_DIR", tt.env)
 				defer os.Unsetenv("MEDIA_DIR")
 			} else {
 				os.Unsetenv("MEDIA_DIR")
 			}
 			if got := MediaDir(); got != tt.expected {
 				t.Errorf("MediaDir() = %q, want %q", got, tt.expected)
 			}
 		})
 	}
 }
 func TestAdminUsername(t *testing.T) {
 	tests := []struct {
 		name     string
 		env      string
 		expected string
 	}{
 		{"default", "", "admin"},
 		{"custom", "superadmin", "superadmin"},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			if tt.env != "" {
 				os.Setenv("ADMIN_USERNAME", tt.env)
 				defer os.Unsetenv("ADMIN_USERNAME")
 			} else {
 				os.Unsetenv("ADMIN_USERNAME")
 			}
 			if got := AdminUsername(); got != tt.expected {
 				t.Errorf("AdminUsername() = %q, want %q", got, tt.expected)
 			}
 		})
 	}
 }
 func TestAdminPassword(t *testing.T) {
 	tests := []struct {
 		name     string
 		env      string
 		expected string
 	}{
 		{"default", "", "admin"},
 		{"custom", "secret123", "secret123"},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			if tt.env != "" {
 				os.Setenv("ADMIN_PASSWORD", tt.env)
 				defer os.Unsetenv("ADMIN_PASSWORD")
 			} else {
 				os.Unsetenv("ADMIN_PASSWORD")
 			}
 			if got := AdminPassword(); got != tt.expected {
 				t.Errorf("AdminPassword() = %q, want %q", got, tt.expected)
 			}
 		})
 	}
 }
 func TestAdminSessionTTL(t *testing.T) {
 	tests := []struct {
 		name     string
 		env      string
 		expected time.Duration
 	}{
 		{"default", "", 12 * time.Hour},
 		{"custom", "24", 24 * time.Hour},
 		{"zero", "0", 12 * time.Hour},
 		{"negative", "-5", 12 * time.Hour},
 		{"invalid", "abc", 12 * time.Hour},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			if tt.env != "" {
 				os.Setenv("ADMIN_SESSION_TTL_HOURS", tt.env)
 				defer os.Unsetenv("ADMIN_SESSION_TTL_HOURS")
 			} else {
 				os.Unsetenv("ADMIN_SESSION_TTL_HOURS")
 			}
 			if got := AdminSessionTTL(); got != tt.expected {
 				t.Errorf("AdminSessionTTL() = %v, want %v", got, tt.expected)
 			}
 		})
 	}
 }
 func TestRateLimitMax(t *testing.T) {
 	tests := []struct {
 		name     string
 		env      string
 		expected int
 	}{
 		{"default", "", 10},
 		{"custom", "20", 20},
 		{"zero", "0", 10},
 		{"negative", "-5", 10},
 		{"invalid", "abc", 10},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			if tt.env != "" {
 				os.Setenv("CHAT_RATE_LIMIT_MAX", tt.env)
 				defer os.Unsetenv("CHAT_RATE_LIMIT_MAX")
 			} else {
 				os.Unsetenv("CHAT_RATE_LIMIT_MAX")
 			}
 			if got := RateLimitMax(); got != tt.expected {
 				t.Errorf("RateLimitMax() = %d, want %d", got, tt.expected)
 			}
 		})
 	}
 }
 func TestRateLimitWindow(t *testing.T) {
 	tests := []struct {
 		name     string
 		env      string
 		expected time.Duration
 	}{
 		{"default", "", 10 * time.Second},
 		{"custom", "30", 30 * time.Second},
 		{"zero", "0", 10 * time.Second},
 		{"negative", "-5", 10 * time.Second},
 		{"invalid", "abc", 10 * time.Second},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			if tt.env != "" {
 				os.Setenv("CHAT_RATE_LIMIT_WINDOW_S", tt.env)
 				defer os.Unsetenv("CHAT_RATE_LIMIT_WINDOW_S")
 			} else {
 				os.Unsetenv("CHAT_RATE_LIMIT_WINDOW_S")
 			}
 			if got := RateLimitWindow(); got != tt.expected {
 				t.Errorf("RateLimitWindow() = %v, want %v", got, tt.expected)
 			}
 		})
 	}
 }
 func TestChatPort(t *testing.T) {
 	tests := []struct {
 		name     string
 		env      string
 		expected string
 	}{
 		{"default", "", "3000"},
 		{"custom", "8080", "8080"},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			if tt.env != "" {
 				os.Setenv("CHAT_PORT", tt.env)
 				defer os.Unsetenv("CHAT_PORT")
 			} else {
 				os.Unsetenv("CHAT_PORT")
 			}
 			if got := ChatPort(); got != tt.expected {
 				t.Errorf("ChatPort() = %q, want %q", got, tt.expected)
 			}
 		})
 	}
 }
 func TestRedisAddress(t *testing.T) {
 	tests := []struct {
 		name     string
 		env      string
 		expected string
 	}{
 		{"default", "", "redis:6379"},
 		{"custom", "redis.example.com:6380", "redis.example.com:6380"},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			if tt.env != "" {
 				os.Setenv("REDIS_URL", tt.env)
 				defer os.Unsetenv("REDIS_URL")
 			} else {
 				os.Unsetenv("REDIS_URL")
 			}
 			if got := RedisAddress(); got != tt.expected {
 				t.Errorf("RedisAddress() = %q, want %q", got, tt.expected)
 			}
 		})
 	}
 }
 func TestDatabaseURL(t *testing.T) {
 	tests := []struct {
 		name     string
 		env      string
 		expected string
 	}{
 		{"default", "", ""},
 		{"sqlite", "sqlite://test.db", "sqlite://test.db"},
 		{"postgres", "postgres://user:pass@localhost/db", "postgres://user:pass@localhost/db"},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			if tt.env != "" {
 				os.Setenv("DATABASE_URL", tt.env)
 				defer os.Unsetenv("DATABASE_URL")
 			} else {
 				os.Unsetenv("DATABASE_URL")
 			}
 			if got := DatabaseURL(); got != tt.expected {
 				t.Errorf("DatabaseURL() = %q, want %q", got, tt.expected)
 			}
 		})
 	}
 }
@@ -0,0 +1,221 @@
 package config
 import (
 	"encoding/json"
 	"fmt"
 	"net/url"
 	"os"
 	"path/filepath"
 	"strconv"
 	"strings"
 	"sync"
 )
 // Runtime configuration keys stored in the runtime config file.
 const (
 	keyMatomoURL     = "matomo_url"
 	keyMatomoSiteID  = "matomo_site_id"
 	keyHLSSegmentDur = "hls_segment_duration"
 	keyHLSWindowSize = "hls_window_size"
 )
 // Default HLS values used when neither env nor persisted config is set.
 const (
 	defaultHLSSegmentDuration = 2
 	defaultHLSWindowSize      = 12
 )
 var (
 	runtimeMu    sync.RWMutex
 	runtimeStore = map[string]string{}
 )
 // ConfigPath returns the runtime config JSON file path from env or default.
 // The default lives in the shared playlist volume so the playout service can
 // read the same file (chat has read-write, playout read-only).
 func ConfigPath() string {
 	p := strings.TrimSpace(os.Getenv("CONFIG_PATH"))
 	if p == "" {
 		return "/app/playlist/config.json"
 	}
 	return p
 }
 // GetRuntime returns a value from the runtime store and whether it is present.
 func GetRuntime(key string) (string, bool) {
 	runtimeMu.RLock()
 	defer runtimeMu.RUnlock()
 	v, ok := runtimeStore[key]
 	return v, ok
 }
 // SetRuntime stores a value in the runtime store (in-memory only).
 func SetRuntime(key, value string) {
 	runtimeMu.Lock()
 	defer runtimeMu.Unlock()
 	runtimeStore[key] = value
 }
 // LoadRuntimeConfig loads the persisted runtime config from disk. If the file does
 // not exist, it seeds the store from environment variables.
 func LoadRuntimeConfig() error {
 	data, err := os.ReadFile(ConfigPath())
 	if err != nil {
 		if os.IsNotExist(err) {
 			runtimeMu.Lock()
 			runtimeStore = map[string]string{}
 			runtimeMu.Unlock()
 			seedRuntimeDefaults()
 			return nil
 		}
 		return fmt.Errorf("read runtime config: %w", err)
 	}
 	values := map[string]string{}
 	if err := json.Unmarshal(data, &values); err != nil {
 		return fmt.Errorf("parse runtime config: %w", err)
 	}
 	runtimeMu.Lock()
 	defer runtimeMu.Unlock()
 	runtimeStore = values
 	return nil
 }
 // SaveRuntimeConfig persists the runtime store to disk as JSON.
 func SaveRuntimeConfig() error {
 	runtimeMu.RLock()
 	data, err := json.MarshalIndent(runtimeStore, "", "  ")
 	runtimeMu.RUnlock()
 	if err != nil {
 		return fmt.Errorf("marshal runtime config: %w", err)
 	}
 	if dir := filepath.Dir(ConfigPath()); dir != "" && dir != "." {
 		if err := os.MkdirAll(dir, 0o755); err != nil {
 			return fmt.Errorf("create runtime config dir: %w", err)
 		}
 	}
 	if err := os.WriteFile(ConfigPath(), append(data, '\n'), 0o644); err != nil {
 		return fmt.Errorf("write runtime config: %w", err)
 	}
 	return nil
 }
 // seedRuntimeDefaults populates the store from environment variables.
 func seedRuntimeDefaults() {
 	if v := strings.TrimSpace(os.Getenv("MATOMO_URL")); v != "" {
 		SetRuntime(keyMatomoURL, v)
 	}
 	if v := strings.TrimSpace(os.Getenv("MATOMO_SITE_ID")); v != "" {
 		SetRuntime(keyMatomoSiteID, v)
 	}
 	if v := strings.TrimSpace(os.Getenv("HLS_SEGMENT_DURATION")); v != "" {
 		SetRuntime(keyHLSSegmentDur, v)
 	}
 	if v := strings.TrimSpace(os.Getenv("HLS_WINDOW_SIZE")); v != "" {
 		SetRuntime(keyHLSWindowSize, v)
 	}
 }
 // MatomoURL returns the Matomo analytics URL.
 func MatomoURL() string {
 	if v, ok := GetRuntime(keyMatomoURL); ok && strings.TrimSpace(v) != "" {
 		return strings.TrimSpace(v)
 	}
 	return strings.TrimSpace(os.Getenv("MATOMO_URL"))
 }
 // MatomoSiteID returns the Matomo site ID.
 func MatomoSiteID() string {
 	if v, ok := GetRuntime(keyMatomoSiteID); ok && strings.TrimSpace(v) != "" {
 		return strings.TrimSpace(v)
 	}
 	return strings.TrimSpace(os.Getenv("MATOMO_SITE_ID"))
 }
 // HLSSegmentDuration returns the HLS segment duration in seconds.
 func HLSSegmentDuration() int {
 	raw := ""
 	if v, ok := GetRuntime(keyHLSSegmentDur); ok {
 		raw = strings.TrimSpace(v)
 	}
 	if raw == "" {
 		raw = strings.TrimSpace(os.Getenv("HLS_SEGMENT_DURATION"))
 	}
 	n, err := strconv.Atoi(raw)
 	if err != nil || n <= 0 {
 		return defaultHLSSegmentDuration
 	}
 	return n
 }
 // HLSWindowSize returns the HLS playlist window size in segments.
 func HLSWindowSize() int {
 	raw := ""
 	if v, ok := GetRuntime(keyHLSWindowSize); ok {
 		raw = strings.TrimSpace(v)
 	}
 	if raw == "" {
 		raw = strings.TrimSpace(os.Getenv("HLS_WINDOW_SIZE"))
 	}
 	n, err := strconv.Atoi(raw)
 	if err != nil || n <= 0 {
 		return defaultHLSWindowSize
 	}
 	return n
 }
 // SetMatomoURL validates and stores the Matomo URL.
 func SetMatomoURL(raw string) error {
 	raw = strings.TrimSpace(raw)
 	if raw == "" {
 		SetRuntime(keyMatomoURL, "")
 		return nil
 	}
 	u, err := url.Parse(raw)
 	if err != nil || (u.Scheme != "http" && u.Scheme != "https") || u.Host == "" {
 		return fmt.Errorf("matomo URL must be an absolute http(s) URL")
 	}
 	SetRuntime(keyMatomoURL, raw)
 	return nil
 }
 // SetMatomoSiteID validates and stores the Matomo site ID.
 func SetMatomoSiteID(raw string) error {
 	raw = strings.TrimSpace(raw)
 	if raw != "" {
 		if _, err := strconv.Atoi(raw); err != nil {
 			return fmt.Errorf("matomo site ID must be numeric")
 		}
 	}
 	SetRuntime(keyMatomoSiteID, raw)
 	return nil
 }
 // SetHLSSegmentDuration validates (2–15s) and stores the HLS segment duration.
 func SetHLSSegmentDuration(seconds int) error {
 	if seconds < 2 || seconds > 15 {
 		return fmt.Errorf("HLS segment duration must be between 2 and 15 seconds")
 	}
 	SetRuntime(keyHLSSegmentDur, strconv.Itoa(seconds))
 	return nil
 }
 // SetHLSWindowSize validates (3–100) and stores the HLS window size.
 func SetHLSWindowSize(size int) error {
 	if size < 3 || size > 100 {
 		return fmt.Errorf("HLS window size must be between 3 and 100 segments")
 	}
 	SetRuntime(keyHLSWindowSize, strconv.Itoa(size))
 	return nil
 }
 // RuntimeConfigSnapshot returns the resolved runtime configuration values.
 func RuntimeConfigSnapshot() map[string]any {
 	return map[string]any{
 		"matomoUrl":          MatomoURL(),
 		"matomoSiteId":       MatomoSiteID(),
 		"hlsSegmentDuration": HLSSegmentDuration(),
 		"hlsWindowSize":      HLSWindowSize(),
 	}
 }
@@ -0,0 +1,181 @@
 package config
 import (
 	"os"
 	"path/filepath"
 	"testing"
 )
 func resetRuntime(t *testing.T) {
 	t.Helper()
 	runtimeMu.Lock()
 	runtimeStore = map[string]string{}
 	runtimeMu.Unlock()
 	os.Unsetenv("CONFIG_PATH")
 	os.Unsetenv("MATOMO_URL")
 	os.Unsetenv("MATOMO_SITE_ID")
 	os.Unsetenv("HLS_SEGMENT_DURATION")
 	os.Unsetenv("HLS_WINDOW_SIZE")
 }
 func TestConfigPath(t *testing.T) {
 	resetRuntime(t)
 	if got := ConfigPath(); got != "/app/playlist/config.json" {
 		t.Errorf("ConfigPath() = %q, want default /app/playlist/config.json", got)
 	}
 	os.Setenv("CONFIG_PATH", "/tmp/custom.json")
 	defer os.Unsetenv("CONFIG_PATH")
 	if got := ConfigPath(); got != "/tmp/custom.json" {
 		t.Errorf("ConfigPath() = %q, want /tmp/custom.json", got)
 	}
 }
 func TestGetSetRuntime(t *testing.T) {
 	resetRuntime(t)
 	if _, ok := GetRuntime("foo"); ok {
 		t.Errorf("expected missing key")
 	}
 	SetRuntime("foo", "bar")
 	v, ok := GetRuntime("foo")
 	if !ok || v != "bar" {
 		t.Errorf("GetRuntime() = %q, %v; want bar, true", v, ok)
 	}
 }
 func TestGettersDefaults(t *testing.T) {
 	resetRuntime(t)
 	if got := MatomoURL(); got != "" {
 		t.Errorf("MatomoURL() = %q, want empty", got)
 	}
 	if got := MatomoSiteID(); got != "" {
 		t.Errorf("MatomoSiteID() = %q, want empty", got)
 	}
 	if got := HLSSegmentDuration(); got != 2 {
 		t.Errorf("HLSSegmentDuration() = %d, want 2", got)
 	}
 	if got := HLSWindowSize(); got != 12 {
 		t.Errorf("HLSWindowSize() = %d, want 12", got)
 	}
 }
 func TestGettersEnvFallback(t *testing.T) {
 	resetRuntime(t)
 	os.Setenv("HLS_SEGMENT_DURATION", "4")
 	os.Setenv("HLS_WINDOW_SIZE", "30")
 	os.Setenv("MATOMO_URL", "https://analytics.example.com")
 	os.Setenv("MATOMO_SITE_ID", "7")
 	if got := HLSSegmentDuration(); got != 4 {
 		t.Errorf("HLSSegmentDuration() = %d, want 4", got)
 	}
 	if got := HLSWindowSize(); got != 30 {
 		t.Errorf("HLSWindowSize() = %d, want 30", got)
 	}
 	if got := MatomoURL(); got != "https://analytics.example.com" {
 		t.Errorf("MatomoURL() = %q", got)
 	}
 	if got := MatomoSiteID(); got != "7" {
 		t.Errorf("MatomoSiteID() = %q", got)
 	}
 }
 func TestLoadRuntimeConfigSeedsFromEnv(t *testing.T) {
 	resetRuntime(t)
 	dir := t.TempDir()
 	os.Setenv("CONFIG_PATH", filepath.Join(dir, "config.json"))
 	os.Setenv("HLS_SEGMENT_DURATION", "8")
 	if err := LoadRuntimeConfig(); err != nil {
 		t.Fatalf("LoadRuntimeConfig error: %v", err)
 	}
 	if got := HLSSegmentDuration(); got != 8 {
 		t.Errorf("HLSSegmentDuration() = %d, want 8 (seeded from env)", got)
 	}
 }
 func TestSaveAndLoadRuntimeConfig(t *testing.T) {
 	resetRuntime(t)
 	dir := t.TempDir()
 	os.Setenv("CONFIG_PATH", filepath.Join(dir, "config.json"))
 	if err := SetHLSSegmentDuration(5); err != nil {
 		t.Fatal(err)
 	}
 	if err := SetHLSWindowSize(30); err != nil {
 		t.Fatal(err)
 	}
 	if err := SetMatomoURL("https://stats.example.com"); err != nil {
 		t.Fatal(err)
 	}
 	if err := SetMatomoSiteID("42"); err != nil {
 		t.Fatal(err)
 	}
 	if err := SaveRuntimeConfig(); err != nil {
 		t.Fatalf("SaveRuntimeConfig error: %v", err)
 	}
 	// Reset the store and reload from disk.
 	runtimeMu.Lock()
 	runtimeStore = map[string]string{}
 	runtimeMu.Unlock()
 	if err := LoadRuntimeConfig(); err != nil {
 		t.Fatalf("LoadRuntimeConfig error: %v", err)
 	}
 	if got := HLSSegmentDuration(); got != 5 {
 		t.Errorf("HLSSegmentDuration() = %d, want 5", got)
 	}
 	if got := HLSWindowSize(); got != 30 {
 		t.Errorf("HLSWindowSize() = %d, want 30", got)
 	}
 	if got := MatomoURL(); got != "https://stats.example.com" {
 		t.Errorf("MatomoURL() = %q", got)
 	}
 	if got := MatomoSiteID(); got != "42" {
 		t.Errorf("MatomoSiteID() = %q", got)
 	}
 }
 func TestSettersValidation(t *testing.T) {
 	resetRuntime(t)
 	if err := SetHLSSegmentDuration(1); err == nil {
 		t.Error("expected error for duration 1")
 	}
 	if err := SetHLSSegmentDuration(20); err == nil {
 		t.Error("expected error for duration 20")
 	}
 	if err := SetHLSSegmentDuration(6); err != nil {
 		t.Errorf("unexpected error for duration 6: %v", err)
 	}
 	if err := SetHLSWindowSize(2); err == nil {
 		t.Error("expected error for window 2")
 	}
 	if err := SetHLSWindowSize(101); err == nil {
 		t.Error("expected error for window 101")
 	}
 	if err := SetHLSWindowSize(24); err != nil {
 		t.Errorf("unexpected error for window 24: %v", err)
 	}
 	if err := SetMatomoURL("not-a-url"); err == nil {
 		t.Error("expected error for invalid URL")
 	}
 	if err := SetMatomoURL("ftp://example.com"); err == nil {
 		t.Error("expected error for non-http URL")
 	}
 	if err := SetMatomoURL("https://stats.example.com"); err != nil {
 		t.Errorf("unexpected error for valid URL: %v", err)
 	}
 	if err := SetMatomoSiteID("abc"); err == nil {
 		t.Error("expected error for non-numeric site ID")
 	}
 	if err := SetMatomoSiteID("99"); err != nil {
 		t.Errorf("unexpected error for numeric site ID: %v", err)
 	}
 }
@@ -0,0 +1,82 @@
 package db
 import (
 	"context"
 	"log"
 	"strings"
 	"time"
 	"github.com/glebarez/sqlite"
 	"gorm.io/driver/postgres"
 	"gorm.io/gorm"
 )
 // DBClient wraps gorm.DB for testability.
 type DBClient struct {
 	*gorm.DB
 }
 // InitDB initializes configured SQL storage for chat, moderation, and admin metadata (ADR-006).
 // Returns the client and the driver name.
 func InitDB(databaseURL string) (*DBClient, string, error) {
 	var (
 		gormDB *gorm.DB
 		err    error
 		driver = "sqlite"
 	)
 	switch {
 	case databaseURL == "":
 		gormDB, err = gorm.Open(sqlite.Open("chat.db"), &gorm.Config{})
 	case strings.HasPrefix(databaseURL, "sqlite://"):
 		sqlitePath := strings.TrimPrefix(databaseURL, "sqlite://")
 		if sqlitePath == "" {
 			sqlitePath = "chat.db"
 		}
 		gormDB, err = gorm.Open(sqlite.Open(sqlitePath), &gorm.Config{})
 	case strings.HasPrefix(databaseURL, "postgres://") || strings.HasPrefix(databaseURL, "postgresql://"):
 		driver = "postgres"
 		gormDB, err = gorm.Open(postgres.Open(databaseURL), &gorm.Config{})
 	default:
 		log.Fatalf("Unsupported DATABASE_URL scheme: %s", databaseURL)
 	}
 	if err != nil {
 		return nil, driver, err
 	}
 	gormDB.AutoMigrate(&Message{}, &ModerationLog{}, &Media{}, &ScheduleOverride{}, &User{})
 	log.Printf("%s database initialized (chat history, moderation log, media metadata)", strings.Title(driver))
 	return &DBClient{DB: gormDB}, driver, nil
 }
 // RedisClient wraps the Redis client for testability.
 // Interface defined for mocking in tests.
 type RedisClient interface {
 	Ping(ctx context.Context) error
 	Set(ctx context.Context, key string, value interface{}, expiration time.Duration) error
 	Get(ctx context.Context, key string) (string, error)
 	Del(ctx context.Context, keys ...string) error
 	Incr(ctx context.Context, key string) (int64, error)
 	Decr(ctx context.Context, key string) (int64, error)
 	Expire(ctx context.Context, key string, expiration time.Duration) error
 	Exists(ctx context.Context, keys ...string) (int64, error)
 	Publish(ctx context.Context, channel string, message interface{}) error
 	PSubscribe(ctx context.Context, channels ...string) PubSub
 	Scan(ctx context.Context, cursor uint64, match string, count int64) ([]string, uint64, error)
 	Info(ctx context.Context, sections ...string) (string, error)
 	Close() error
 }
 // PubSub wraps Redis pub/sub subscription.
 type PubSub interface {
 	ReceiveMessage(ctx context.Context) (*PubSubMessage, error)
 	Close() error
 }
 // PubSubMessage represents a received pub/sub message.
 type PubSubMessage struct {
 	Channel string
 	Payload string
 }
@@ -0,0 +1,179 @@
 package db
 import (
 	"testing"
 	"time"
 )
 func TestInitDB_SQLite(t *testing.T) {
 	client, driver, err := InitDB("sqlite://:memory:")
 	if err != nil {
 		t.Fatalf("InitDB() error = %v", err)
 	}
 	if driver != "sqlite" {
 		t.Errorf("InitDB() driver = %q, want sqlite", driver)
 	}
 	if client == nil {
 		t.Fatal("InitDB() client = nil")
 	}
 	// Verify tables exist by running AutoMigrate (idempotent)
 	err = client.DB.AutoMigrate(&Message{}, &ModerationLog{}, &Media{}, &ScheduleOverride{})
 	if err != nil {
 		t.Errorf("AutoMigrate error = %v", err)
 	}
 	// Verify CRUD on Message
 	msg := Message{
 		Room:      "test",
 		Username:  "user1",
 		Text:      "hello",
 		Timestamp: time.Now(),
 		Type:      "public",
 	}
 	if err := client.DB.Create(&msg).Error; err != nil {
 		t.Fatalf("Create message error = %v", err)
 	}
 	if msg.ID == 0 {
 		t.Error("Create message did not set ID")
 	}
 	var count int64
 	client.DB.Model(&Message{}).Count(&count)
 	if count != 1 {
 		t.Errorf("Message count = %d, want 1", count)
 	}
 	// Verify read
 	var read Message
 	if err := client.DB.First(&read, msg.ID).Error; err != nil {
 		t.Fatalf("First message error = %v", err)
 	}
 	if read.Text != "hello" {
 		t.Errorf("read.Text = %q, want hello", read.Text)
 	}
 	// Verify delete
 	client.DB.Delete(&Message{}, msg.ID)
 	client.DB.Model(&Message{}).Count(&count)
 	if count != 0 {
 		t.Errorf("Message count after delete = %d, want 0", count)
 	}
 }
 func TestInitDB_ModerationLog(t *testing.T) {
 	client, _, err := InitDB("sqlite://:memory:")
 	if err != nil {
 		t.Fatalf("InitDB() error = %v", err)
 	}
 	log := ModerationLog{
 		Action:    "mute",
 		Target:    "user1",
 		Moderator: "admin",
 		Reason:    "spam",
 		Timestamp: time.Now(),
 	}
 	if err := client.DB.Create(&log).Error; err != nil {
 		t.Fatalf("Create moderation log error = %v", err)
 	}
 	if log.ID == 0 {
 		t.Error("Create moderation log did not set ID")
 	}
 	var count int64
 	client.DB.Model(&ModerationLog{}).Count(&count)
 	if count != 1 {
 		t.Errorf("ModerationLog count = %d, want 1", count)
 	}
 }
 func TestInitDB_Media(t *testing.T) {
 	client, _, err := InitDB("sqlite://:memory:")
 	if err != nil {
 		t.Fatalf("InitDB() error = %v", err)
 	}
 	media := Media{
 		Filename:        "test.mp4",
 		OriginalName:    "test.mp4",
 		Path:            "/media/test.mp4",
 		SizeBytes:       1024,
 		DurationSeconds: 60,
 		Status:          "ready",
 		Title:           "Test Video",
 		Tags:            "tag1,tag2",
 	}
 	if err := client.DB.Create(&media).Error; err != nil {
 		t.Fatalf("Create media error = %v", err)
 	}
 	if media.ID == 0 {
 		t.Error("Create media did not set ID")
 	}
 	// Verify update
 	client.DB.Model(&media).Update("status", "needs_normalization")
 	var updated Media
 	client.DB.First(&updated, media.ID)
 	if updated.Status != "needs_normalization" {
 		t.Errorf("updated.Status = %q, want needs_normalization", updated.Status)
 	}
 }
 func TestInitDB_ScheduleOverride(t *testing.T) {
 	client, _, err := InitDB("sqlite://:memory:")
 	if err != nil {
 		t.Fatalf("InitDB() error = %v", err)
 	}
 	now := time.Now()
 	ov := ScheduleOverride{
 		MediaID:   1,
 		StartTime: now,
 		EndTime:   now.Add(1 * time.Hour),
 		Reason:    "special event",
 	}
 	if err := client.DB.Create(&ov).Error; err != nil {
 		t.Fatalf("Create schedule override error = %v", err)
 	}
 	if ov.ID == 0 {
 		t.Error("Create schedule override did not set ID")
 	}
 	// Conflict detection
 	var conflict int64
 	client.DB.Model(&ScheduleOverride{}).
 		Where("start_time < ? AND end_time > ?", ov.EndTime, ov.StartTime).
 		Count(&conflict)
 	if conflict != 1 {
 		t.Errorf("conflict count = %d, want 1", conflict)
 	}
 }
 func TestInitDB_EmptyURL(t *testing.T) {
 	// Empty URL should default to SQLite chat.db
 	// This creates a file, clean up after
 	client, driver, err := InitDB("")
 	if err != nil {
 		t.Fatalf("InitDB(\"\") error = %v", err)
 	}
 	if driver != "sqlite" {
 		t.Errorf("InitDB(\"\") driver = %q, want sqlite", driver)
 	}
 	if client == nil {
 		t.Fatal("InitDB(\"\") client = nil")
 	}
 }
 func TestInitDB_SQLitePath(t *testing.T) {
 	client, driver, err := InitDB("sqlite://:memory:?cache=shared")
 	if err != nil {
 		t.Fatalf("InitDB() error = %v", err)
 	}
 	if driver != "sqlite" {
 		t.Errorf("InitDB() driver = %q, want sqlite", driver)
 	}
 	if client == nil {
 		t.Fatal("InitDB() client = nil")
 	}
 }
@@ -0,0 +1,65 @@
 package db
 import (
 	"time"
 )
 // Message represents a chat message (persisted in SQL DB per ADR-006)
 type Message struct {
 	ID        uint      `gorm:"primarykey" json:"id"`
 	Room      string    `json:"room"`
 	Username  string    `json:"username"`
 	Text      string    `json:"text"`
 	Timestamp time.Time `json:"timestamp"`
 	Type      string    `json:"type"` // "public", "private", "system", "moderation"
 }
 // ModerationLog for audit trail (immutable per ADR-005)
 type ModerationLog struct {
 	ID        uint      `gorm:"primarykey" json:"id"`
 	Action    string    `json:"action"` // "mute", "ban", "delete", "timeout"
 	Target    string    `json:"target"`
 	Moderator string    `json:"moderator"`
 	Reason    string    `json:"reason"`
 	Timestamp time.Time `json:"timestamp"`
 }
 // Media stores admin media library metadata (filesystem + DB model per ADR-006)
 type Media struct {
 	ID              uint      `gorm:"primarykey" json:"id"`
 	Filename        string    `gorm:"index" json:"filename"`
 	OriginalName    string    `json:"originalName"`
 	Path            string    `json:"path"`
 	SizeBytes       int64     `json:"sizeBytes"`
 	DurationSeconds int       `json:"durationSeconds"`
 	Status          string    `gorm:"index" json:"status"`
 	Title           string    `json:"title"`
 	Tags            string    `json:"tags"`
 	UploadedAt      time.Time `gorm:"autoCreateTime" json:"uploadedAt"`
 	UpdatedAt       time.Time `gorm:"autoUpdateTime" json:"updatedAt"`
 }
 // User represents a registered chat user account (ADR-006).
 type User struct {
 	ID           uint      `gorm:"primarykey" json:"id"`
 	Username     string    `gorm:"uniqueIndex;size:32" json:"username"`
 	PasswordHash string    `json:"-"`
 	CreatedAt    time.Time `gorm:"autoCreateTime" json:"createdAt"`
 }
 // ScheduleOverride represents a scheduled playlist override (ADR-004)
 type ScheduleOverride struct {
 	ID        uint      `gorm:"primarykey" json:"id"`
 	MediaID   uint      `json:"mediaId"`
 	StartTime time.Time `json:"startTime"`
 	EndTime   time.Time `json:"endTime"`
 	Reason    string    `json:"reason"`
 	CreatedAt time.Time `json:"createdAt"`
 }
 // Presence tracks online users per room (using Redis per ADR-007)
 type Presence struct {
 	Username string `json:"username"`
 	Room     string `json:"room"`
 	Online   bool   `json:"online"`
 }
@@ -0,0 +1,163 @@
 package db
 import (
 	"context"
 	"log"
 	"strings"
 	"time"
 	"github.com/redis/go-redis/v9"
 )
 // RedisWrapper wraps go-redis client to implement RedisClient interface.
 type RedisWrapper struct {
 	client *redis.Client
 }
 // NewRedisWrapper creates a RedisWrapper from a go-redis client.
 func NewRedisWrapper(client *redis.Client) *RedisWrapper {
 	return &RedisWrapper{client: client}
 }
 // InitRedis initializes Redis for presence, rate limiting, and pub/sub (ADR-007).
 // Returns nil if Redis is unavailable (non-fatal).
 func InitRedis(redisAddress string) *RedisWrapper {
 	var options *redis.Options
 	var err error
 	if strings.Contains(redisAddress, "://") {
 		options, err = redis.ParseURL(redisAddress)
 		if err != nil {
 			log.Printf("Redis configuration warning: %v (rate limiting and presence will be disabled)", err)
 			return nil
 		}
 	} else {
 		options = &redis.Options{Addr: redisAddress}
 	}
 	client := redis.NewClient(options)
 	if err := client.Ping(context.Background()).Err(); err != nil {
 		log.Printf("Redis connection warning: %v (rate limiting and presence will be disabled)", err)
 		client.Close()
 		// Start auto-reconnect goroutine
 		go redisReconnectLoop(redisAddress, options)
 		return nil
 	}
 	log.Println("Redis connected successfully (presence, rate limiting, pub/sub enabled)")
 	return &RedisWrapper{client: client}
 }
 // redisReconnectLoop attempts to reconnect to Redis with exponential backoff.
 func redisReconnectLoop(addr string, baseOptions *redis.Options) {
 	backoff := 2 * time.Second
 	maxBackoff := 60 * time.Second
 	for {
 		time.Sleep(backoff)
 		testClient := redis.NewClient(baseOptions)
 		if err := testClient.Ping(context.Background()).Err(); err != nil {
 			log.Printf("Redis reconnect failed: %v (retry in %v)", err, backoff)
 			backoff *= 2
 			if backoff > maxBackoff {
 				backoff = maxBackoff
 			}
 			testClient.Close()
 			continue
 		}
 		// Reconnected — caller must replace their reference.
 		// This is a best-effort background reconnect; the wrapper
 		// returned by InitRedis remains nil until a new InitRedis call.
 		log.Println("Redis reconnected successfully (background)")
 		testClient.Close()
 		return
 	}
 }
 // Ping checks Redis connectivity.
 func (r *RedisWrapper) Ping(ctx context.Context) error {
 	if r == nil || r.client == nil {
 		return redis.ErrClosed
 	}
 	return r.client.Ping(ctx).Err()
 }
 // Set stores a key with TTL.
 func (r *RedisWrapper) Set(ctx context.Context, key string, value interface{}, expiration time.Duration) error {
 	return r.client.Set(ctx, key, value, expiration).Err()
 }
 // Get retrieves a key.
 func (r *RedisWrapper) Get(ctx context.Context, key string) (string, error) {
 	return r.client.Get(ctx, key).Result()
 }
 // Del removes keys.
 func (r *RedisWrapper) Del(ctx context.Context, keys ...string) error {
 	return r.client.Del(ctx, keys...).Err()
 }
 // Incr increments a key.
 func (r *RedisWrapper) Incr(ctx context.Context, key string) (int64, error) {
 	return r.client.Incr(ctx, key).Result()
 }
 // Decr decrements a key.
 func (r *RedisWrapper) Decr(ctx context.Context, key string) (int64, error) {
 	return r.client.Decr(ctx, key).Result()
 }
 // Expire sets TTL on a key.
 func (r *RedisWrapper) Expire(ctx context.Context, key string, expiration time.Duration) error {
 	return r.client.Expire(ctx, key, expiration).Err()
 }
 // Exists checks if keys exist.
 func (r *RedisWrapper) Exists(ctx context.Context, keys ...string) (int64, error) {
 	return r.client.Exists(ctx, keys...).Result()
 }
 // Publish publishes a message to a channel.
 func (r *RedisWrapper) Publish(ctx context.Context, channel string, message interface{}) error {
 	return r.client.Publish(ctx, channel, message).Err()
 }
 // PSubscribe subscribes to channels by pattern.
 func (r *RedisWrapper) PSubscribe(ctx context.Context, channels ...string) PubSub {
 	ps := r.client.PSubscribe(ctx, channels...)
 	return &redisPubSubWrapper{ps: ps}
 }
 // Scan scans keys matching a pattern.
 func (r *RedisWrapper) Scan(ctx context.Context, cursor uint64, match string, count int64) ([]string, uint64, error) {
 	return r.client.Scan(ctx, cursor, match, count).Result()
 }
 // Info returns Redis server info.
 func (r *RedisWrapper) Info(ctx context.Context, sections ...string) (string, error) {
 	return r.client.Info(ctx, sections...).Result()
 }
 // Close closes the Redis connection.
 func (r *RedisWrapper) Close() error {
 	if r == nil || r.client == nil {
 		return nil
 	}
 	return r.client.Close()
 }
 // redisPubSubWrapper wraps go-redis PubSub.
 type redisPubSubWrapper struct {
 	ps *redis.PubSub
 }
 func (w *redisPubSubWrapper) ReceiveMessage(ctx context.Context) (*PubSubMessage, error) {
 	msg, err := w.ps.ReceiveMessage(ctx)
 	if err != nil {
 		return nil, err
 	}
 	return &PubSubMessage{Channel: msg.Channel, Payload: msg.Payload}, nil
 }
 func (w *redisPubSubWrapper) Close() error {
 	return w.ps.Close()
 }
@@ -0,0 +1,450 @@
 package media
 import (
 	"context"
 	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
 	"os"
 	"os/exec"
 	"path/filepath"
 	"sort"
 	"strconv"
 	"strings"
 	"time"
 	"gorm.io/gorm"
 )
 // FormatDuration converts seconds to HH:MM:SS string.
 func FormatDuration(seconds int) string {
 	if seconds < 0 {
 		seconds = 0
 	}
 	hours := seconds / 3600
 	minutes := (seconds % 3600) / 60
 	remainingSeconds := seconds % 60
 	return fmt.Sprintf("%02d:%02d:%02d", hours, minutes, remainingSeconds)
 }
 // NormalizationResult holds ffprobe validation output for admin uploads.
 type NormalizationResult struct {
 	Valid  bool     `json:"valid"`
 	Errors []string `json:"errors"`
 }
 // ValidateNormalization runs ffprobe against a media file and checks
 // conformance with the Linear Void normalization profile (ADR-001).
 func ValidateNormalization(mediaPath string) NormalizationResult {
 	result := NormalizationResult{Valid: true, Errors: []string{}}
 	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
 	defer cancel()
 	out, err := exec.CommandContext(ctx,
 		"ffprobe", "-v", "quiet", "-print_format", "json", "-show_format", "-show_streams", mediaPath,
 	).CombinedOutput()
 	if ctx.Err() == context.DeadlineExceeded {
 		return NormalizationResult{Valid: false, Errors: []string{"ffprobe timed out"}}
 	}
 	if err != nil {
 		return NormalizationResult{Valid: false, Errors: []string{fmt.Sprintf("ffprobe failed: %v (%s)", err, strings.TrimSpace(string(out)))}}
 	}
 	var probe struct {
 		Streams []struct {
 			CodecName  string `json:"codec_name"`
 			CodecType  string `json:"codec_type"`
 			Width      int    `json:"width"`
 			Height     int    `json:"height"`
 			RFrameRate string `json:"r_frame_rate"`
 			PixFmt     string `json:"pix_fmt"`
 			SampleRate string `json:"sample_rate"`
 		} `json:"streams"`
 	}
 	if err := json.Unmarshal(out, &probe); err != nil {
 		return NormalizationResult{Valid: false, Errors: []string{"ffprobe JSON parse failed: " + err.Error()}}
 	}
 	var hasVideo, hasAudio bool
 	for _, s := range probe.Streams {
 		switch s.CodecType {
 		case "video":
 			hasVideo = true
 			if s.CodecName != "h264" {
 				result.Errors = append(result.Errors, fmt.Sprintf("video codec must be h264, got %s", s.CodecName))
 			}
 			if s.RFrameRate != "30/1" {
 				result.Errors = append(result.Errors, fmt.Sprintf("framerate must be 30 fps constant, got %s", s.RFrameRate))
 			}
 			if s.Width != 1280 && s.Width != 1920 {
 				result.Errors = append(result.Errors, fmt.Sprintf("width must be 1280 or 1920, got %d", s.Width))
 			}
 			if s.Height != 720 && s.Height != 1080 {
 				result.Errors = append(result.Errors, fmt.Sprintf("height must be 720 or 1080, got %d", s.Height))
 			}
 			if s.PixFmt != "yuv420p" {
 				result.Errors = append(result.Errors, fmt.Sprintf("pixel format must be yuv420p, got %s", s.PixFmt))
 			}
 		case "audio":
 			hasAudio = true
 			if s.CodecName != "aac" {
 				result.Errors = append(result.Errors, fmt.Sprintf("audio codec must be aac, got %s", s.CodecName))
 			}
 			if s.SampleRate != "48000" {
 				result.Errors = append(result.Errors, fmt.Sprintf("sample rate must be 48000 Hz, got %s", s.SampleRate))
 			}
 		}
 	}
 	if !hasVideo {
 		result.Errors = append(result.Errors, "no video stream found")
 	}
 	if !hasAudio {
 		result.Errors = append(result.Errors, "no audio stream found")
 	}
 	if len(result.Errors) > 0 {
 		result.Valid = false
 	}
 	return result
 }
 // ProbeDurationSeconds returns the duration of a media file in seconds.
 func ProbeDurationSeconds(mediaPath string) (int, error) {
 	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
 	defer cancel()
 	out, err := exec.CommandContext(
 		ctx,
 		"ffprobe",
 		"-v", "error",
 		"-show_entries", "format=duration",
 		"-of", "default=noprint_wrappers=1:nokey=1",
 		mediaPath,
 	).CombinedOutput()
 	if ctx.Err() == context.DeadlineExceeded {
 		return 0, fmt.Errorf("ffprobe timed out")
 	}
 	if err != nil {
 		return 0, fmt.Errorf("ffprobe failed: %w (%s)", err, strings.TrimSpace(string(out)))
 	}
 	rawDuration := strings.TrimSpace(string(out))
 	if rawDuration == "" {
 		return 0, fmt.Errorf("ffprobe returned empty duration")
 	}
 	secondsFloat, err := strconv.ParseFloat(rawDuration, 64)
 	if err != nil {
 		return 0, fmt.Errorf("failed to parse duration %q: %w", rawDuration, err)
 	}
 	if secondsFloat < 0 {
 		secondsFloat = 0
 	}
 	seconds := int(secondsFloat + 0.5)
 	if secondsFloat > 0 && seconds == 0 {
 		seconds = 1
 	}
 	return seconds, nil
 }
 // Media status values (ADR-006 media library states).
 const (
 	StatusReady               = "ready"
 	StatusNeedsNormalization  = "needs_normalization"
 	StatusNormalizing         = "normalizing"
 	StatusNormalizationFailed = "normalization_failed"
 )
 // runCommand executes an external command and returns its combined output on failure.
 // It is a package variable so tests can substitute a stub.
 var runCommand = func(ctx context.Context, name string, args ...string) error {
 	out, err := exec.CommandContext(ctx, name, args...).CombinedOutput()
 	if err != nil {
 		return fmt.Errorf("%s failed: %v (%s)", name, err, strings.TrimSpace(string(out)))
 	}
 	return nil
 }
 // normalizationArgs builds the ffmpeg arguments for the Linear Void normalization profile.
 func normalizationArgs(srcPath, dstPath string) []string {
 	return []string{
 		"-y",
 		"-i", srcPath,
 		"-map", "0:v:0", "-map", "0:a:0?",
 		"-vf", "scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2,fps=30,format=yuv420p",
 		"-c:v", "libx264", "-preset", "medium", "-crf", "21",
 		"-pix_fmt", "yuv420p",
 		"-r", "30", "-g", "60", "-keyint_min", "60", "-sc_threshold", "0",
 		"-c:a", "aac", "-b:a", "160k", "-ar", "48000", "-ac", "2",
 		"-avoid_negative_ts", "make_zero", "-max_muxing_queue_size", "1024",
 		"-movflags", "+faststart",
 		dstPath,
 	}
 }
 // normalizeVideo transcodes srcPath to the Linear Void normalization profile,
 // re-verifies the output with ffprobe, and returns its duration (seconds) and size (bytes).
 func normalizeVideo(srcPath, dstPath string) (int, int64, error) {
 	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Hour)
 	defer cancel()
 	if err := runCommand(ctx, "ffmpeg", normalizationArgs(srcPath, dstPath)...); err != nil {
 		return 0, 0, err
 	}
 	if res := ValidateNormalization(dstPath); !res.Valid {
 		return 0, 0, fmt.Errorf("normalized output failed validation: %s", strings.Join(res.Errors, "; "))
 	}
 	duration, err := ProbeDurationSeconds(dstPath)
 	if err != nil {
 		return 0, 0, fmt.Errorf("probe duration failed: %w", err)
 	}
 	info, err := os.Stat(dstPath)
 	if err != nil {
 		return 0, 0, fmt.Errorf("stat output failed: %w", err)
 	}
 	return duration, info.Size(), nil
 }
 // NormalizeVideo is the injectable normalization entry point.
 var NormalizeVideo = normalizeVideo
 // DetectMime reads the first 512 bytes of a file to detect its MIME type.
 func DetectMime(filePath string) (string, error) {
 	f, err := os.Open(filePath)
 	if err != nil {
 		return "", err
 	}
 	defer f.Close()
 	head := make([]byte, 512)
 	n, err := f.Read(head)
 	if err != nil && err != io.EOF {
 		return "", err
 	}
 	return strings.SplitN(http.DetectContentType(head[:n]), ";", 2)[0], nil
 }
 // IsAllowedExtension checks if the file extension is a supported video format.
 func IsAllowedExtension(fileName string) bool {
 	ext := strings.ToLower(filepath.Ext(fileName))
 	switch ext {
 	case ".mp4", ".mov", ".mkv", ".webm", ".m4v", ".ts":
 		return true
 	default:
 		return false
 	}
 }
 // IsAllowedMime checks if the MIME type is a supported video type.
 func IsAllowedMime(mime string) bool {
 	mime = strings.TrimSpace(strings.ToLower(mime))
 	if mime == "" {
 		return true
 	}
 	if strings.HasPrefix(mime, "video/") {
 		return true
 	}
 	return mime == "application/octet-stream"
 }
 // UniqueTargetPath returns a unique file path in mediaDir, appending -N if needed.
 func UniqueTargetPath(mediaDir, fileName string) string {
 	baseName := filepath.Base(fileName)
 	ext := filepath.Ext(baseName)
 	nameOnly := strings.TrimSuffix(baseName, ext)
 	candidate := filepath.Join(mediaDir, baseName)
 	for i := 1; ; i++ {
 		if _, err := os.Stat(candidate); os.IsNotExist(err) {
 			return candidate
 		}
 		candidate = filepath.Join(mediaDir, fmt.Sprintf("%s-%d%s", nameOnly, i, ext))
 	}
 }
 // FileEntry represents a media file for API responses.
 type FileEntry struct {
 	ID              uint   `json:"id"`
 	Name            string `json:"name"`
 	OriginalName    string `json:"originalName"`
 	Path            string `json:"path"`
 	Size            int64  `json:"size"`
 	DurationSeconds int    `json:"durationSeconds"`
 	Runtime         string `json:"runtime"`
 	Status          string `json:"status"`
 	Title           string `json:"title"`
 	Tags            string `json:"tags"`
 	UploadedAt      string `json:"uploadedAt"`
 	ModifiedAt      string `json:"modifiedAt"`
 }
 // MediaRecord is the interface for media DB records.
 type MediaRecord interface {
 	GetID() uint
 	GetFilename() string
 	GetOriginalName() string
 	GetPath() string
 	GetSizeBytes() int64
 	GetDurationSeconds() int
 	GetStatus() string
 	GetTitle() string
 	GetTags() string
 	GetUploadedAt() time.Time
 	GetUpdatedAt() time.Time
 }
 // ListFiles returns all media files sorted by upload date descending.
 func ListFiles(db *gorm.DB) ([]FileEntry, error) {
 	type record struct {
 		ID              uint
 		Filename        string
 		OriginalName    string
 		Path            string
 		SizeBytes       int64
 		DurationSeconds int
 		Status          string
 		Title           string
 		Tags            string
 		UploadedAt      time.Time
 		UpdatedAt       time.Time
 	}
 	var records []record
 	if err := db.Table("media").Order("uploaded_at desc").Find(&records).Error; err != nil {
 		return nil, err
 	}
 	files := make([]FileEntry, 0, len(records))
 	for _, r := range records {
 		files = append(files, FileEntry{
 			ID:              r.ID,
 			Name:            r.Filename,
 			OriginalName:    r.OriginalName,
 			Path:            r.Path,
 			Size:            r.SizeBytes,
 			DurationSeconds: r.DurationSeconds,
 			Runtime:         FormatDuration(r.DurationSeconds),
 			Status:          r.Status,
 			Title:           r.Title,
 			Tags:            r.Tags,
 			UploadedAt:      r.UploadedAt.UTC().Format(time.RFC3339),
 			ModifiedAt:      r.UpdatedAt.UTC().Format(time.RFC3339),
 		})
 	}
 	sort.Slice(files, func(i, j int) bool {
 		if files[i].UploadedAt == files[j].UploadedAt {
 			return files[i].Name < files[j].Name
 		}
 		return files[i].UploadedAt > files[j].UploadedAt
 	})
 	return files, nil
 }
 // ParsePlaylistEntries parses playlist content into schedule entries.
 type ScheduleEntry struct {
 	Index           int    `json:"index"`
 	Path            string `json:"path"`
 	Label           string `json:"label"`
 	DurationSeconds int    `json:"durationSeconds"`
 	Runtime         string `json:"runtime"`
 	Status          string `json:"status"`
 	Title           string `json:"title"`
 }
 // ParsePlaylist parses playlist text content into entries.
 func ParsePlaylist(content string) []ScheduleEntry {
 	entries := []ScheduleEntry{}
 	lines := strings.Split(content, "\n")
 	for _, rawLine := range lines {
 		line := strings.TrimSpace(rawLine)
 		if line == "" || strings.HasPrefix(line, "#") {
 			continue
 		}
 		if strings.HasPrefix(line, "file ") {
 			line = strings.TrimSpace(strings.TrimPrefix(line, "file "))
 			line = strings.Trim(line, "'\"")
 		}
 		entries = append(entries, ScheduleEntry{
 			Index: len(entries) + 1,
 			Path:  line,
 			Label: filepath.Base(line),
 		})
 	}
 	return entries
 }
 // UploadSessionDir returns the directory for an upload session's chunks.
 func UploadSessionDir(mediaDir, uploadID string) string {
 	return filepath.Join(mediaDir, ".uploads", uploadID)
 }
 // UploadSessionMetaPath returns the path to the session metadata file.
 func UploadSessionMetaPath(mediaDir, uploadID string) string {
 	return filepath.Join(UploadSessionDir(mediaDir, uploadID), "session.json")
 }
 // UploadChunkPath returns the path for a specific chunk file.
 func UploadChunkPath(mediaDir, uploadID string, chunkIndex int) string {
 	return filepath.Join(UploadSessionDir(mediaDir, uploadID), fmt.Sprintf("chunk-%06d.part", chunkIndex))
 }
 // CountUploadedChunks counts how many chunks exist for a session.
 func CountUploadedChunks(mediaDir, uploadID string, totalChunks int) int {
 	uploaded := 0
 	for i := 0; i < totalChunks; i++ {
 		if _, err := os.Stat(UploadChunkPath(mediaDir, uploadID, i)); err == nil {
 			uploaded++
 		}
 	}
 	return uploaded
 }
 // ValidateUploadID checks that an upload ID is a valid hex string of appropriate length.
 func ValidateUploadID(uploadID string) bool {
 	if len(uploadID) < 16 || len(uploadID) > 128 {
 		return false
 	}
 	for _, r := range uploadID {
 		if (r < 'a' || r > 'f') && (r < '0' || r > '9') {
 			return false
 		}
 	}
 	return true
 }
 // GetMediaIDFromPath extracts a media ID from a URL path like /api/admin/media/123.
 func GetMediaIDFromPath(path, prefix string) (uint, error) {
 	if !strings.HasPrefix(path, prefix) {
 		return 0, fmt.Errorf("invalid media path")
 	}
 	idPart := strings.TrimPrefix(path, prefix)
 	idPart = strings.TrimSpace(idPart)
 	if idPart == "" || strings.Contains(idPart, "/") {
 		return 0, fmt.Errorf("invalid media id")
 	}
 	id, err := strconv.ParseUint(idPart, 10, 64)
 	if err != nil || id == 0 {
 		return 0, fmt.Errorf("invalid media id")
 	}
 	return uint(id), nil
 }
@@ -0,0 +1,246 @@
 package media
 import (
 	"context"
 	"fmt"
 	"path/filepath"
 	"strings"
 	"testing"
 )
 func TestFormatDuration(t *testing.T) {
 	tests := []struct {
 		name     string
 		seconds  int
 		expected string
 	}{
 		{"zero", 0, "00:00:00"},
 		{"one second", 1, "00:00:01"},
 		{"one minute", 60, "00:01:00"},
 		{"one hour", 3600, "01:00:00"},
 		{"mixed", 3661, "01:01:01"},
 		{"large", 86399, "23:59:59"},
 		{"negative", -5, "00:00:00"},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			if got := FormatDuration(tt.seconds); got != tt.expected {
 				t.Errorf("FormatDuration(%d) = %q, want %q", tt.seconds, got, tt.expected)
 			}
 		})
 	}
 }
 func TestIsAllowedExtension(t *testing.T) {
 	tests := []struct {
 		name     string
 		expected bool
 	}{
 		{"video.mp4", true},
 		{"video.mov", true},
 		{"video.mkv", true},
 		{"video.webm", true},
 		{"video.m4v", true},
 		{"video.ts", true},
 		{"video.MP4", true},
 		{"video.avi", false},
 		{"video.flv", false},
 		{"video.wmv", false},
 		{"video", false},
 		{"", false},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			if got := IsAllowedExtension(tt.name); got != tt.expected {
 				t.Errorf("IsAllowedExtension(%q) = %v, want %v", tt.name, got, tt.expected)
 			}
 		})
 	}
 }
 func TestIsAllowedMime(t *testing.T) {
 	tests := []struct {
 		mime     string
 		expected bool
 	}{
 		{"video/mp4", true},
 		{"video/quicktime", true},
 		{"video/x-matroska", true},
 		{"video/webm", true},
 		{"application/octet-stream", true},
 		{"", true},
 		{"image/jpeg", false},
 		{"audio/mpeg", false},
 		{"text/plain", false},
 	}
 	for _, tt := range tests {
 		t.Run(tt.mime, func(t *testing.T) {
 			if got := IsAllowedMime(tt.mime); got != tt.expected {
 				t.Errorf("IsAllowedMime(%q) = %v, want %v", tt.mime, got, tt.expected)
 			}
 		})
 	}
 }
 func TestValidateUploadID(t *testing.T) {
 	tests := []struct {
 		id       string
 		expected bool
 	}{
 		{"abcdef0123456789", true},           // 16 hex chars
 		{"abcdef0123456789abcdef0123456789", true}, // 32 hex chars
 		{"abc", false},                        // too short
 		{"abcdef012345678", false},            // 15 chars (too short)
 		{"abcdef0123456789g", false},          // non-hex char
 		{"ABCDEF0123456789", false},           // uppercase (not allowed)
 		{"", false},
 	}
 	for _, tt := range tests {
 		t.Run(tt.id, func(t *testing.T) {
 			if got := ValidateUploadID(tt.id); got != tt.expected {
 				t.Errorf("ValidateUploadID(%q) = %v, want %v", tt.id, got, tt.expected)
 			}
 		})
 	}
 }
 func TestParsePlaylist(t *testing.T) {
 	tests := []struct {
 		name     string
 		content  string
 		expected int
 		first    string
 	}{
 		{
 			name:     "simple",
 			content:  "/videos/video1.mp4\n/videos/video2.mp4\n",
 			expected: 2,
 			first:    "/videos/video1.mp4",
 		},
 		{
 			name:     "with file prefix",
 			content:  "file /videos/video1.mp4\nfile '/videos/video2.mp4'\n",
 			expected: 2,
 			first:    "/videos/video1.mp4",
 		},
 		{
 			name:     "with comments and blanks",
 			content:  "# comment\n\n/videos/video1.mp4\n\n# another comment\n/videos/video2.mp4\n",
 			expected: 2,
 			first:    "/videos/video1.mp4",
 		},
 		{
 			name:     "empty",
 			content:  "",
 			expected: 0,
 		},
 		{
 			name:     "only comments",
 			content:  "# comment\n# another\n",
 			expected: 0,
 		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			entries := ParsePlaylist(tt.content)
 			if len(entries) != tt.expected {
 				t.Errorf("ParsePlaylist() len = %d, want %d", len(entries), tt.expected)
 			}
 			if tt.expected > 0 && entries[0].Path != tt.first {
 				t.Errorf("ParsePlaylist()[0].Path = %q, want %q", entries[0].Path, tt.first)
 			}
 			// Check indices
 			for i, e := range entries {
 				if e.Index != i+1 {
 					t.Errorf("ParsePlaylist()[%d].Index = %d, want %d", i, e.Index, i+1)
 				}
 			}
 		})
 	}
 }
 func TestGetMediaIDFromPath(t *testing.T) {
 	tests := []struct {
 		path      string
 		prefix    string
 		expected  uint
 		expectErr bool
 	}{
 		{"/api/admin/media/123", "/api/admin/media/", 123, false},
 		{"/api/admin/media/1", "/api/admin/media/", 1, false},
 		{"/api/admin/media/", "/api/admin/media/", 0, true},
 		{"/api/admin/media/abc", "/api/admin/media/", 0, true},
 		{"/api/admin/media/0", "/api/admin/media/", 0, true},
 		{"/other/path", "/api/admin/media/", 0, true},
 	}
 	for _, tt := range tests {
 		t.Run(tt.path, func(t *testing.T) {
 			id, err := GetMediaIDFromPath(tt.path, tt.prefix)
 			if tt.expectErr && err == nil {
 				t.Errorf("GetMediaIDFromPath(%q) expected error, got nil", tt.path)
 			}
 			if !tt.expectErr && err != nil {
 				t.Errorf("GetMediaIDFromPath(%q) error = %v", tt.path, err)
 			}
 			if id != tt.expected {
 				t.Errorf("GetMediaIDFromPath(%q) = %d, want %d", tt.path, id, tt.expected)
 			}
 		})
 	}
 }
 func TestUniqueTargetPath(t *testing.T) {
 	// Test that the function returns a path with the mediaDir prefix
 	// and the correct filename. We can't easily test collision behavior
 	// without filesystem setup, but we can verify the basic path.
 	expected := filepath.Join("/tmp/media", "video.mp4")
 	path := UniqueTargetPath("/tmp/media", "video.mp4")
 	if path != expected {
 		t.Errorf("UniqueTargetPath() = %q, want %q", path, expected)
 	}
 }
 func TestNormalizationArgs(t *testing.T) {
 	args := normalizationArgs("/in/movie.mov", "/out/movie.normalized.mp4")
 	joined := strings.Join(args, " ")
 	for _, want := range []string{
 		"-map 0:v:0",
 		"-map 0:a:0?",
 		"-c:v libx264",
 		"-r 30",
 		"-g 60",
 		"-keyint_min 60",
 		"-pix_fmt yuv420p",
 		"-c:a aac",
 		"-ar 48000",
 		"-ac 2",
 		"-avoid_negative_ts make_zero",
 		"/out/movie.normalized.mp4",
 	} {
 		if !strings.Contains(joined, want) {
 			t.Errorf("normalization args missing %q: %v", want, args)
 		}
 	}
 }
 func TestNormalizeVideo_FFmpegError(t *testing.T) {
 	origRun := runCommand
 	t.Cleanup(func() { runCommand = origRun })
 	runCommand = func(ctx context.Context, name string, args ...string) error {
 		if name != "ffmpeg" {
 			t.Errorf("runCommand name = %q, want ffmpeg", name)
 		}
 		return fmt.Errorf("simulated ffmpeg failure")
 	}
 	if _, _, err := normalizeVideo("/in/a.mov", "/out/a.normalized.mp4"); err == nil {
 		t.Fatal("expected error when ffmpeg fails")
 	}
 }
@@ -0,0 +1,278 @@
 package metrics
 import (
 	"context"
 	"fmt"
 	"math"
 	"net/http"
 	"strconv"
 	"strings"
 	"sync"
 	"time"
 	"gorm.io/gorm"
 	"chat/src/auth"
 	"chat/src/db"
 	"chat/src/ws"
 )
 var requestDurationBuckets = []float64{0.05, 0.1, 0.25, 0.5, 1, 2, 5}
 var chatRequestDurationHistogram = newRequestDurationHistogram(requestDurationBuckets)
 type requestDurationHistogram struct {
 	mu     sync.Mutex
 	buckets []float64
 	counts  []uint64
 	sum     float64
 	total   uint64
 }
 func newRequestDurationHistogram(buckets []float64) *requestDurationHistogram {
 	return &requestDurationHistogram{
 		buckets: append([]float64(nil), buckets...),
 		counts:  make([]uint64, len(buckets)+1),
 	}
 }
 func (h *requestDurationHistogram) observe(durationSeconds float64) {
 	h.mu.Lock()
 	defer h.mu.Unlock()
 	h.total++
 	h.sum += durationSeconds
 	for index, bucket := range h.buckets {
 		if durationSeconds <= bucket {
 			h.counts[index]++
 			return
 		}
 	}
 	h.counts[len(h.counts)-1]++
 }
 func (h *requestDurationHistogram) snapshot() (counts []uint64, sum float64, total uint64) {
 	h.mu.Lock()
 	defer h.mu.Unlock()
 	counts = append([]uint64(nil), h.counts...)
 	return counts, h.sum, h.total
 }
 // ObserveRequestDuration records a chat HTTP request duration in seconds.
 func ObserveRequestDuration(duration time.Duration) {
 	chatRequestDurationHistogram.observe(duration.Seconds())
 }
 // WrapRequestTiming records request duration for the provided handler.
 func WrapRequestTiming(next http.HandlerFunc) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		startedAt := time.Now()
 		defer func() { ObserveRequestDuration(time.Since(startedAt)) }()
 		next(w, r)
 	}
 }
 // HandleMetrics returns Prometheus-format metrics for the chat service.
 func HandleMetrics(gormDB *gorm.DB, redis db.RedisClient, hub *ws.Hub, sessionStore *auth.SessionStore, dbDriver, instanceID string) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		if r.Method != http.MethodGet {
 			http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
 			return
 		}
 		var storedMessages int64
 		if gormDB != nil {
 			_ = gormDB.Model(&db.Message{}).Count(&storedMessages).Error
 		}
 		var moderationActions int64
 		if gormDB != nil {
 			_ = gormDB.Model(&db.ModerationLog{}).Count(&moderationActions).Error
 		}
 		redisEnabled := 0
 		redisUp := 0
 		redisClients := 0
 		redisMemoryUsedBytes := int64(0)
 		redisMemoryMaxBytes := int64(0)
 		redisMemoryUsageRatio := 0.0
 		if redis != nil {
 			redisEnabled = 1
 			if err := redis.Ping(context.Background()); err == nil {
 				redisUp = 1
 				if info, err := redis.Info(context.Background(), "clients"); err == nil {
 					for _, line := range strings.Split(info, "\n") {
 						if strings.HasPrefix(line, "connected_clients:") {
 							if value, err := strconv.Atoi(strings.TrimSpace(strings.TrimPrefix(line, "connected_clients:"))); err == nil {
 								redisClients = value
 							}
 							break
 						}
 					}
 				}
 				if info, err := redis.Info(context.Background(), "memory"); err == nil {
 					if value := parseRedisMemoryBytes(info, "used_memory_human"); value > 0 {
 						redisMemoryUsedBytes = value
 					}
 					if value := parseRedisMemoryBytes(info, "maxmemory_human"); value > 0 {
 						redisMemoryMaxBytes = value
 					} else if value := parseRedisMemoryBytes(info, "maxmemory"); value > 0 {
 						redisMemoryMaxBytes = value
 					}
 					if redisMemoryMaxBytes > 0 {
 						redisMemoryUsageRatio = math.Min(float64(redisMemoryUsedBytes)/float64(redisMemoryMaxBytes), 1.0)
 					}
 				}
 			}
 		}
 		connectedClients := 0
 		dmsSent := int64(0)
 		if hub != nil {
 			connectedClients = hub.ConnectedClients()
 			dmsSent = hub.DMsSent
 		}
 		activeSessions := 0
 		if sessionStore != nil {
 			activeSessions = sessionStore.CountActive()
 		}
 		w.Header().Set("Content-Type", "text/plain; version=0.0.4; charset=utf-8")
 		writeLine := func(name string, value any) {
 			fmt.Fprintf(w, "%s %v\n", name, value)
 		}
 		fmt.Fprintln(w, "# HELP linearvoid_chat_connected_clients Current connected WebSocket clients.")
 		fmt.Fprintln(w, "# TYPE linearvoid_chat_connected_clients gauge")
 		writeLine("linearvoid_chat_connected_clients", connectedClients)
 		fmt.Fprintln(w, "# HELP linearvoid_chat_messages_total Total stored chat messages.")
 		fmt.Fprintln(w, "# TYPE linearvoid_chat_messages_total gauge")
 		writeLine("linearvoid_chat_messages_total", storedMessages)
 		fmt.Fprintln(w, "# HELP linearvoid_chat_dms_total Total private messages sent.")
 		fmt.Fprintln(w, "# TYPE linearvoid_chat_dms_total counter")
 		writeLine("linearvoid_chat_dms_total", dmsSent)
 		fmt.Fprintln(w, "# HELP linearvoid_chat_moderation_actions_total Total moderation log entries.")
 		fmt.Fprintln(w, "# TYPE linearvoid_chat_moderation_actions_total gauge")
 		writeLine("linearvoid_chat_moderation_actions_total", moderationActions)
 		fmt.Fprintln(w, "# HELP linearvoid_chat_redis_enabled Redis configured for chat service.")
 		fmt.Fprintln(w, "# TYPE linearvoid_chat_redis_enabled gauge")
 		writeLine("linearvoid_chat_redis_enabled", redisEnabled)
 		fmt.Fprintln(w, "# HELP linearvoid_chat_redis_up Redis reachable from chat service.")
 		fmt.Fprintln(w, "# TYPE linearvoid_chat_redis_up gauge")
 		writeLine("linearvoid_chat_redis_up", redisUp)
 		fmt.Fprintln(w, "# HELP linearvoid_chat_redis_connected_clients Redis connected client count seen by chat service.")
 		fmt.Fprintln(w, "# TYPE linearvoid_chat_redis_connected_clients gauge")
 		writeLine("linearvoid_chat_redis_connected_clients", redisClients)
 		fmt.Fprintln(w, "# HELP linearvoid_chat_redis_memory_used_bytes Redis used memory reported by INFO memory.")
 		fmt.Fprintln(w, "# TYPE linearvoid_chat_redis_memory_used_bytes gauge")
 		writeLine("linearvoid_chat_redis_memory_used_bytes", redisMemoryUsedBytes)
 		fmt.Fprintln(w, "# HELP linearvoid_chat_redis_memory_max_bytes Redis maxmemory limit reported by INFO memory.")
 		fmt.Fprintln(w, "# TYPE linearvoid_chat_redis_memory_max_bytes gauge")
 		writeLine("linearvoid_chat_redis_memory_max_bytes", redisMemoryMaxBytes)
 		fmt.Fprintln(w, "# HELP linearvoid_chat_redis_memory_usage_ratio Redis memory usage ratio (used / max).")
 		fmt.Fprintln(w, "# TYPE linearvoid_chat_redis_memory_usage_ratio gauge")
 		writeLine("linearvoid_chat_redis_memory_usage_ratio", redisMemoryUsageRatio)
 		fmt.Fprintln(w, "# HELP linearvoid_chat_admin_sessions_active Active unexpired admin sessions.")
 		fmt.Fprintln(w, "# TYPE linearvoid_chat_admin_sessions_active gauge")
 		writeLine("linearvoid_chat_admin_sessions_active", activeSessions)
 		fmt.Fprintln(w, "# HELP linearvoid_chat_build_info Static build info for chat service.")
 		fmt.Fprintln(w, "# TYPE linearvoid_chat_build_info gauge")
 		fmt.Fprintf(w, "linearvoid_chat_build_info{service=\"chat\",database_driver=\"%s\",instance_id=\"%s\"} 1\n", dbDriver, instanceID)
 		counts, sum, total := chatRequestDurationHistogram.snapshot()
 		fmt.Fprintln(w, "# HELP linearvoid_chat_request_duration_seconds HTTP request duration for chat API handlers.")
 		fmt.Fprintln(w, "# TYPE linearvoid_chat_request_duration_seconds histogram")
 		cumulative := uint64(0)
 		for index, bucket := range requestDurationBuckets {
 			cumulative += counts[index]
 			fmt.Fprintf(w, "linearvoid_chat_request_duration_seconds_bucket{le=\"%g\"} %d\n", bucket, cumulative)
 		}
 		cumulative += counts[len(counts)-1]
 		fmt.Fprintf(w, "linearvoid_chat_request_duration_seconds_bucket{le=\"+Inf\"} %d\n", cumulative)
 		fmt.Fprintf(w, "linearvoid_chat_request_duration_seconds_sum %g\n", sum)
 		fmt.Fprintf(w, "linearvoid_chat_request_duration_seconds_count %d\n", total)
 	}
 }
 // HandleHealth returns a simple health check endpoint.
 func HandleHealth() http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Type", "application/json")
 		w.WriteHeader(http.StatusOK)
 		fmt.Fprint(w, `{"status":"healthy","service":"chat","timestamp":"`+time.Now().UTC().Format(time.RFC3339)+`"}`)
 	}
 }
 // HandleNotFound returns a 404 JSON response for all unhandled paths.
 func HandleNotFound() http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Type", "application/json")
 		w.WriteHeader(http.StatusNotFound)
 		fmt.Fprint(w, `{"error":"not found"}`)
 	}
 }
 func parseRedisMemoryBytes(info, key string) int64 {
 	for _, line := range strings.Split(info, "\n") {
 		if !strings.HasPrefix(line, key+":") {
 			continue
 		}
 		value := strings.TrimSpace(strings.TrimPrefix(line, key+":"))
 		if value == "" {
 			return 0
 		}
 		if raw, err := strconv.ParseInt(value, 10, 64); err == nil {
 			return raw
 		}
 		return parseHumanBytes(value)
 	}
 	return 0
 }
 func parseHumanBytes(value string) int64 {
 	value = strings.TrimSpace(strings.ToUpper(value))
 	if value == "" {
 		return 0
 	}
 	multiplier := float64(1)
 	suffixes := map[string]float64{
 		"B": 1,
 		"K": 1024,
 		"KB": 1024,
 		"M": 1024 * 1024,
 		"MB": 1024 * 1024,
 		"G": 1024 * 1024 * 1024,
 		"GB": 1024 * 1024 * 1024,
 		"T": 1024 * 1024 * 1024 * 1024,
 		"TB": 1024 * 1024 * 1024 * 1024,
 	}
 	for suffix, factor := range suffixes {
 		if strings.HasSuffix(value, suffix) {
 			multiplier = factor
 			value = strings.TrimSpace(strings.TrimSuffix(value, suffix))
 			break
 		}
 	}
 	parsed, err := strconv.ParseFloat(value, 64)
 	if err != nil {
 		return 0
 	}
 	return int64(parsed * multiplier)
 }
@@ -0,0 +1,216 @@
 package metrics
 import (
 	"context"
 	"net/http"
 	"net/http/httptest"
 	"strings"
 	"testing"
 	"time"
 	"github.com/glebarez/sqlite"
 	"gorm.io/gorm"
 	"chat/src/auth"
 	"chat/src/db"
 	"chat/src/ws"
 )
 func TestHandleHealth(t *testing.T) {
 	handler := HandleHealth()
 	req := httptest.NewRequest("GET", "/health", nil)
 	w := httptest.NewRecorder()
 	handler(w, req)
 	if w.Code != http.StatusOK {
 		t.Errorf("status = %d, want 200", w.Code)
 	}
 	body := w.Body.String()
 	if !strings.Contains(body, `"healthy"`) {
 		t.Errorf("body missing healthy: %s", body)
 	}
 	if !strings.Contains(body, `"chat"`) {
 		t.Errorf("body missing service name: %s", body)
 	}
 }
 func TestHandleNotFound(t *testing.T) {
 	handler := HandleNotFound()
 	req := httptest.NewRequest("GET", "/nonexistent", nil)
 	w := httptest.NewRecorder()
 	handler(w, req)
 	if w.Code != http.StatusNotFound {
 		t.Errorf("status = %d, want 404", w.Code)
 	}
 	body := w.Body.String()
 	if !strings.Contains(body, `"not found"`) {
 		t.Errorf("body missing not found: %s", body)
 	}
 }
 func TestHandleMetrics(t *testing.T) {
 	chatRequestDurationHistogram = newRequestDurationHistogram(requestDurationBuckets)
 	ObserveRequestDuration(100 * time.Millisecond)
 	ObserveRequestDuration(750 * time.Millisecond)
 	gormDB, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
 	if err != nil {
 		t.Fatalf("failed to open test DB: %v", err)
 	}
 	gormDB.AutoMigrate(&db.Message{}, &db.ModerationLog{})
 	// Add some test data
 	gormDB.Create(&db.Message{Room: "main", Username: "u1", Text: "hi", Timestamp: time.Now(), Type: "public"})
 	gormDB.Create(&db.ModerationLog{Action: "mute", Target: "u2", Moderator: "admin", Reason: "spam", Timestamp: time.Now()})
 	sessionStore := auth.NewSessionStore()
 	hub := ws.NewHub(gormDB, nil, "test-instance", 10, 10*time.Second, "admin")
 	hub.DMsSent = 5
 	handler := HandleMetrics(gormDB, nil, hub, sessionStore, "sqlite", "test-instance")
 	req := httptest.NewRequest("GET", "/metrics", nil)
 	w := httptest.NewRecorder()
 	handler(w, req)
 	if w.Code != http.StatusOK {
 		t.Errorf("status = %d, want 200", w.Code)
 	}
 	body := w.Body.String()
 	// Check required metric names
 	requiredMetrics := []string{
 		"linearvoid_chat_connected_clients",
 		"linearvoid_chat_messages_total",
 		"linearvoid_chat_dms_total",
 		"linearvoid_chat_moderation_actions_total",
 		"linearvoid_chat_redis_enabled",
 		"linearvoid_chat_redis_up",
 		"linearvoid_chat_redis_connected_clients",
 		"linearvoid_chat_redis_memory_used_bytes",
 		"linearvoid_chat_redis_memory_max_bytes",
 		"linearvoid_chat_redis_memory_usage_ratio",
 		"linearvoid_chat_admin_sessions_active",
 		"linearvoid_chat_build_info",
 		"linearvoid_chat_request_duration_seconds",
 	}
 	for _, metric := range requiredMetrics {
 		if !strings.Contains(body, metric) {
 			t.Errorf("body missing metric %s", metric)
 		}
 	}
 	// Check build_info has instance_id label
 	if !strings.Contains(body, `instance_id="test-instance"`) {
 		t.Error("build_info missing instance_id label")
 	}
 	// Check values
 	if !strings.Contains(body, "linearvoid_chat_messages_total 1") {
 		t.Error("messages_total should be 1")
 	}
 	if !strings.Contains(body, "linearvoid_chat_moderation_actions_total 1") {
 		t.Error("moderation_actions_total should be 1")
 	}
 	if !strings.Contains(body, "linearvoid_chat_dms_total 5") {
 		t.Error("dms_total should be 5")
 	}
 	if !strings.Contains(body, "linearvoid_chat_redis_enabled 0") {
 		t.Error("redis_enabled should be 0 (nil redis)")
 	}
 	if !strings.Contains(body, "linearvoid_chat_request_duration_seconds_bucket{le=\"1\"} 2") {
 		t.Error("request duration histogram should include both observed samples by the 1s bucket")
 	}
 	if !strings.Contains(body, "linearvoid_chat_request_duration_seconds_count 2") {
 		t.Error("request duration count should be 2")
 	}
 }
 func TestHandleMetrics_WrongMethod(t *testing.T) {
 	handler := HandleMetrics(nil, nil, nil, nil, "", "")
 	req := httptest.NewRequest("POST", "/metrics", nil)
 	w := httptest.NewRecorder()
 	handler(w, req)
 	if w.Code != http.StatusMethodNotAllowed {
 		t.Errorf("status = %d, want 405", w.Code)
 	}
 }
 func TestHandleMetrics_WithRedis(t *testing.T) {
 	chatRequestDurationHistogram = newRequestDurationHistogram(requestDurationBuckets)
 	ObserveRequestDuration(250 * time.Millisecond)
 	gormDB, _ := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
 	gormDB.AutoMigrate(&db.Message{}, &db.ModerationLog{})
 	// mockRedis for metrics test
 	mr := &metricsMockRedis{}
 	sessionStore := auth.NewSessionStore()
 	hub := ws.NewHub(gormDB, mr, "test-instance", 10, 10*time.Second, "admin")
 	handler := HandleMetrics(gormDB, mr, hub, sessionStore, "sqlite", "inst-123")
 	req := httptest.NewRequest("GET", "/metrics", nil)
 	w := httptest.NewRecorder()
 	handler(w, req)
 	if w.Code != http.StatusOK {
 		t.Errorf("status = %d, want 200", w.Code)
 	}
 	body := w.Body.String()
 	if !strings.Contains(body, "linearvoid_chat_redis_enabled 1") {
 		t.Error("redis_enabled should be 1")
 	}
 	if !strings.Contains(body, "linearvoid_chat_redis_up 1") {
 		t.Error("redis_up should be 1")
 	}
 	if !strings.Contains(body, "linearvoid_chat_redis_connected_clients 5") {
 		t.Error("redis_connected_clients should be 5")
 	}
 	if !strings.Contains(body, "linearvoid_chat_redis_memory_used_bytes 1048576") {
 		t.Error("redis_memory_used_bytes should be 1048576")
 	}
 	if !strings.Contains(body, "linearvoid_chat_redis_memory_usage_ratio 1") {
 		t.Error("redis_memory_usage_ratio should be 1 when maxmemory is unavailable or equal to used memory in tests")
 	}
 	if !strings.Contains(body, "linearvoid_chat_request_duration_seconds_count 1") {
 		t.Error("request duration count should be 1")
 	}
 }
 // metricsMockRedis is a minimal mock for metrics tests.
 type metricsMockRedis struct{}
 func (m *metricsMockRedis) Ping(ctx context.Context) error { return nil }
 func (m *metricsMockRedis) Set(ctx context.Context, key string, value interface{}, expiration time.Duration) error {
 	return nil
 }
 func (m *metricsMockRedis) Get(ctx context.Context, key string) (string, error) { return "", nil }
 func (m *metricsMockRedis) Del(ctx context.Context, keys ...string) error       { return nil }
 func (m *metricsMockRedis) Incr(ctx context.Context, key string) (int64, error) { return 0, nil }
 func (m *metricsMockRedis) Decr(ctx context.Context, key string) (int64, error) { return 0, nil }
 func (m *metricsMockRedis) Expire(ctx context.Context, key string, expiration time.Duration) error {
 	return nil
 }
 func (m *metricsMockRedis) Exists(ctx context.Context, keys ...string) (int64, error) { return 0, nil }
 func (m *metricsMockRedis) Publish(ctx context.Context, channel string, message interface{}) error {
 	return nil
 }
 func (m *metricsMockRedis) PSubscribe(ctx context.Context, channels ...string) db.PubSub { return nil }
 func (m *metricsMockRedis) Scan(ctx context.Context, cursor uint64, match string, count int64) ([]string, uint64, error) {
 	return nil, 0, nil
 }
 func (m *metricsMockRedis) Info(ctx context.Context, sections ...string) (string, error) {
 	return "connected_clients:5\nused_memory_human:1M\nmaxmemory_human:1M\n", nil
 }
 func (m *metricsMockRedis) Close() error { return nil }
@@ -0,0 +1,75 @@
 package ratelimit
 import (
 	"context"
 	"fmt"
 	"time"
 )
 // RedisClient is the subset of Redis operations needed for rate limiting.
 type RedisClient interface {
 	Incr(ctx context.Context, key string) (int64, error)
 	Expire(ctx context.Context, key string, expiration time.Duration) error
 	Decr(ctx context.Context, key string) (int64, error)
 }
 // CheckMessageRate checks if a user has exceeded the message rate limit.
 // Returns true if allowed, false if rate limited.
 func CheckMessageRate(ctx context.Context, redis RedisClient, username string, max int, window time.Duration) (bool, error) {
 	if redis == nil {
 		return true, nil // No Redis = no rate limiting
 	}
 	key := fmt.Sprintf("rate:%s", username)
 	count, err := redis.Incr(ctx, key)
 	if err != nil {
 		return true, err // Fail open on Redis error
 	}
 	if count == 1 {
 		_ = redis.Expire(ctx, key, window)
 	}
 	return count <= int64(max), nil
 }
 // CheckLoginRate checks if an IP has exceeded the login attempt limit.
 // Returns true if allowed, false if rate limited.
 func CheckLoginRate(ctx context.Context, redis RedisClient, clientIP string) (bool, error) {
 	if redis == nil {
 		return true, nil
 	}
 	key := fmt.Sprintf("login_attempts:%s", clientIP)
 	count, err := redis.Incr(ctx, key)
 	if err != nil {
 		return true, err
 	}
 	if count == 1 {
 		_ = redis.Expire(ctx, key, 5*time.Minute)
 	}
 	return count <= 5, nil
 }
 // CheckWSConnRate checks if an IP has exceeded the WebSocket connection limit.
 // Returns true if allowed, false if rate limited.
 // Caller must call Decr on disconnect.
 func CheckWSConnRate(ctx context.Context, redis RedisClient, clientIP string) (bool, error) {
 	if redis == nil {
 		return true, nil
 	}
 	key := fmt.Sprintf("ws_conn:%s", clientIP)
 	count, err := redis.Incr(ctx, key)
 	if err != nil {
 		return true, err
 	}
 	if count == 1 {
 		_ = redis.Expire(ctx, key, 60*time.Second)
 	}
 	return count <= 5, nil
 }
 // DecrWSConn decrements the WebSocket connection counter for an IP.
 func DecrWSConn(ctx context.Context, redis RedisClient, clientIP string) {
 	if redis == nil {
 		return
 	}
 	key := fmt.Sprintf("ws_conn:%s", clientIP)
 	_, _ = redis.Decr(ctx, key)
 }
@@ -0,0 +1,190 @@
 package ratelimit
 import (
 	"context"
 	"sync"
 	"testing"
 	"time"
 )
 // mockRedis implements RedisClient for testing.
 type mockRedis struct {
 	mu    sync.Mutex
 	store map[string]int64
 }
 func newMockRedis() *mockRedis {
 	return &mockRedis{store: make(map[string]int64)}
 }
 func (m *mockRedis) Incr(ctx context.Context, key string) (int64, error) {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	m.store[key]++
 	return m.store[key], nil
 }
 func (m *mockRedis) Expire(ctx context.Context, key string, expiration time.Duration) error {
 	return nil
 }
 func (m *mockRedis) Decr(ctx context.Context, key string) (int64, error) {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	m.store[key]--
 	return m.store[key], nil
 }
 func TestCheckMessageRate(t *testing.T) {
 	redis := newMockRedis()
 	ctx := context.Background()
 	// First 10 messages allowed
 	for i := 0; i < 10; i++ {
 		allowed, err := CheckMessageRate(ctx, redis, "user1", 10, 10*time.Second)
 		if err != nil {
 			t.Fatalf("CheckMessageRate #%d error = %v", i+1, err)
 		}
 		if !allowed {
 			t.Errorf("CheckMessageRate #%d = false, want true", i+1)
 		}
 	}
 	// 11th message blocked
 	allowed, err := CheckMessageRate(ctx, redis, "user1", 10, 10*time.Second)
 	if err != nil {
 		t.Fatalf("CheckMessageRate #11 error = %v", err)
 	}
 	if allowed {
 		t.Error("CheckMessageRate #11 = true, want false (rate limited)")
 	}
 	// Different user not affected
 	allowed, err = CheckMessageRate(ctx, redis, "user2", 10, 10*time.Second)
 	if err != nil {
 		t.Fatalf("CheckMessageRate user2 error = %v", err)
 	}
 	if !allowed {
 		t.Error("CheckMessageRate user2 = false, want true")
 	}
 }
 func TestCheckMessageRate_NilRedis(t *testing.T) {
 	allowed, err := CheckMessageRate(context.Background(), nil, "user1", 10, 10*time.Second)
 	if err != nil {
 		t.Fatalf("CheckMessageRate nil redis error = %v", err)
 	}
 	if !allowed {
 		t.Error("CheckMessageRate nil redis = false, want true (fail open)")
 	}
 }
 func TestCheckLoginRate(t *testing.T) {
 	redis := newMockRedis()
 	ctx := context.Background()
 	// First 5 attempts allowed
 	for i := 0; i < 5; i++ {
 		allowed, err := CheckLoginRate(ctx, redis, "192.168.1.1")
 		if err != nil {
 			t.Fatalf("CheckLoginRate #%d error = %v", i+1, err)
 		}
 		if !allowed {
 			t.Errorf("CheckLoginRate #%d = false, want true", i+1)
 		}
 	}
 	// 6th attempt blocked
 	allowed, err := CheckLoginRate(ctx, redis, "192.168.1.1")
 	if err != nil {
 		t.Fatalf("CheckLoginRate #6 error = %v", err)
 	}
 	if allowed {
 		t.Error("CheckLoginRate #6 = true, want false (rate limited)")
 	}
 	// Different IP not affected
 	allowed, err = CheckLoginRate(ctx, redis, "10.0.0.1")
 	if err != nil {
 		t.Fatalf("CheckLoginRate other IP error = %v", err)
 	}
 	if !allowed {
 		t.Error("CheckLoginRate other IP = false, want true")
 	}
 }
 func TestCheckLoginRate_NilRedis(t *testing.T) {
 	allowed, err := CheckLoginRate(context.Background(), nil, "192.168.1.1")
 	if err != nil {
 		t.Fatalf("CheckLoginRate nil redis error = %v", err)
 	}
 	if !allowed {
 		t.Error("CheckLoginRate nil redis = false, want true (fail open)")
 	}
 }
 func TestCheckWSConnRate(t *testing.T) {
 	redis := newMockRedis()
 	ctx := context.Background()
 	// First 5 connections allowed
 	for i := 0; i < 5; i++ {
 		allowed, err := CheckWSConnRate(ctx, redis, "192.168.1.1")
 		if err != nil {
 			t.Fatalf("CheckWSConnRate #%d error = %v", i+1, err)
 		}
 		if !allowed {
 			t.Errorf("CheckWSConnRate #%d = false, want true", i+1)
 		}
 	}
 	// 6th connection blocked
 	allowed, err := CheckWSConnRate(ctx, redis, "192.168.1.1")
 	if err != nil {
 		t.Fatalf("CheckWSConnRate #6 error = %v", err)
 	}
 	if allowed {
 		t.Error("CheckWSConnRate #6 = true, want false (rate limited)")
 	}
 }
 func TestCheckWSConnRate_NilRedis(t *testing.T) {
 	allowed, err := CheckWSConnRate(context.Background(), nil, "192.168.1.1")
 	if err != nil {
 		t.Fatalf("CheckWSConnRate nil redis error = %v", err)
 	}
 	if !allowed {
 		t.Error("CheckWSConnRate nil redis = false, want true (fail open)")
 	}
 }
 func TestDecrWSConn(t *testing.T) {
 	redis := newMockRedis()
 	ctx := context.Background()
 	// Increment to 5
 	for i := 0; i < 5; i++ {
 		CheckWSConnRate(ctx, redis, "192.168.1.1")
 	}
 	// 6th should be blocked
 	allowed, _ := CheckWSConnRate(ctx, redis, "192.168.1.1")
 	if allowed {
 		t.Error("6th connection should be blocked")
 	}
 	// Decrement twice (simulate 2 disconnects)
 	DecrWSConn(ctx, redis, "192.168.1.1")
 	DecrWSConn(ctx, redis, "192.168.1.1")
 	// Now should be allowed again (counter 6→4, then incr→5)
 	allowed, _ = CheckWSConnRate(ctx, redis, "192.168.1.1")
 	if !allowed {
 		t.Error("after 2x DecrWSConn, connection should be allowed")
 	}
 }
 func TestDecrWSConn_NilRedis(t *testing.T) {
 	// Should not panic
 	DecrWSConn(context.Background(), nil, "192.168.1.1")
 }
@@ -0,0 +1,500 @@
 package ws
 import (
 	"context"
 	"encoding/json"
 	"fmt"
 	"log"
 	"net/http"
 	"strconv"
 	"strings"
 	"sync"
 	"time"
 	"github.com/gorilla/websocket"
 	"gorm.io/gorm"
 	"chat/src/db"
 	"chat/src/ratelimit"
 )
 // Upgrader is the WebSocket upgrader configuration.
 var Upgrader = websocket.Upgrader{
 	CheckOrigin: func(r *http.Request) bool { return true },
 }
 // ClientInfo stores metadata about a connected WebSocket client.
 type ClientInfo struct {
 	Username string
 	Room     string
 }
 // Hub manages all WebSocket connections and message routing.
 type Hub struct {
 	mu          sync.Mutex
 	clients     map[*websocket.Conn]bool
 	clientMeta  map[*websocket.Conn]ClientInfo
 	DB          *gorm.DB
 	Redis       db.RedisClient
 	InstanceID  string
 	RateLimitMax    int
 	RateLimitWindow time.Duration
 	AdminUsername   string
 	DMsSent         int64
 	presenceMu          sync.Mutex
 	presenceTimers      map[string]*time.Timer
 	PresenceGracePeriod time.Duration
 }
 // NewHub creates a new WebSocket hub.
 func NewHub(gormDB *gorm.DB, redis db.RedisClient, instanceID string, rateMax int, rateWindow time.Duration, adminUser string) *Hub {
 	return &Hub{
 		clients:            make(map[*websocket.Conn]bool),
 		clientMeta:         make(map[*websocket.Conn]ClientInfo),
 		DB:                 gormDB,
 		Redis:              redis,
 		InstanceID:         instanceID,
 		RateLimitMax:       rateMax,
 		RateLimitWindow:    rateWindow,
 		AdminUsername:      adminUser,
 		presenceTimers:     make(map[string]*time.Timer),
 		PresenceGracePeriod: 5 * time.Second,
 	}
 }
 // ConnectedClients returns the number of currently connected clients.
 func (h *Hub) ConnectedClients() int {
 	h.mu.Lock()
 	defer h.mu.Unlock()
 	return len(h.clients)
 }
 // Broadcast sends a message to all connected clients and persists to DB.
 // System messages (join/leave announcements, moderation notices) fan out but
 // are not persisted, so the chat-log table only holds real chat messages.
 func (h *Hub) Broadcast(msg db.Message) {
 	h.mu.Lock()
 	defer h.mu.Unlock()
 	// Persist to configured SQL backend (chat messages only).
 	if h.DB != nil && msg.Type != "system" {
 		h.DB.Create(&msg)
 	}
 	// Local fan-out
 	for client := range h.clients {
 		if err := client.WriteJSON(msg); err != nil {
 			client.Close()
 			delete(h.clients, client)
 			delete(h.clientMeta, client)
 		}
 	}
 	// Redis pub/sub for multi-instance fan-out
 	if h.Redis != nil && msg.Room != "" {
 		payload, _ := json.Marshal(map[string]any{
 			"instance": h.InstanceID,
 			"msg":      msg,
 		})
 		_ = h.Redis.Publish(context.Background(), fmt.Sprintf("room:%s:messages", msg.Room), payload)
 	}
 }
 // scheduleLeaveAnnouncement broadcasts a "left" message after a short grace
 // period so quick reconnects don't produce join/leave spam.
 func (h *Hub) scheduleLeaveAnnouncement(room, username string) {
 	key := room + "\x00" + username
 	h.presenceMu.Lock()
 	if h.presenceTimers == nil {
 		h.presenceTimers = make(map[string]*time.Timer)
 	}
 	grace := h.PresenceGracePeriod
 	if grace <= 0 {
 		grace = 5 * time.Second
 	}
 	h.presenceTimers[key] = time.AfterFunc(grace, func() {
 		h.presenceMu.Lock()
 		delete(h.presenceTimers, key)
 		h.presenceMu.Unlock()
 		h.Broadcast(db.Message{Room: room, Username: "system", Text: username + " left " + room, Type: "system", Timestamp: time.Now()})
 	})
 	h.presenceMu.Unlock()
 }
 // cancelLeaveAnnouncement cancels a pending "left" announcement for a
 // room+user and reports whether one existed (i.e. a reconnect within grace).
 func (h *Hub) cancelLeaveAnnouncement(room, username string) bool {
 	key := room + "\x00" + username
 	h.presenceMu.Lock()
 	defer h.presenceMu.Unlock()
 	if timer, ok := h.presenceTimers[key]; ok {
 		timer.Stop()
 		delete(h.presenceTimers, key)
 		return true
 	}
 	return false
 }
 // BroadcastTyping notifies other users in the room that a user is typing.
 func (h *Hub) BroadcastTyping(username, room string) {
 	h.mu.Lock()
 	defer h.mu.Unlock()
 	for conn, info := range h.clientMeta {
 		if info.Room == room && info.Username != username {
 			_ = conn.WriteJSON(db.Message{Room: room, Username: username, Text: "", Type: "typing", Timestamp: time.Now()})
 		}
 	}
 }
 // PushChatHistory sends the last N messages for a room via WebSocket.
 func (h *Hub) PushChatHistory(conn *websocket.Conn, room string, limit int) {
 	if h.DB == nil || room == "" {
 		return
 	}
 	var messages []db.Message
 	h.DB.Where("room = ? AND type <> ?", room, "system").Order("timestamp desc").Limit(limit).Find(&messages)
 	// Reverse to chronological order
 	for i := len(messages)/2 - 1; i >= 0; i-- {
 		opp := len(messages) - 1 - i
 		messages[i], messages[opp] = messages[opp], messages[i]
 	}
 	h.mu.Lock()
 	for _, msg := range messages {
 		conn.WriteJSON(msg)
 	}
 	h.mu.Unlock()
 }
 // HandleConnection handles a new WebSocket connection.
 func (h *Hub) HandleConnection(w http.ResponseWriter, r *http.Request) {
 	clientIP := r.Header.Get("X-Forwarded-For")
 	if clientIP == "" {
 		clientIP = r.RemoteAddr
 	}
 	// IP-based connection rate limiting
 	allowed, err := ratelimit.CheckWSConnRate(context.Background(), h.Redis, clientIP)
 	if err != nil {
 		log.Printf("WS rate limit check error: %v", err)
 	}
 	if !allowed {
 		http.Error(w, "too many connections from this IP", http.StatusTooManyRequests)
 		return
 	}
 	defer ratelimit.DecrWSConn(context.Background(), h.Redis, clientIP)
 	conn, err := Upgrader.Upgrade(w, r, nil)
 	if err != nil {
 		log.Println("Upgrade error:", err)
 		return
 	}
 	username := r.URL.Query().Get("username")
 	room := r.URL.Query().Get("room")
 	if username == "" {
 		username = fmt.Sprintf("anon_%d", time.Now().UnixNano()%10000)
 	}
 	h.mu.Lock()
 	h.clients[conn] = true
 	h.clientMeta[conn] = ClientInfo{Username: username, Room: room}
 	h.mu.Unlock()
 	// Announce presence (ADR-007). A reconnect within the grace window cancels
 	// the pending "left" announcement and skips a redundant "joined".
 	rejoined := h.cancelLeaveAnnouncement(room, username)
 	if h.Redis != nil && room != "" {
 		_ = h.Redis.Set(context.Background(), fmt.Sprintf("presence:%s:%s", room, username), "online", 60*time.Second)
 		if !rejoined {
 			h.Broadcast(db.Message{Room: room, Username: "system", Text: username + " joined " + room, Type: "system", Timestamp: time.Now()})
 		}
 	}
 	// Push chat history on join (last 50 messages)
 	h.PushChatHistory(conn, room, 50)
 	// Heartbeat goroutine: refresh presence TTL every 30s
 	heartbeatStop := make(chan struct{})
 	go func() {
 		ticker := time.NewTicker(30 * time.Second)
 		defer ticker.Stop()
 		for {
 			select {
 			case <-ticker.C:
 				if h.Redis != nil && room != "" {
 					_ = h.Redis.Set(context.Background(), fmt.Sprintf("presence:%s:%s", room, username), "online", 60*time.Second)
 				}
 				// Ping to detect dead connections
 				if err := conn.WriteMessage(websocket.PingMessage, nil); err != nil {
 					return
 				}
 			case <-heartbeatStop:
 				return
 			}
 		}
 	}()
 	defer func() {
 		close(heartbeatStop)
 		h.mu.Lock()
 		delete(h.clients, conn)
 		delete(h.clientMeta, conn)
 		h.mu.Unlock()
 		if h.Redis != nil && room != "" {
 			_ = h.Redis.Del(context.Background(), fmt.Sprintf("presence:%s:%s", room, username))
 			h.scheduleLeaveAnnouncement(room, username)
 		}
 		conn.Close()
 	}()
 	for {
 		var msg db.Message
 		if err := conn.ReadJSON(&msg); err != nil {
 			break
 		}
 		msg.Timestamp = time.Now()
 		msg.Username = username // enforce from query param for security
 		// Check if banned before processing
 		if h.Redis != nil {
 			if isBanned, _ := h.Redis.Exists(context.Background(), fmt.Sprintf("banned:%s", username)); isBanned > 0 {
 				conn.WriteJSON(db.Message{Type: "system", Text: "You are banned from chat.", Timestamp: time.Now()})
 				continue
 			}
 			if isMuted, _ := h.Redis.Exists(context.Background(), fmt.Sprintf("muted:%s", username)); isMuted > 0 {
 				conn.WriteJSON(db.Message{Type: "system", Text: "You are muted.", Timestamp: time.Now()})
 				continue
 			}
 		}
 		// Rate limiting check
 		allowed, _ := ratelimit.CheckMessageRate(context.Background(), h.Redis, msg.Username, h.RateLimitMax, h.RateLimitWindow)
 		if !allowed {
 			conn.WriteJSON(db.Message{Type: "system", Text: "Rate limit exceeded. Please slow down.", Timestamp: time.Now()})
 			continue
 		}
 		// Handle moderation commands
 		if strings.HasPrefix(msg.Text, "/mod ") || strings.HasPrefix(msg.Text, "/mute ") || strings.HasPrefix(msg.Text, "/ban ") {
 			h.handleModerationCommand(msg, conn)
 			continue
 		}
 		// Handle typing indicator (ephemeral — not persisted, not rate-limited)
 		if msg.Type == "typing" {
 			h.BroadcastTyping(msg.Username, msg.Room)
 			continue
 		}
 		// Handle private DMs
 		if strings.HasPrefix(msg.Room, "dm:") {
 			h.handlePrivateDM(msg)
 			continue
 		}
 		msg.Type = "public"
 		log.Printf("Chat message in room %s from %s: %s", msg.Room, msg.Username, msg.Text)
 		h.Broadcast(msg)
 	}
 }
 // handlePrivateDM routes private messages to the specific user pair.
 func (h *Hub) handlePrivateDM(msg db.Message) {
 	msg.Type = "private"
 	h.DMsSent++
 	// Persist for history
 	if h.DB != nil {
 		h.DB.Create(&msg)
 	}
 	// Deliver to target if online
 	h.mu.Lock()
 	targetOnline := false
 	for conn, info := range h.clientMeta {
 		if info.Username == msg.Room || strings.Contains(msg.Room, info.Username) {
 			if err := conn.WriteJSON(msg); err == nil {
 				targetOnline = true
 			}
 		}
 	}
 	h.mu.Unlock()
 	if !targetOnline {
 		log.Printf("DM stored for offline user: %s -> room %s", msg.Username, msg.Room)
 	}
 	// Also deliver to sender for confirmation
 	h.mu.Lock()
 	for conn, info := range h.clientMeta {
 		if info.Username == msg.Username {
 			conn.WriteJSON(msg)
 			break
 		}
 	}
 	h.mu.Unlock()
 	log.Printf("Private DM from %s to room %s: %s", msg.Username, msg.Room, msg.Text)
 }
 // logModerationAction logs an action to the immutable ModerationLog table.
 func (h *Hub) logModerationAction(action, target, moderator, reason string) {
 	logEntry := db.ModerationLog{
 		Action:    action,
 		Target:    target,
 		Moderator: moderator,
 		Reason:    reason,
 		Timestamp: time.Now(),
 	}
 	if h.DB != nil {
 		h.DB.Create(&logEntry)
 	}
 	log.Printf("Moderation action logged: %s %s by %s - %s", action, target, moderator, reason)
 }
 // handleModerationCommand processes /mod, /mute, /ban commands.
 func (h *Hub) handleModerationCommand(msg db.Message, conn *websocket.Conn) {
 	parts := strings.Fields(msg.Text)
 	if len(parts) < 3 {
 		conn.WriteJSON(db.Message{Type: "system", Text: "Usage: /mute <user> <duration_m> <reason> or /ban <user> <reason>", Timestamp: time.Now()})
 		return
 	}
 	if msg.Username != h.AdminUsername {
 		conn.WriteJSON(db.Message{Type: "system", Text: "Only moderators can use moderation commands.", Timestamp: time.Now()})
 		return
 	}
 	action := strings.TrimPrefix(parts[0], "/")
 	target := parts[1]
 	reason := strings.Join(parts[2:], " ")
 	if h.Redis != nil {
 		switch action {
 		case "mute", "mod":
 			durationMinutes := 10 // default
 			if len(parts) >= 3 {
 				if d, err := strconv.Atoi(parts[2]); err == nil && d > 0 {
 					durationMinutes = d
 					if len(parts) > 3 {
 						reason = strings.Join(parts[3:], " ")
 					} else {
 						reason = "no reason given"
 					}
 				}
 			}
 			_ = h.Redis.Set(context.Background(), fmt.Sprintf("muted:%s", target), "1", time.Duration(durationMinutes)*time.Minute)
 		case "ban":
 			_ = h.Redis.Set(context.Background(), fmt.Sprintf("banned:%s", target), "1", 0) // no expiry
 		}
 	}
 	h.logModerationAction(action, target, msg.Username, reason)
 	h.Broadcast(db.Message{
 		Room:      msg.Room,
 		Username:  "system",
 		Type:      "system",
 		Text:      fmt.Sprintf("%s was %s by %s: %s", target, action, msg.Username, reason),
 		Timestamp: time.Now(),
 	})
 }
 // SubscribeRoomMessages listens for Redis pub/sub messages and fans out locally.
 func (h *Hub) SubscribeRoomMessages() {
 	if h.Redis == nil {
 		return
 	}
 	pubsub := h.Redis.PSubscribe(context.Background(), "room:*:messages")
 	defer pubsub.Close()
 	log.Printf("Redis pub/sub subscriber started (instance %s)", h.InstanceID)
 	for {
 		msg, err := pubsub.ReceiveMessage(context.Background())
 		if err != nil {
 			log.Printf("Redis pub/sub error: %v — retrying in 5s", err)
 			time.Sleep(5 * time.Second)
 			pubsub = h.Redis.PSubscribe(context.Background(), "room:*:messages")
 			continue
 		}
 		var envelope struct {
 			Instance string     `json:"instance"`
 			Msg      db.Message `json:"msg"`
 		}
 		if err := json.Unmarshal([]byte(msg.Payload), &envelope); err != nil {
 			continue
 		}
 		// Skip messages originating from this instance
 		if envelope.Instance == h.InstanceID {
 			continue
 		}
 		// Fan out to local clients
 		h.mu.Lock()
 		for client := range h.clients {
 			client.WriteJSON(envelope.Msg)
 		}
 		h.mu.Unlock()
 	}
 }
 // ScanPresence returns all active presence entries from Redis.
 func (h *Hub) ScanPresence(ctx context.Context) ([]db.Presence, error) {
 	if h.Redis == nil {
 		return nil, nil
 	}
 	keys, _, err := h.Redis.Scan(ctx, 0, "presence:*", 200)
 	if err != nil {
 		return nil, err
 	}
 	var presences []db.Presence
 	for _, key := range keys {
 		parts := strings.SplitN(key, ":", 3)
 		if len(parts) != 3 {
 			continue
 		}
 		presences = append(presences, db.Presence{
 			Room:     parts[1],
 			Username: parts[2],
 			Online:   true,
 		})
 	}
 	return presences, nil
 }
 // MuteUser mutes a user for a duration.
 func (h *Hub) MuteUser(ctx context.Context, username string, duration time.Duration) error {
 	if h.Redis == nil {
 		return fmt.Errorf("redis unavailable")
 	}
 	return h.Redis.Set(ctx, fmt.Sprintf("muted:%s", username), "1", duration)
 }
 // UnmuteUser removes a mute.
 func (h *Hub) UnmuteUser(ctx context.Context, username string) error {
 	if h.Redis == nil {
 		return fmt.Errorf("redis unavailable")
 	}
 	return h.Redis.Del(ctx, fmt.Sprintf("muted:%s", username))
 }
 // BanUser bans a user permanently.
 func (h *Hub) BanUser(ctx context.Context, username string) error {
 	if h.Redis == nil {
 		return fmt.Errorf("redis unavailable")
 	}
 	return h.Redis.Set(ctx, fmt.Sprintf("banned:%s", username), "1", 0)
 }
 // UnbanUser removes a ban.
 func (h *Hub) UnbanUser(ctx context.Context, username string) error {
 	if h.Redis == nil {
 		return fmt.Errorf("redis unavailable")
 	}
 	return h.Redis.Del(ctx, fmt.Sprintf("banned:%s", username))
 }
@@ -0,0 +1,611 @@
 package ws
 import (
 	"context"
 	"encoding/json"
 	"net/http"
 	"net/http/httptest"
 	"strings"
 	"sync"
 	"testing"
 	"time"
 	"github.com/glebarez/sqlite"
 	"github.com/gorilla/websocket"
 	"gorm.io/gorm"
 	"chat/src/db"
 )
 // mockRedis implements db.RedisClient for testing.
 type mockRedis struct {
 	mu      sync.Mutex
 	store   map[string]string
 	pubsubs []*mockPubSub
 }
 func newMockRedis() *mockRedis {
 	return &mockRedis{store: make(map[string]string)}
 }
 func (m *mockRedis) Ping(ctx context.Context) error { return nil }
 func (m *mockRedis) Set(ctx context.Context, key string, value interface{}, expiration time.Duration) error {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	m.store[key] = value.(string)
 	return nil
 }
 func (m *mockRedis) Get(ctx context.Context, key string) (string, error) {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	return m.store[key], nil
 }
 func (m *mockRedis) Del(ctx context.Context, keys ...string) error {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	for _, k := range keys {
 		delete(m.store, k)
 	}
 	return nil
 }
 func (m *mockRedis) Incr(ctx context.Context, key string) (int64, error) { return 0, nil }
 func (m *mockRedis) Decr(ctx context.Context, key string) (int64, error) { return 0, nil }
 func (m *mockRedis) Expire(ctx context.Context, key string, expiration time.Duration) error {
 	return nil
 }
 func (m *mockRedis) Exists(ctx context.Context, keys ...string) (int64, error) {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	for _, k := range keys {
 		if _, ok := m.store[k]; ok {
 			return 1, nil
 		}
 	}
 	return 0, nil
 }
 func (m *mockRedis) Publish(ctx context.Context, channel string, message interface{}) error {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	payload, _ := json.Marshal(message)
 	for _, ps := range m.pubsubs {
 		ps.messages <- &db.PubSubMessage{Channel: channel, Payload: string(payload)}
 	}
 	return nil
 }
 func (m *mockRedis) PSubscribe(ctx context.Context, channels ...string) db.PubSub {
 	ps := &mockPubSub{messages: make(chan *db.PubSubMessage, 100)}
 	m.mu.Lock()
 	m.pubsubs = append(m.pubsubs, ps)
 	m.mu.Unlock()
 	return ps
 }
 func (m *mockRedis) Scan(ctx context.Context, cursor uint64, match string, count int64) ([]string, uint64, error) {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	var keys []string
 	for k := range m.store {
 		if strings.Contains(k, strings.TrimSuffix(match, "*")) {
 			keys = append(keys, k)
 		}
 	}
 	return keys, 0, nil
 }
 func (m *mockRedis) Info(ctx context.Context, sections ...string) (string, error) { return "", nil }
 func (m *mockRedis) Close() error                                                   { return nil }
 type mockPubSub struct {
 	messages chan *db.PubSubMessage
 }
 func (m *mockPubSub) ReceiveMessage(ctx context.Context) (*db.PubSubMessage, error) {
 	select {
 	case msg := <-m.messages:
 		return msg, nil
 	case <-ctx.Done():
 		return nil, ctx.Err()
 	}
 }
 func (m *mockPubSub) Close() error { return nil }
 func setupTestHub(t *testing.T) (*Hub, *gorm.DB, *mockRedis) {
 	t.Helper()
 	gormDB, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
 	if err != nil {
 		t.Fatalf("failed to open test DB: %v", err)
 	}
 	sqlDB, err := gormDB.DB()
 	if err != nil {
 		t.Fatalf("failed to get sql.DB: %v", err)
 	}
 	sqlDB.SetMaxOpenConns(1)
 	gormDB.AutoMigrate(&db.Message{}, &db.ModerationLog{})
 	mr := newMockRedis()
 	hub := NewHub(gormDB, mr, "test-instance", 10, 10*time.Second, "admin")
 	return hub, gormDB, mr
 }
 func setupWSServer(hub *Hub) *httptest.Server {
 	return httptest.NewServer(http.HandlerFunc(hub.HandleConnection))
 }
 // wsClient wraps a websocket.Conn with a channel-based read helper.
 type wsClient struct {
 	conn   *websocket.Conn
 	msgs   chan db.Message
 	errors chan error
 	done   chan struct{}
 }
 func newWSClient(t *testing.T, url string) *wsClient {
 	t.Helper()
 	conn, _, err := websocket.DefaultDialer.Dial(url, nil)
 	if err != nil {
 		t.Fatalf("Dial error: %v", err)
 	}
 	wc := &wsClient{
 		conn:   conn,
 		msgs:   make(chan db.Message, 100),
 		errors: make(chan error, 1),
 		done:   make(chan struct{}),
 	}
 	go wc.readLoop()
 	return wc
 }
 func (wc *wsClient) readLoop() {
 	defer close(wc.msgs)
 	for {
 		var msg db.Message
 		if err := wc.conn.ReadJSON(&msg); err != nil {
 			wc.errors <- err
 			return
 		}
 		select {
 		case wc.msgs <- msg:
 		case <-wc.done:
 			return
 		}
 	}
 }
 func (wc *wsClient) close() {
 	close(wc.done)
 	wc.conn.Close()
 }
 // recvMsg reads the next message with a timeout.
 func (wc *wsClient) recvMsg(timeout time.Duration) (*db.Message, error) {
 	select {
 	case msg := <-wc.msgs:
 		return &msg, nil
 	case err := <-wc.errors:
 		return nil, err
 	case <-time.After(timeout):
 		return nil, context.DeadlineExceeded
 	}
 }
 // skipSystem reads and discards system messages.
 func (wc *wsClient) skipSystem(timeout time.Duration) {
 	for {
 		msg, err := wc.recvMsg(timeout)
 		if err != nil || msg.Type != "system" {
 			return
 		}
 	}
 }
 func (wc *wsClient) writeJSON(v interface{}) error {
 	return wc.conn.WriteJSON(v)
 }
 func TestHub_Broadcast(t *testing.T) {
 	hub, _, _ := setupTestHub(t)
 	msg := db.Message{
 		Room:      "main",
 		Username:  "user1",
 		Text:      "hello",
 		Timestamp: time.Now(),
 		Type:      "public",
 	}
 	hub.Broadcast(msg)
 	var count int64
 	hub.DB.Model(&db.Message{}).Count(&count)
 	if count != 1 {
 		t.Errorf("message count = %d, want 1", count)
 	}
 }
 func TestHub_ConnectedClients(t *testing.T) {
 	hub, _, _ := setupTestHub(t)
 	if hub.ConnectedClients() != 0 {
 		t.Errorf("ConnectedClients() = %d, want 0", hub.ConnectedClients())
 	}
 }
 func TestHub_WebSocketConnection(t *testing.T) {
 	hub, _, _ := setupTestHub(t)
 	srv := setupWSServer(hub)
 	defer srv.Close()
 	wsURL := "ws" + strings.TrimPrefix(srv.URL, "http") + "?username=testuser&room=main"
 	wc := newWSClient(t, wsURL)
 	defer wc.close()
 	msg, err := wc.recvMsg(2 * time.Second)
 	if err != nil {
 		t.Fatalf("recvMsg error: %v", err)
 	}
 	if !strings.Contains(msg.Text, "joined") {
 		t.Errorf("expected join message, got text=%s", msg.Text)
 	}
 	if hub.ConnectedClients() != 1 {
 		t.Errorf("ConnectedClients() = %d, want 1", hub.ConnectedClients())
 	}
 }
 func TestHub_SendMessage(t *testing.T) {
 	hub, _, _ := setupTestHub(t)
 	srv := setupWSServer(hub)
 	defer srv.Close()
 	wsURL := "ws" + strings.TrimPrefix(srv.URL, "http") + "?username=testuser&room=main"
 	wc := newWSClient(t, wsURL)
 	defer wc.close()
 	wc.skipSystem(2 * time.Second)
 	if err := wc.writeJSON(db.Message{Room: "main", Text: "hello world"}); err != nil {
 		t.Fatalf("writeJSON error: %v", err)
 	}
 	recvMsg, err := wc.recvMsg(2 * time.Second)
 	if err != nil {
 		t.Fatalf("recvMsg error: %v", err)
 	}
 	if recvMsg.Text != "hello world" {
 		t.Errorf("recvMsg.Text = %q, want hello world", recvMsg.Text)
 	}
 	if recvMsg.Username != "testuser" {
 		t.Errorf("recvMsg.Username = %q, want testuser", recvMsg.Username)
 	}
 	if recvMsg.Type != "public" {
 		t.Errorf("recvMsg.Type = %q, want public", recvMsg.Type)
 	}
 }
 func TestHub_Disconnect(t *testing.T) {
 	hub, _, _ := setupTestHub(t)
 	srv := setupWSServer(hub)
 	defer srv.Close()
 	wsURL := "ws" + strings.TrimPrefix(srv.URL, "http") + "?username=testuser&room=main"
 	wc := newWSClient(t, wsURL)
 	wc.skipSystem(2 * time.Second)
 	if hub.ConnectedClients() != 1 {
 		t.Errorf("ConnectedClients() = %d, want 1", hub.ConnectedClients())
 	}
 	wc.close()
 	time.Sleep(200 * time.Millisecond)
 	if hub.ConnectedClients() != 0 {
 		t.Errorf("ConnectedClients() after close = %d, want 0", hub.ConnectedClients())
 	}
 }
 func TestHub_BannedUser(t *testing.T) {
 	hub, _, mr := setupTestHub(t)
 	srv := setupWSServer(hub)
 	defer srv.Close()
 	mr.Set(context.Background(), "banned:testuser", "1", 0)
 	wsURL := "ws" + strings.TrimPrefix(srv.URL, "http") + "?username=testuser&room=main"
 	wc := newWSClient(t, wsURL)
 	defer wc.close()
 	wc.skipSystem(2 * time.Second)
 	wc.writeJSON(db.Message{Room: "main", Text: "hello"})
 	recvMsg, err := wc.recvMsg(2 * time.Second)
 	if err != nil {
 		t.Fatalf("recvMsg error: %v", err)
 	}
 	if !strings.Contains(recvMsg.Text, "banned") {
 		t.Errorf("expected banned message, got %q", recvMsg.Text)
 	}
 }
 func TestHub_MutedUser(t *testing.T) {
 	hub, _, mr := setupTestHub(t)
 	srv := setupWSServer(hub)
 	defer srv.Close()
 	mr.Set(context.Background(), "muted:testuser", "1", 0)
 	wsURL := "ws" + strings.TrimPrefix(srv.URL, "http") + "?username=testuser&room=main"
 	wc := newWSClient(t, wsURL)
 	defer wc.close()
 	wc.skipSystem(2 * time.Second)
 	wc.writeJSON(db.Message{Room: "main", Text: "hello"})
 	recvMsg, err := wc.recvMsg(2 * time.Second)
 	if err != nil {
 		t.Fatalf("recvMsg error: %v", err)
 	}
 	if !strings.Contains(recvMsg.Text, "muted") {
 		t.Errorf("expected muted message, got %q", recvMsg.Text)
 	}
 }
 func TestHub_ModerationCommand(t *testing.T) {
 	hub, _, _ := setupTestHub(t)
 	srv := setupWSServer(hub)
 	defer srv.Close()
 	wsURL := "ws" + strings.TrimPrefix(srv.URL, "http") + "?username=admin&room=main"
 	wc := newWSClient(t, wsURL)
 	defer wc.close()
 	wc.skipSystem(2 * time.Second)
 	wc.writeJSON(db.Message{Room: "main", Text: "/mute baduser 5 spamming"})
 	recvMsg, err := wc.recvMsg(2 * time.Second)
 	if err != nil {
 		t.Fatalf("recvMsg error: %v", err)
 	}
 	if !strings.Contains(recvMsg.Text, "mute") {
 		t.Errorf("expected mute broadcast, got text=%s", recvMsg.Text)
 	}
 	var count int64
 	hub.DB.Model(&db.ModerationLog{}).Count(&count)
 	if count != 1 {
 		t.Errorf("moderation log count = %d, want 1", count)
 	}
 }
 func TestHub_NonAdminModerationCommand(t *testing.T) {
 	hub, _, _ := setupTestHub(t)
 	srv := setupWSServer(hub)
 	defer srv.Close()
 	wsURL := "ws" + strings.TrimPrefix(srv.URL, "http") + "?username=regularuser&room=main"
 	wc := newWSClient(t, wsURL)
 	defer wc.close()
 	wc.skipSystem(2 * time.Second)
 	wc.writeJSON(db.Message{Room: "main", Text: "/mute baduser 5 spamming"})
 	recvMsg, err := wc.recvMsg(2 * time.Second)
 	if err != nil {
 		t.Fatalf("recvMsg error: %v", err)
 	}
 	if !strings.Contains(recvMsg.Text, "Only moderators") {
 		t.Errorf("expected moderator-only message, got %q", recvMsg.Text)
 	}
 }
 func TestHub_PrivateDM(t *testing.T) {
 	hub, _, _ := setupTestHub(t)
 	srv := setupWSServer(hub)
 	defer srv.Close()
 	wsURL := "ws" + strings.TrimPrefix(srv.URL, "http")
 	wc1 := newWSClient(t, wsURL+"?username=alice&room=main")
 	defer wc1.close()
 	wc2 := newWSClient(t, wsURL+"?username=bob&room=main")
 	defer wc2.close()
 	wc1.skipSystem(2 * time.Second)
 	wc2.skipSystem(2 * time.Second)
 	wc1.writeJSON(db.Message{Room: "dm:bob", Text: "hey bob"})
 	recvMsg, err := wc2.recvMsg(2 * time.Second)
 	if err != nil {
 		t.Fatalf("bob recvMsg error: %v", err)
 	}
 	if recvMsg.Type != "private" {
 		t.Errorf("expected private type, got %s", recvMsg.Type)
 	}
 	if recvMsg.Text != "hey bob" {
 		t.Errorf("expected 'hey bob', got %q", recvMsg.Text)
 	}
 	recvMsg2, err := wc1.recvMsg(2 * time.Second)
 	if err != nil {
 		t.Fatalf("alice recvMsg error: %v", err)
 	}
 	if recvMsg2.Type != "private" {
 		t.Errorf("expected private confirmation, got %s", recvMsg2.Type)
 	}
 }
 func TestHub_PushChatHistory(t *testing.T) {
 	hub, gormDB, _ := setupTestHub(t)
 	for i := 0; i < 5; i++ {
 		gormDB.Create(&db.Message{
 			Room:      "main",
 			Username:  "user1",
 			Text:      "msg",
 			Timestamp: time.Now().Add(time.Duration(i) * time.Second),
 			Type:      "public",
 		})
 	}
 	srv := setupWSServer(hub)
 	defer srv.Close()
 	wsURL := "ws" + strings.TrimPrefix(srv.URL, "http") + "?username=newuser&room=main"
 	wc := newWSClient(t, wsURL)
 	defer wc.close()
 	count := 0
 	for i := 0; i < 10; i++ {
 		msg, err := wc.recvMsg(2 * time.Second)
 		if err != nil {
 			break
 		}
 		if msg.Type == "public" {
 			count++
 		}
 	}
 	if count != 5 {
 		t.Errorf("history message count = %d, want 5", count)
 	}
 }
 func TestHub_MuteUser_UnmuteUser(t *testing.T) {
 	hub, _, mr := setupTestHub(t)
 	ctx := context.Background()
 	err := hub.MuteUser(ctx, "user1", 10*time.Minute)
 	if err != nil {
 		t.Fatalf("MuteUser error = %v", err)
 	}
 	exists, _ := mr.Exists(ctx, "muted:user1")
 	if exists != 1 {
 		t.Error("muted key not found after MuteUser")
 	}
 	err = hub.UnmuteUser(ctx, "user1")
 	if err != nil {
 		t.Fatalf("UnmuteUser error = %v", err)
 	}
 	exists, _ = mr.Exists(ctx, "muted:user1")
 	if exists != 0 {
 		t.Error("muted key still exists after UnmuteUser")
 	}
 }
 func TestHub_BanUser_UnbanUser(t *testing.T) {
 	hub, _, mr := setupTestHub(t)
 	ctx := context.Background()
 	err := hub.BanUser(ctx, "user1")
 	if err != nil {
 		t.Fatalf("BanUser error = %v", err)
 	}
 	exists, _ := mr.Exists(ctx, "banned:user1")
 	if exists != 1 {
 		t.Error("banned key not found after BanUser")
 	}
 	err = hub.UnbanUser(ctx, "user1")
 	if err != nil {
 		t.Fatalf("UnbanUser error = %v", err)
 	}
 	exists, _ = mr.Exists(ctx, "banned:user1")
 	if exists != 0 {
 		t.Error("banned key still exists after UnbanUser")
 	}
 }
 func TestHub_ScanPresence(t *testing.T) {
 	hub, _, mr := setupTestHub(t)
 	ctx := context.Background()
 	mr.Set(ctx, "presence:main:user1", "online", 0)
 	mr.Set(ctx, "presence:main:user2", "online", 0)
 	mr.Set(ctx, "presence:lobby:user3", "online", 0)
 	presences, err := hub.ScanPresence(ctx)
 	if err != nil {
 		t.Fatalf("ScanPresence error = %v", err)
 	}
 	if len(presences) != 3 {
 		t.Errorf("ScanPresence len = %d, want 3", len(presences))
 	}
 }
 func TestHub_SubscribeRoomMessages(t *testing.T) {
 	hub, _, mr := setupTestHub(t)
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 	go func() {
 		hub.SubscribeRoomMessages()
 	}()
 	payload, _ := json.Marshal(map[string]any{
 		"instance": "other-instance",
 		"msg": db.Message{
 			Room:      "main",
 			Username:  "remoteuser",
 			Text:      "remote hello",
 			Timestamp: time.Now(),
 			Type:      "public",
 		},
 	})
 	mr.Publish(ctx, "room:main:messages", string(payload))
 	time.Sleep(50 * time.Millisecond)
 	ownPayload, _ := json.Marshal(map[string]any{
 		"instance": "test-instance",
 		"msg": db.Message{
 			Room:      "main",
 			Username:  "localuser",
 			Text:      "local hello",
 			Timestamp: time.Now(),
 			Type:      "public",
 		},
 	})
 	mr.Publish(ctx, "room:main:messages", string(ownPayload))
 	time.Sleep(50 * time.Millisecond)
 }
 func TestHub_Broadcast_SystemNotPersisted(t *testing.T) {
 	hub, _, _ := setupTestHub(t)
 	hub.Broadcast(db.Message{Room: "main", Username: "system", Text: "bob joined main", Type: "system", Timestamp: time.Now()})
 	var count int64
 	hub.DB.Model(&db.Message{}).Where("type = ?", "system").Count(&count)
 	if count != 0 {
 		t.Errorf("system message count = %d, want 0 (system messages must not persist)", count)
 	}
 	hub.Broadcast(db.Message{Room: "main", Username: "bob", Text: "hi", Type: "public", Timestamp: time.Now()})
 	hub.DB.Model(&db.Message{}).Where("type = ?", "public").Count(&count)
 	if count != 1 {
 		t.Errorf("public message count = %d, want 1", count)
 	}
 }
 func TestHub_ReconnectGracePeriod(t *testing.T) {
 	hub, _, _ := setupTestHub(t)
 	hub.PresenceGracePeriod = 50 * time.Millisecond
 	// Disconnect schedules a delayed "left"; reconnect cancels it.
 	hub.scheduleLeaveAnnouncement("main", "bob")
 	if !hub.cancelLeaveAnnouncement("main", "bob") {
 		t.Error("expected a pending leave announcement to be cancelled on reconnect")
 	}
 	if hub.cancelLeaveAnnouncement("main", "bob") {
 		t.Error("expected no pending leave announcement after cancellation")
 	}
 	// A fresh disconnect that is never reconnected fires after the grace period
 	// and cleans up its timer.
 	hub.scheduleLeaveAnnouncement("main", "alice")
 	time.Sleep(120 * time.Millisecond)
 	hub.presenceMu.Lock()
 	_, exists := hub.presenceTimers["main\x00alice"]
 	hub.presenceMu.Unlock()
 	if exists {
 		t.Error("expected the leave announcement timer to clean itself up after firing")
 	}
 }
@@ -2,12 +2,11 @@ FROM golang:1.25-alpine AS builder
 WORKDIR /app
 COPY src/ ./src/
 COPY src/go.mod src/go.sum ./
-# Initialize Go module if not present
+# Download dependencies and build
-RUN go mod init playout || true
+RUN go mod download
-RUN go mod tidy
+RUN CGO_ENABLED=0 GOOS=linux GOFLAGS=-mod=mod go build -o /playlist-manager ./src/playlist.go
 RUN CGO_ENABLED=0 GOOS=linux go build -o /playlist-manager ./src/playlist.go
 FROM alpine:3.20
@@ -0,0 +1,29 @@
 module playout
 go 1.25.0
 require (
 	github.com/aws/aws-sdk-go-v2 v1.43.4
 	github.com/aws/aws-sdk-go-v2/config v1.32.35
 	github.com/aws/aws-sdk-go-v2/service/s3 v1.107.0
 	github.com/fsnotify/fsnotify v1.8.0
 )
 require (
 	github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.7.16 // indirect
 	github.com/aws/aws-sdk-go-v2/credentials v1.19.34 // indirect
 	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.18.35 // indirect
 	github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.35 // indirect
 	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.35 // indirect
 	github.com/aws/aws-sdk-go-v2/internal/v4a v1.4.36 // indirect
 	github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.13.15 // indirect
 	github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.9.28 // indirect
 	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.13.35 // indirect
 	github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.19.36 // indirect
 	github.com/aws/aws-sdk-go-v2/service/signin v1.5.4 // indirect
 	github.com/aws/aws-sdk-go-v2/service/sso v1.33.4 // indirect
 	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.38.4 // indirect
 	github.com/aws/aws-sdk-go-v2/service/sts v1.45.4 // indirect
 	github.com/aws/smithy-go v1.27.6 // indirect
 	golang.org/x/sys v0.13.0 // indirect
 )
@@ -0,0 +1,40 @@
 github.com/aws/aws-sdk-go-v2 v1.43.4 h1:b9FTvbRwy+JCsfp2Wp6wV/KbOx3Aj7nkoFb2cRX0IhE=
 github.com/aws/aws-sdk-go-v2 v1.43.4/go.mod h1:70vwSy16txshwG+g55WkpgPKDIByzHI8ccBsOteo3bQ=
 github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.7.16 h1:aiuaKlDweRC5qExJondpWjOgyzMHpofpwspGXUtwn4c=
 github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.7.16/go.mod h1:nG/LOlmox9BDe9HvQnXWzgcK8uKbgBMZ/Hp5pVt/21I=
 github.com/aws/aws-sdk-go-v2/config v1.32.35 h1:UEzXuET8E42lxBPijuACu/tEK7v5lFPlk0Q+GT5WD9E=
 github.com/aws/aws-sdk-go-v2/config v1.32.35/go.mod h1:KaMtJpFa2JlL2BStjjHQVwQpzZEmw+ND/EgVrfFoo2g=
 github.com/aws/aws-sdk-go-v2/credentials v1.19.34 h1:y6GkSmcv5myd1ngrYbGmiLlwQqB6TQhOuN/tbSSuWDY=
 github.com/aws/aws-sdk-go-v2/credentials v1.19.34/go.mod h1:w3dTcnDVoQIewjo7JG45hduAToikiIFLC4FIO7fndvw=
 github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.18.35 h1:+S7kbJoLDDQ5tE+lHrUBgMkzC8NLgsaioS2F3dVoFAE=
 github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.18.35/go.mod h1:Ak7xXviIARfFdNUJ9Etb0bdVDt/KAvKjMGJVLWXDzik=
 github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.35 h1:kzVuGlatQtYinwBJEEyLAbggepCoavosiaHHX9+fD+c=
 github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.35/go.mod h1:0yLx0yEI+SfqeJMPvOtIEFoZbiQYXMGszBueiutQyaI=
 github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.35 h1:WK6CjihTuLisCjSKKbildJ79sGZZgbBz3iNa7VsKIhU=
 github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.35/go.mod h1:KYleN57luLoe97R7vTnx8PMcVrr9gAcRECtOjl91DNg=
 github.com/aws/aws-sdk-go-v2/internal/v4a v1.4.36 h1:jbGY4CXLzZElOXgGsexlC3Hi+3YM0rSmk4opFXKqg/k=
 github.com/aws/aws-sdk-go-v2/internal/v4a v1.4.36/go.mod h1:uBu/9aKsS/UQGc72RAt3y54kjgYQxmhut8ZD2dXCDNE=
 github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.13.15 h1:JJLBQxwY+AFwuPAi5ivGc1ChnTdUt4cXMv7e76m2c/Y=
 github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.13.15/go.mod h1:lQknBIe78MVL0cQOQDlag8KGflMbMEVFx9mB6O8ENvk=
 github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.9.28 h1:Q1TF1J9jVD+vFo0LzNnmNdQ9EAt52TS+MQlq9Ir+Yxo=
 github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.9.28/go.mod h1:4KqXXC/p1hrotmouDFbrRoWaLy962b9PMUReCG6+uWo=
 github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.13.35 h1:BBEElKh4a+rKshvjrfpajTe9CbpZvrbb4Jkg2PB7RzA=
 github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.13.35/go.mod h1:zaZk983w//8beSruBVec/mr4CmDwgZitW/qzGhAAX0g=
 github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.19.36 h1:EUIwBoN+q7UmhAejxgD27APiRjh1vwCFo53gSqdT0BM=
 github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.19.36/go.mod h1:6u00gmlTGR6W0b2k9NBrld7MnOEmf1Spqx0VVt6AqyE=
 github.com/aws/aws-sdk-go-v2/service/s3 v1.107.0 h1:OkYV+1171za+ab9otU1tGxMXhx6uZvwVEtVddjLuYTg=
 github.com/aws/aws-sdk-go-v2/service/s3 v1.107.0/go.mod h1:5FTZoQxhmLEiCAtYVk6V+t0iS/B5yGZVLZ3Wq5FDJZI=
 github.com/aws/aws-sdk-go-v2/service/signin v1.5.4 h1:cOJELVNrq5Q3Udry2GLuHUM7MhwpeaQRdYaoa6GI/yI=
 github.com/aws/aws-sdk-go-v2/service/signin v1.5.4/go.mod h1:f4LxzKBtaTxD7xh3PiVg3CE1tchQemfmghaJr+NbK2c=
 github.com/aws/aws-sdk-go-v2/service/sso v1.33.4 h1:AMW7a7S8iQaHjBYZdU3PCq4GKRPijTPRAc7e6XtEThY=
 github.com/aws/aws-sdk-go-v2/service/sso v1.33.4/go.mod h1:QQNsFV1DVXoXcZt18FS8lI8rtUrlDyAuWZLQ5shunv4=
 github.com/aws/aws-sdk-go-v2/service/ssooidc v1.38.4 h1:AsbZcJAQPRmHDJG8K1N0pof/1zPWjVT8TFlTWuGLSvo=
 github.com/aws/aws-sdk-go-v2/service/ssooidc v1.38.4/go.mod h1:6imqztH0//t0mKbl6yWl7swSEl7F/w32oAmqB3vP1ag=
 github.com/aws/aws-sdk-go-v2/service/sts v1.45.4 h1:w/AryDYMjSUANSQ2uoZxJovUsMTwWJNTv3IMex30Y+4=
 github.com/aws/aws-sdk-go-v2/service/sts v1.45.4/go.mod h1:WeBiAa67azG7Su9Vf+ChGDBLiAozJCXzdjXiPBUwtbc=
 github.com/aws/smithy-go v1.27.6 h1:0zjT8jgK3jbrTT7JJ3EE6JsMhX8JTrZ+f1sEndYDXrA=
 github.com/aws/smithy-go v1.27.6/go.mod h1:YE2RhdIuDbA5E5bTdciG9KrW3+TiEONeUWCqxX9i1Fc=
 github.com/fsnotify/fsnotify v1.8.0 h1:dAwr6QBTBZIkG8roQaJjGof0pp0EeF+tNV7YBP3F/8M=
 github.com/fsnotify/fsnotify v1.8.0/go.mod h1:8jBTzvmWwFyi3Pb8djgCCO5IBqzKJ/Jwo8TRcHyHii0=
 golang.org/x/sys v0.13.0 h1:Af8nKPmuFypiUBjVoU9V20FiaFXOcuZI21p0ycVYYGE=
 golang.org/x/sys v0.13.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@@ -0,0 +1,227 @@
 package main
 import (
 	"io"
 	"os"
 	"path/filepath"
 	"testing"
 	"github.com/aws/aws-sdk-go-v2/aws"
 	"github.com/aws/aws-sdk-go-v2/service/s3"
 )
 const sampleManifest = `#EXTM3U
 #EXT-X-VERSION:7
 #EXT-X-TARGETDURATION:2
 #EXT-X-MEDIA-SEQUENCE:0
 #EXT-X-INDEPENDENT-SEGMENTS
 #EXT-X-MAP:URI="init.mp4"
 #EXTINF:2.000000,
 seg-000000.m4s
 #EXTINF:2.000000,
 seg-000001.m4s
 #EXT-X-ENDLIST
 `
 func TestRewriteManifestToRun(t *testing.T) {
 	runID := "r-20260903T120000Z"
 	out := string(rewriteManifestToRun(runID, []byte(sampleManifest)))
 	wants := []string{
 		`#EXT-X-MAP:URI="r-20260903T120000Z/init.mp4"`,
 		"r-20260903T120000Z/seg-000000.m4s",
 		"r-20260903T120000Z/seg-000001.m4s",
 		"#EXTM3U",
 		"#EXT-X-VERSION:7",
 		"#EXT-X-TARGETDURATION:2",
 		"#EXT-X-MEDIA-SEQUENCE:0",
 		"#EXT-X-INDEPENDENT-SEGMENTS",
 		"#EXT-X-ENDLIST",
 		"#EXTINF:2.000000,",
 	}
 	for _, want := range wants {
 		if !contains(out, want) {
 			t.Errorf("output missing %q\noutput:\n%s", want, out)
 		}
 	}
 	// Media URIs must be prefixed (no bare segments left).
 	for _, bare := range []string{"\nseg-000000.m4s\n", "\nseg-000001.m4s\n", `URI="init.mp4"`} {
 		if contains(out, bare) {
 			t.Errorf("output still contains bare %q\noutput:\n%s", bare, out)
 		}
 	}
 }
 func TestRewriteManifestToRun_AlreadyPrefixedUnchanged(t *testing.T) {
 	manifest := "#EXTM3U\n#EXT-X-MAP:URI=\"r-old/init.mp4\"\nseg-000000.m4s\nr-old/seg-000001.m4s\n#EXT-X-ENDLIST\n"
 	out := string(rewriteManifestToRun("r-new", []byte(manifest)))
 	if !contains(out, `#EXT-X-MAP:URI="r-old/init.mp4"`) {
 		t.Errorf("EXT-X-MAP already-prefixed URI was rewritten: %s", out)
 	}
 	// A URI line that already contains a path is left alone.
 	if !contains(out, "r-old/seg-000001.m4s") {
 		t.Errorf("already-prefixed segment URI was changed:\n%s", out)
 	}
 	// Bare URI still gets the run prefix.
 	if !contains(out, "r-new/seg-000000.m4s") {
 		t.Errorf("bare segment not prefixed:\n%s", out)
 	}
 }
 func TestRewriteManifestToRun_HandlesTSAndComments(t *testing.T) {
 	manifest := "#EXTM3U\n# a comment\nvideo-1.ts\ninit.mp4\n#EXT-X-ENDLIST\n"
 	out := string(rewriteManifestToRun("r-x", []byte(manifest)))
 	for _, want := range []string{"r-x/video-1.ts", "r-x/init.mp4", "# a comment", "#EXTM3U", "#EXT-X-ENDLIST"} {
 		if !contains(out, want) {
 			t.Errorf("output missing %q\noutput:\n%s", want, out)
 		}
 	}
 }
 func TestRewriteManifestToRun_EmptyRunID(t *testing.T) {
 	out := rewriteManifestToRun("", []byte(sampleManifest))
 	if string(out) != sampleManifest {
 		t.Errorf("empty runID should return input unchanged")
 	}
 }
 func TestIsMediaURI(t *testing.T) {
 	for _, ok := range []string{"seg-000001.m4s", "init.mp4", "a.ts", "x.m4a"} {
 		if !isMediaURI(ok) {
 			t.Errorf("isMediaURI(%q) = false, want true", ok)
 		}
 	}
 	for _, notOK := range []string{"playlist.m3u8", "readme.txt", "seg-000001.m4s?x=1"} {
 		// Note: query strings are stripped; '?x=1' on m4s should still be media.
 		if notOK == "seg-000001.m4s?x=1" {
 			continue
 		}
 		if isMediaURI(notOK) {
 			t.Errorf("isMediaURI(%q) = true, want false", notOK)
 		}
 	}
 	if !isMediaURI("seg-000001.m4s?token=abc") {
 		t.Errorf("isMediaURI with query should strip query and be true")
 	}
 }
 func TestPublishManifest_RewritesToRunScopedURIs(t *testing.T) {
 	prevClient, prevBucket := r2Client, bucket
 	prevRunID, prevMode := runID, playoutMode
 	prevPut, prevCopy := putObject, copyObject
 	defer func() {
 		r2Client, bucket = prevClient, prevBucket
 		runID, playoutMode = prevRunID, prevMode
 		putObject, copyObject = prevPut, prevCopy
 	}()
 	tmpDir := t.TempDir()
 	mp := filepath.Join(tmpDir, "playlist.m3u8")
 	if err := os.WriteFile(mp, []byte(sampleManifest), 0o644); err != nil {
 		t.Fatalf("write manifest: %v", err)
 	}
 	bucket = "linearvoid-media"
 	runID = "r-20260903T120000Z"
 	playoutMode = "live"
 	r2Client = &s3.Client{}
 	var gotKey, gotCopySource, gotCopyKey string
 	var gotBody []byte
 	putObject = func(_ *s3.Client, in *s3.PutObjectInput) (*s3.PutObjectOutput, error) {
 		gotKey = aws.ToString(in.Key)
 		b, err := io.ReadAll(in.Body)
 		if err != nil {
 			return nil, err
 		}
 		gotBody = b
 		return &s3.PutObjectOutput{}, nil
 	}
 	copyObject = func(_ *s3.Client, in *s3.CopyObjectInput) (*s3.CopyObjectOutput, error) {
 		gotCopySource = aws.ToString(in.CopySource)
 		gotCopyKey = aws.ToString(in.Key)
 		return &s3.CopyObjectOutput{}, nil
 	}
 	if err := publishManifest(mp); err != nil {
 		t.Fatalf("publishManifest error: %v", err)
 	}
 	if gotKey != "hls/playlist.m3u8.tmp" {
 		t.Errorf("temp upload key = %q, want hls/playlist.m3u8.tmp", gotKey)
 	}
 	if gotCopySource != "linearvoid-media/hls/playlist.m3u8.tmp" {
 		t.Errorf("CopySource = %q, want linearvoid-media/hls/playlist.m3u8.tmp", gotCopySource)
 	}
 	if gotCopyKey != "hls/playlist.m3u8" {
 		t.Errorf("final key = %q, want hls/playlist.m3u8", gotCopyKey)
 	}
 	body := string(gotBody)
 	for _, want := range []string{
 		"r-20260903T120000Z/seg-000000.m4s",
 		"r-20260903T120000Z/seg-000001.m4s",
 		`#EXT-X-MAP:URI="r-20260903T120000Z/init.mp4"`,
 	} {
 		if !contains(body, want) {
 			t.Errorf("published manifest missing %q:\n%s", want, body)
 		}
 	}
 	for _, bare := range []string{"\nseg-000000.m4s\n", "\nseg-000001.m4s\n"} {
 		if contains(body, bare) {
 			t.Errorf("published manifest still contains bare %q:\n%s", bare, body)
 		}
 	}
 }
 func TestPublishManifest_SlateNotRewritten(t *testing.T) {
 	prevClient, prevBucket := r2Client, bucket
 	prevRunID, prevMode := runID, playoutMode
 	prevPut, prevCopy := putObject, copyObject
 	defer func() {
 		r2Client, bucket = prevClient, prevBucket
 		runID, playoutMode = prevRunID, prevMode
 		putObject, copyObject = prevPut, prevCopy
 	}()
 	tmpDir := t.TempDir()
 	mp := filepath.Join(tmpDir, "playlist.m3u8")
 	if err := os.WriteFile(mp, []byte(sampleManifest), 0o644); err != nil {
 		t.Fatalf("write manifest: %v", err)
 	}
 	bucket = "linearvoid-media"
 	runID = "r-20260903T120000Z"
 	playoutMode = "slate"
 	r2Client = &s3.Client{}
 	var gotBody []byte
 	putObject = func(_ *s3.Client, in *s3.PutObjectInput) (*s3.PutObjectOutput, error) {
 		b, _ := io.ReadAll(in.Body)
 		gotBody = b
 		return &s3.PutObjectOutput{}, nil
 	}
 	copyObject = func(_ *s3.Client, _ *s3.CopyObjectInput) (*s3.CopyObjectOutput, error) {
 		return &s3.CopyObjectOutput{}, nil
 	}
 	if err := publishManifest(mp); err != nil {
 		t.Fatalf("publishManifest error: %v", err)
 	}
 	if string(gotBody) != sampleManifest {
 		t.Errorf("slate manifest should be published unmodified; got:\n%s", string(gotBody))
 	}
 }
 func contains(s, sub string) bool {
 	for i := 0; i+len(sub) <= len(s); i++ {
 		if s[i:i+len(sub)] == sub {
 			return true
 		}
 	}
 	return false
 }
@@ -0,0 +1,947 @@
 package main
 // Test fixture generation commands (run from repository root):
 //
 // Valid 720p30 fixture (1.5s, H.264/AAC, yuv420p, 48000Hz, keyframe every 30 frames):
 //   ffmpeg -f lavfi -i testsrc2=duration=1.5:size=1280x720:rate=30 \
 //     -f lavfi -i sine=frequency=440:duration=1.5 \
 //     -c:v libx264 -preset ultrafast -crf 18 -pix_fmt yuv420p -g 30 -keyint_min 30 \
 //     -c:a aac -ar 48000 -ac 2 -shortest \
 //     backend/playout/testdata/valid_720p30.mp4
 //
 // Invalid h265 fixture (1.5s, HEVC, otherwise compliant):
 //   ffmpeg -f lavfi -i testsrc2=duration=1.5:size=1280x720:rate=30 \
 //     -f lavfi -i sine=frequency=440:duration=1.5 \
 //     -c:v libx265 -preset ultrafast -crf 28 -pix_fmt yuv420p -g 30 -keyint_min 30 \
 //     -c:a aac -ar 48000 -ac 2 -shortest \
 //     -tag:v hvc1 backend/playout/testdata/invalid_h265.mp4
 //
 // Invalid 24fps fixture (1.5s, correct codec but wrong framerate):
 //   ffmpeg -f lavfi -i testsrc2=duration=1.5:size=1280x720:rate=24 \
 //     -f lavfi -i sine=frequency=440:duration=1.5 \
 //     -c:v libx264 -preset ultrafast -crf 18 -pix_fmt yuv420p -g 24 -keyint_min 24 \
 //     -c:a aac -ar 48000 -ac 2 -shortest \
 //     backend/playout/testdata/invalid_24fps.mp4
 //
 // Test playlist fixtures are plain text files with paths relative to /app/media.
 // See backend/playout/testdata/*.txt.
 import (
 	"context"
 	"fmt"
 	"io"
 	"net/http"
 	"net/http/httptest"
 	"os"
 	"os/exec"
 	"path/filepath"
 	"strings"
 	"testing"
 	"time"
 	"github.com/aws/aws-sdk-go-v2/aws"
 	"github.com/aws/aws-sdk-go-v2/service/s3"
 	"github.com/aws/aws-sdk-go-v2/service/s3/types"
 )
 func ensureFFProbeInPath(t *testing.T) {
 	t.Helper()
 	if _, err := exec.LookPath("ffprobe"); err == nil {
 		return
 	}
 	windowsFFProbe := `C:\Users\zwits\AppData\Local\Microsoft\WinGet\Packages\Gyan.FFmpeg_Microsoft.Winget.Source_8wekyb3d8bbwe\ffmpeg-9.0-full_build\bin\ffprobe.exe`
 	if _, err := os.Stat(windowsFFProbe); err == nil {
 		t.Setenv("PATH", filepath.Dir(windowsFFProbe)+string(os.PathListSeparator)+os.Getenv("PATH"))
 		return
 	}
 	t.Skip("ffprobe not available on PATH and Windows WinGet install path not found")
 }
 func TestLoadPlaylist(t *testing.T) {
 	tests := []struct {
 		name    string
 		file    string
 		wantLen int
 		wantErr bool
 		first   string
 	}{
 		{
 			name:    "valid playlist",
 			file:    "valid_playlist.txt",
 			wantLen: 2,
 			first:   "/app/media/demo1.mp4",
 		},
 		{
 			name:    "empty playlist",
 			file:    "empty_playlist.txt",
 			wantLen: 0,
 		},
 		{
 			name:    "comments only",
 			file:    "comments_only.txt",
 			wantLen: 0,
 		},
 		{
 			name:    "mixed valid invalid",
 			file:    "mixed_valid_invalid.txt",
 			wantLen: 3,
 			first:   "/app/media/demo1.mp4",
 		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			path := filepath.Join("..", "testdata", tt.file)
 			videos, err := LoadPlaylist(path)
 			if tt.wantErr && err == nil {
 				t.Error("expected error, got nil")
 			}
 			if !tt.wantErr && err != nil {
 				t.Errorf("unexpected error: %v", err)
 			}
 			if len(videos) != tt.wantLen {
 				t.Errorf("len = %d, want %d", len(videos), tt.wantLen)
 			}
 			if tt.wantLen > 0 && videos[0].Path != tt.first {
 				t.Errorf("videos[0].Path = %q, want %q", videos[0].Path, tt.first)
 			}
 		})
 	}
 }
 func TestLoadPlaylist_FileNotFound(t *testing.T) {
 	_, err := LoadPlaylist("/nonexistent/playlist.txt")
 	if err == nil {
 		t.Error("expected error for missing file, got nil")
 	}
 }
 func TestValidateKeyframeInterval(t *testing.T) {
 	tests := []struct {
 		name     string
 		csvData  string
 		wantErr  bool
 		errText  string
 	}{
 		{
 			name:    "valid keyframes (gaps <=2s)",
 			csvData: "1,0.00\n0,0.50\n1,1.00\n0,1.50\n1,2.00\n0,2.50\n1,3.00\n",
 			wantErr: false,
 		},
 		{
 			name:    "gap too large >2s",
 			csvData: "1,0.00\n0,1.00\n1,3.50\n0,4.00\n1,6.00\n",
 			wantErr: true,
 			errText: "keyframe interval too large",
 		},
 		{
 			name:    "insufficient keyframes (<2)",
 			csvData: "1,0.00\n",
 			wantErr: true,
 			errText: "insufficient keyframes",
 		},
 		{
 			name:    "empty output",
 			csvData: "",
 			wantErr: true,
 			errText: "keyframe probe failed",
 		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			// create temp ffprobe that outputs csvData
 			tmpDir := t.TempDir()
 			mockProbe := filepath.Join(tmpDir, "ffprobe")
 			var script string
 			if tt.csvData == "" {
 				script = "@echo off\necho\nexit /b 1\n"
 			} else {
 				script = "@echo off\necho " + strings.ReplaceAll(tt.csvData, "\n", "& echo ") + "\nexit /b 0\n"
 			}
 			os.WriteFile(mockProbe+".bat", []byte(script), 0755)
 			os.Setenv("PATH", tmpDir+string(os.PathListSeparator)+os.Getenv("PATH"))
 			defer os.Unsetenv("PATH")
 			err := validateKeyframeInterval("test.mp4")
 			if tt.wantErr && err == nil {
 				t.Error("expected error, got nil")
 			}
 			if !tt.wantErr && err != nil {
 				t.Errorf("unexpected error: %v", err)
 			}
 			if tt.wantErr && tt.errText != "" && err != nil {
 				if !strings.Contains(err.Error(), tt.errText) {
 					t.Errorf("error = %v, want containing %q", err, tt.errText)
 				}
 			}
 		})
 	}
 }
 func TestValidateVideoStrict(t *testing.T) {
 	ensureFFProbeInPath(t)
 	tests := []struct {
 		name      string
 		file      string
 		wantValid bool
 		wantErr   string
 	}{
 		{
 			name:      "valid h264 fixture",
 			file:      "valid_720p30.mp4",
 			wantValid: true,
 		},
 		{
 			name:    "invalid h265 fixture",
 			file:    "invalid_h265.mp4",
 			wantErr: "video codec must be h264",
 		},
 		{
 			name:    "invalid framerate fixture",
 			file:    "invalid_24fps.mp4",
 			wantErr: "framerate must be 30/1",
 		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			path := filepath.Join("..", "testdata", tt.file)
 			result := ValidateVideoStrict(path)
 			valid, _ := result["valid"].(bool)
 			if valid != tt.wantValid {
 				t.Fatalf("valid = %v, want %v", valid, tt.wantValid)
 			}
 			errs, _ := result["errors"].([]string)
 			if tt.wantErr == "" {
 				if len(errs) != 0 {
 					t.Fatalf("errors = %v, want none", errs)
 				}
 				if got, ok := result["duration_seconds"].(float64); !ok || got <= 0 {
 					t.Fatalf("duration_seconds = %v, want positive duration", result["duration_seconds"])
 				}
 				return
 			}
 			if len(errs) == 0 {
 				t.Fatalf("errors = %v, want message containing %q", errs, tt.wantErr)
 			}
 			if !strings.Contains(strings.Join(errs, "; "), tt.wantErr) {
 				t.Fatalf("errors = %v, want message containing %q", errs, tt.wantErr)
 			}
 		})
 	}
 }
 func TestHealthHandler(t *testing.T) {
 	// Save and restore globals
 	prevMode := playoutMode
 	prevCount := restartCount
 	prevRunID := runID
 	playoutMode = "live"
 	restartCount = 3
 	runID = "r-20260810T120000Z"
 	lastR2PubTime = time.Now()
 	defer func() {
 		playoutMode = prevMode
 		restartCount = prevCount
 		runID = prevRunID
 	}()
 	req := httptest.NewRequest("GET", "/health", nil)
 	w := httptest.NewRecorder()
 	HealthHandler(w, req)
 	if w.Code != http.StatusOK {
 		t.Errorf("status = %d, want 200", w.Code)
 	}
 	body := w.Body.String()
 	for _, want := range []string{
 		`"status":"healthy"`,
 		`"service":"playout"`,
 		`"mode":"live"`,
 		`"crash_count":3`,
 		`"run_id":"r-20260810T120000Z"`,
 		`"last_segment_seq"`,
 		`"consecutive_failures"`,
 	} {
 		if !strings.Contains(body, want) {
 			t.Errorf("body missing %q: %s", want, body)
 		}
 	}
 }
 func TestHealthHandler_Degraded(t *testing.T) {
 	prevMode := playoutMode
 	prevR2Pub := lastR2PubTime
 	playoutMode = "slate"
 	lastR2PubTime = time.Now() // fresh R2 pub = not unhealthy
 	defer func() {
 		playoutMode = prevMode
 		lastR2PubTime = prevR2Pub
 	}()
 	req := httptest.NewRequest("GET", "/health", nil)
 	w := httptest.NewRecorder()
 	HealthHandler(w, req)
 	if w.Code != http.StatusOK {
 		t.Errorf("status = %d, want 200", w.Code)
 	}
 	body := w.Body.String()
 	if !strings.Contains(body, `"degraded"`) {
 		t.Errorf("body missing degraded: %s", body)
 	}
 }
 func TestHealthHandler_Unhealthy(t *testing.T) {
 	prevMode := playoutMode
 	prevR2Pub := lastR2PubTime
 	playoutMode = "live"
 	lastR2PubTime = time.Now().Add(-30 * time.Second) // stale R2 = unhealthy
 	defer func() {
 		playoutMode = prevMode
 		lastR2PubTime = prevR2Pub
 	}()
 	req := httptest.NewRequest("GET", "/health", nil)
 	w := httptest.NewRecorder()
 	HealthHandler(w, req)
 	body := w.Body.String()
 	if !strings.Contains(body, `"unhealthy"`) {
 		t.Errorf("body missing unhealthy (stale R2 pub should trigger unhealthy): %s", body)
 	}
 }
 func TestShouldEscalateToSlate(t *testing.T) {
 	// Save globals
 	prevCount := restartCount
 	prevWindow := restartWindow
 	defer func() {
 		restartCount = prevCount
 		restartWindow = prevWindow
 	}()
 	// Under threshold
 	restartWindow = time.Now()
 	restartCount = 3
 	if shouldEscalateToSlate() {
 		t.Error("shouldEscalateToSlate() = true, want false (under threshold)")
 	}
 	// At threshold
 	restartCount = maxRestartsPerMinute
 	if !shouldEscalateToSlate() {
 		t.Error("shouldEscalateToSlate() = false, want true (at threshold)")
 	}
 	// Over threshold
 	restartCount = 7
 	if !shouldEscalateToSlate() {
 		t.Error("shouldEscalateToSlate() = false, want true (over threshold)")
 	}
 	// Window expired
 	restartWindow = time.Now().Add(-61 * time.Second)
 	restartCount = 10
 	if shouldEscalateToSlate() {
 		t.Error("shouldEscalateToSlate() = true, want false (window expired, should reset)")
 	}
 	if restartCount != 0 {
 		t.Errorf("restartCount after window reset = %d, want 0", restartCount)
 	}
 }
 func TestResetHLSOutput(t *testing.T) {
 	tmpDir := t.TempDir()
 	// Create some segment files
 	os.MkdirAll(tmpDir, 0755)
 	os.WriteFile(filepath.Join(tmpDir, "segment_test.ts"), []byte("data"), 0644)
 	os.WriteFile(filepath.Join(tmpDir, "segment_test.m4s"), []byte("data"), 0644)
 	os.WriteFile(filepath.Join(tmpDir, "playlist.m3u8"), []byte("#EXTM3U"), 0644)
 	os.WriteFile(filepath.Join(tmpDir, "init.mp4"), []byte("init"), 0644)
 	err := resetHLSOutput(tmpDir)
 	if err != nil {
 		t.Fatalf("resetHLSOutput error: %v", err)
 	}
 	// Verify all cleaned
 	for _, name := range []string{"segment_test.ts", "segment_test.m4s", "playlist.m3u8", "init.mp4"} {
 		if _, err := os.Stat(filepath.Join(tmpDir, name)); !os.IsNotExist(err) {
 			t.Errorf("file %s still exists after reset", name)
 		}
 	}
 }
 func TestResetHLSOutput_EmptyDir(t *testing.T) {
 	tmpDir := t.TempDir()
 	err := resetHLSOutput(tmpDir)
 	if err != nil {
 		t.Fatalf("resetHLSOutput on empty dir error: %v", err)
 	}
 }
 func TestActivateSlate_NoSlate(t *testing.T) {
 	prevSlateDir := slateDir
 	prevHLSDir := hlsDir
 	prevMode := playoutMode
 	tmpDir := t.TempDir()
 	slateDir = filepath.Join(tmpDir, "slate")
 	hlsDir = filepath.Join(tmpDir, "hls")
 	os.MkdirAll(hlsDir, 0755)
 	defer func() {
 		slateDir = prevSlateDir
 		hlsDir = prevHLSDir
 		playoutMode = prevMode
 	}()
 	err := activateSlate()
 	if err == nil {
 		t.Error("expected error when slate HLS missing, got nil")
 	}
 }
 func TestActivateSlate_Success(t *testing.T) {
 	prevSlateDir := slateDir
 	prevHLSDir := hlsDir
 	prevMode := playoutMode
 	tmpDir := t.TempDir()
 	slateDir = filepath.Join(tmpDir, "slate")
 	hlsDir = filepath.Join(tmpDir, "hls")
 	// Create slate HLS structure
 	slateHLS := filepath.Join(slateDir, "hls")
 	os.MkdirAll(slateHLS, 0755)
 	os.MkdirAll(hlsDir, 0755)
 	os.WriteFile(filepath.Join(slateHLS, "slate.m3u8"), []byte("#EXTM3U\n#EXT-X-ENDLIST\n"), 0644)
 	os.WriteFile(filepath.Join(slateHLS, "slate_segment.ts"), []byte("slate-data"), 0644)
 	defer func() {
 		slateDir = prevSlateDir
 		hlsDir = prevHLSDir
 		playoutMode = prevMode
 	}()
 	err := activateSlate()
 	if err != nil {
 		t.Fatalf("activateSlate error: %v", err)
 	}
 	if playoutMode != "slate" {
 		t.Errorf("playoutMode = %q, want slate", playoutMode)
 	}
 	// Verify files copied
 	if _, err := os.Stat(filepath.Join(hlsDir, "slate.m3u8")); os.IsNotExist(err) {
 		t.Error("slate.m3u8 not copied to hls dir")
 	}
 }
 func TestDeactivateSlate(t *testing.T) {
 	prevMode := playoutMode
 	playoutMode = "slate"
 	defer func() { playoutMode = prevMode }()
 	deactivateSlate()
 	if playoutMode != "live" {
 		t.Errorf("playoutMode = %q, want live", playoutMode)
 	}
 }
 func TestValidatePlaylist(t *testing.T) {
 	// ValidatePlaylist calls ValidateVideo which needs ffprobe
 	t.Skip("requires ffprobe mock or test media fixtures")
 }
 func TestValidateWorkersConfig(t *testing.T) {
 	os.Unsetenv("PLAYOUT_VALIDATE_WORKERS")
 	if got := validateWorkers(); got < 1 {
 		t.Errorf("validateWorkers() = %d, want >= 1", got)
 	}
 	os.Setenv("PLAYOUT_VALIDATE_WORKERS", "3")
 	if got := validateWorkers(); got != 3 {
 		t.Errorf("validateWorkers() = %d, want 3", got)
 	}
 	os.Setenv("PLAYOUT_VALIDATE_WORKERS", "invalid")
 	if got := validateWorkers(); got < 1 {
 		t.Errorf("validateWorkers() = %d, want fallback >= 1", got)
 	}
 	os.Unsetenv("PLAYOUT_VALIDATE_WORKERS")
 }
 func TestValidatePlaylist_Dedup(t *testing.T) {
 	ensureFFProbeInPath(t)
 	valid := filepath.Join("..", "testdata", "valid_720p30.mp4")
 	playlistDir := t.TempDir()
 	p := filepath.Join(playlistDir, "playlist.txt")
 	// Same file listed three times to exercise dedup + order preservation.
 	content := fmt.Sprintf("file '%s'\nfile '%s'\nfile '%s'\n", valid, valid, valid)
 	if err := os.WriteFile(p, []byte(content), 0o644); err != nil {
 		t.Fatalf("write playlist: %v", err)
 	}
 	videos, err := ValidatePlaylist(p)
 	if err != nil {
 		t.Fatalf("ValidatePlaylist error: %v", err)
 	}
 	if len(videos) != 3 {
 		t.Fatalf("len = %d, want 3", len(videos))
 	}
 	for i, v := range videos {
 		if !v.Valid {
 			t.Errorf("entry %d invalid: %s", i, v.Validation)
 		}
 		if v.Path != valid {
 			t.Errorf("entry %d path = %q, want %q", i, v.Path, valid)
 		}
 	}
 }
 func TestSyncToR2(t *testing.T) {
 	prevClient := r2Client
 	prevBucket := bucket
 	prevPutObject := putObject
 	defer func() {
 		r2Client = prevClient
 		bucket = prevBucket
 		putObject = prevPutObject
 	}()
 	tmpDir := t.TempDir()
 	localPath := filepath.Join(tmpDir, "segment.m4s")
 	if err := os.WriteFile(localPath, []byte("segment-bytes"), 0o644); err != nil {
 		t.Fatalf("write fixture: %v", err)
 	}
 	bucket = "linearvoid-media"
 	r2Client = &s3.Client{}
 	var gotBucket, gotKey, gotCacheControl, gotContentType string
 	var gotBody []byte
 	putObject = func(_ *s3.Client, input *s3.PutObjectInput) (*s3.PutObjectOutput, error) {
 		gotBucket = aws.ToString(input.Bucket)
 		gotKey = aws.ToString(input.Key)
 		gotCacheControl = aws.ToString(input.CacheControl)
 		gotContentType = aws.ToString(input.ContentType)
 		body, err := io.ReadAll(input.Body)
 		if err != nil {
 			return nil, err
 		}
 		gotBody = body
 		return &s3.PutObjectOutput{}, nil
 	}
 	if err := SyncToR2(localPath, "hls/segment.m4s"); err != nil {
 		t.Fatalf("SyncToR2 error: %v", err)
 	}
 	if gotBucket != "linearvoid-media" {
 		t.Fatalf("bucket = %q, want %q", gotBucket, "linearvoid-media")
 	}
 	if gotKey != "hls/segment.m4s" {
 		t.Fatalf("key = %q, want %q", gotKey, "hls/segment.m4s")
 	}
 	if string(gotBody) != "segment-bytes" {
 		t.Fatalf("body = %q, want %q", string(gotBody), "segment-bytes")
 	}
 	if gotCacheControl != segmentCacheControl {
 		t.Fatalf("CacheControl = %q, want %q", gotCacheControl, segmentCacheControl)
 	}
 	if gotContentType != "video/MP2T" {
 		t.Fatalf("ContentType = %q, want %q", gotContentType, "video/MP2T")
 	}
 }
 func TestSyncToR2_ManifestCacheHeaders(t *testing.T) {
 	prevClient := r2Client
 	prevBucket := bucket
 	prevPutObject := putObject
 	defer func() {
 		r2Client = prevClient
 		bucket = prevBucket
 		putObject = prevPutObject
 	}()
 	tmpDir := t.TempDir()
 	localPath := filepath.Join(tmpDir, "playlist.m3u8")
 	if err := os.WriteFile(localPath, []byte("#EXTM3U\n"), 0o644); err != nil {
 		t.Fatalf("write fixture: %v", err)
 	}
 	bucket = "linearvoid-media"
 	r2Client = &s3.Client{}
 	var gotCacheControl, gotContentType string
 	putObject = func(_ *s3.Client, input *s3.PutObjectInput) (*s3.PutObjectOutput, error) {
 		gotCacheControl = aws.ToString(input.CacheControl)
 		gotContentType = aws.ToString(input.ContentType)
 		return &s3.PutObjectOutput{}, nil
 	}
 	if err := SyncToR2(localPath, "hls/playlist.m3u8"); err != nil {
 		t.Fatalf("SyncToR2 error: %v", err)
 	}
 	if gotCacheControl != manifestCacheControl {
 		t.Fatalf("CacheControl = %q, want %q", gotCacheControl, manifestCacheControl)
 	}
 	if gotContentType != "application/vnd.apple.mpegurl" {
 		t.Fatalf("ContentType = %q, want %q", gotContentType, "application/vnd.apple.mpegurl")
 	}
 }
 func TestSyncToR2_NoCacheHeadersForUnknownExt(t *testing.T) {
 	prevClient := r2Client
 	prevBucket := bucket
 	prevPutObject := putObject
 	defer func() {
 		r2Client = prevClient
 		bucket = prevBucket
 		putObject = prevPutObject
 	}()
 	tmpDir := t.TempDir()
 	localPath := filepath.Join(tmpDir, "data.bin")
 	if err := os.WriteFile(localPath, []byte("raw"), 0o644); err != nil {
 		t.Fatalf("write fixture: %v", err)
 	}
 	bucket = "linearvoid-media"
 	r2Client = &s3.Client{}
 	var gotCacheControl, gotContentType string
 	putObject = func(_ *s3.Client, input *s3.PutObjectInput) (*s3.PutObjectOutput, error) {
 		gotCacheControl = aws.ToString(input.CacheControl)
 		gotContentType = aws.ToString(input.ContentType)
 		return &s3.PutObjectOutput{}, nil
 	}
 	if err := SyncToR2(localPath, "misc/data.bin"); err != nil {
 		t.Fatalf("SyncToR2 error: %v", err)
 	}
 	if gotCacheControl != "" {
 		t.Fatalf("CacheControl = %q, want empty", gotCacheControl)
 	}
 	if gotContentType != "" {
 		t.Fatalf("ContentType = %q, want empty", gotContentType)
 	}
 }
 func TestR2KeepRuns(t *testing.T) {
 	os.Setenv("R2_KEEP_RUNS", "")
 	if got := r2KeepRuns(); got != 2 {
 		t.Errorf("default = %d, want 2", got)
 	}
 	os.Setenv("R2_KEEP_RUNS", "5")
 	if got := r2KeepRuns(); got != 5 {
 		t.Errorf("override = %d, want 5", got)
 	}
 	os.Setenv("R2_KEEP_RUNS", "0")
 	if got := r2KeepRuns(); got != 2 {
 		t.Errorf("invalid = %d, want 2 fallback", got)
 	}
 	os.Unsetenv("R2_KEEP_RUNS")
 }
 func TestR2MaxRetentionBytes(t *testing.T) {
 	os.Setenv("R2_MAX_RETENTION_BYTES", "")
 	if got := r2MaxRetentionBytes(); got != 10*1024*1024*1024 {
 		t.Errorf("default = %d, want 10GiB", got)
 	}
 	os.Setenv("R2_MAX_RETENTION_BYTES", "100")
 	if got := r2MaxRetentionBytes(); got != 100 {
 		t.Errorf("override = %d, want 100", got)
 	}
 	os.Setenv("R2_MAX_RETENTION_BYTES", "invalid")
 	if got := r2MaxRetentionBytes(); got != 10*1024*1024*1024 {
 		t.Errorf("invalid = %d, want 10GiB fallback", got)
 	}
 	os.Unsetenv("R2_MAX_RETENTION_BYTES")
 }
 func TestR2RunFromKey(t *testing.T) {
 	cases := []struct {
 		key string
 		run string
 		ok  bool
 	}{
 		{"hls/r-20260815T120000Z/seg-1.m4s", "r-20260815T120000Z", true},
 		{"hls/r-20260815T120000Z/init.mp4", "r-20260815T120000Z", true},
 		{"hls/playlist.m3u8", "", false},
 		{"hls/playlist.m3u8.tmp", "", false},
 		{"other/r-x/seg.m4s", "", false},
 		{"hls/r-noslash", "", false},
 	}
 	for _, c := range cases {
 		run, ok := r2RunFromKey(c.key)
 		if run != c.run || ok != c.ok {
 			t.Errorf("r2RunFromKey(%q) = (%q, %v), want (%q, %v)", c.key, run, ok, c.run, c.ok)
 		}
 	}
 }
 func TestCleanupOldRuns(t *testing.T) {
 	prevClient := r2Client
 	prevBucket := bucket
 	prevList := listObjects
 	prevDelete := deleteObjects
 	prevTotal := r2CleanupObjectsTotal
 	prevRuns := r2RunsRetained
 	prevBytes := r2BytesRetained
 	defer func() {
 		r2Client = prevClient
 		bucket = prevBucket
 		listObjects = prevList
 		deleteObjects = prevDelete
 		r2CleanupObjectsTotal = prevTotal
 		r2RunsRetained = prevRuns
 		r2BytesRetained = prevBytes
 	}()
 	bucket = "linearvoid-media"
 	r2Client = &s3.Client{}
 	size := int64(1024)
 	listObjects = func(_ *s3.Client, input *s3.ListObjectsV2Input) (*s3.ListObjectsV2Output, error) {
 		return &s3.ListObjectsV2Output{
 			Contents: []types.Object{
 				{Key: aws.String("hls/r-20260813T000000Z/seg-1.m4s"), Size: &size},
 				{Key: aws.String("hls/r-20260814T000000Z/seg-2.m4s"), Size: &size},
 				{Key: aws.String("hls/r-20260815T000000Z/seg-3.m4s"), Size: &size},
 				{Key: aws.String("hls/playlist.m3u8"), Size: &size},
 				{Key: aws.String("hls/playlist.m3u8.tmp"), Size: &size},
 			},
 			IsTruncated: aws.Bool(false),
 		}, nil
 	}
 	var deletedKeys []string
 	deleteObjects = func(_ *s3.Client, input *s3.DeleteObjectsInput) (*s3.DeleteObjectsOutput, error) {
 		for _, obj := range input.Delete.Objects {
 			deletedKeys = append(deletedKeys, aws.ToString(obj.Key))
 		}
 		return &s3.DeleteObjectsOutput{}, nil
 	}
 	n, err := cleanupOldRuns(context.Background())
 	if err != nil {
 		t.Fatalf("cleanupOldRuns error: %v", err)
 	}
 	if n != 1 {
 		t.Fatalf("deleted = %d, want 1 (oldest run)", n)
 	}
 	joined := strings.Join(deletedKeys, ",")
 	if !strings.Contains(joined, "hls/r-20260813T000000Z/seg-1.m4s") {
 		t.Fatalf("expected oldest run deleted, got: %v", deletedKeys)
 	}
 	if strings.Contains(joined, "playlist.m3u8") {
 		t.Fatalf("manifest must not be deleted: %v", deletedKeys)
 	}
 	if r2RunsRetained != 2 {
 		t.Fatalf("r2RunsRetained = %d, want 2", r2RunsRetained)
 	}
 	if r2BytesRetained != 2*size {
 		t.Fatalf("r2BytesRetained = %d, want %d", r2BytesRetained, 2*size)
 	}
 	if r2CleanupObjectsTotal != 1 {
 		t.Fatalf("r2CleanupObjectsTotal = %d, want 1", r2CleanupObjectsTotal)
 	}
 }
 func TestCleanupOldRuns_SizeCap(t *testing.T) {
 	prevClient := r2Client
 	prevBucket := bucket
 	prevList := listObjects
 	prevDelete := deleteObjects
 	prevTotal := r2CleanupObjectsTotal
 	prevRuns := r2RunsRetained
 	prevBytes := r2BytesRetained
 	defer func() {
 		r2Client = prevClient
 		bucket = prevBucket
 		listObjects = prevList
 		deleteObjects = prevDelete
 		r2CleanupObjectsTotal = prevTotal
 		r2RunsRetained = prevRuns
 		r2BytesRetained = prevBytes
 	}()
 	bucket = "linearvoid-media"
 	r2Client = &s3.Client{}
 	// Force a small cap so the size policy trims even the last 2 runs.
 	os.Setenv("R2_KEEP_RUNS", "2")
 	os.Setenv("R2_MAX_RETENTION_BYTES", "1024")
 	defer os.Unsetenv("R2_KEEP_RUNS")
 	defer os.Unsetenv("R2_MAX_RETENTION_BYTES")
 	size := int64(1024)
 	listObjects = func(_ *s3.Client, input *s3.ListObjectsV2Input) (*s3.ListObjectsV2Output, error) {
 		return &s3.ListObjectsV2Output{
 			Contents: []types.Object{
 				{Key: aws.String("hls/r-20260813T000000Z/seg-1.m4s"), Size: &size},
 				{Key: aws.String("hls/r-20260814T000000Z/seg-2.m4s"), Size: &size},
 				{Key: aws.String("hls/r-20260815T000000Z/seg-3.m4s"), Size: &size},
 			},
 			IsTruncated: aws.Bool(false),
 		}, nil
 	}
 	var deletedKeys []string
 	deleteObjects = func(_ *s3.Client, input *s3.DeleteObjectsInput) (*s3.DeleteObjectsOutput, error) {
 		for _, obj := range input.Delete.Objects {
 			deletedKeys = append(deletedKeys, aws.ToString(obj.Key))
 		}
 		return &s3.DeleteObjectsOutput{}, nil
 	}
 	n, err := cleanupOldRuns(context.Background())
 	if err != nil {
 		t.Fatalf("cleanupOldRuns error: %v", err)
 	}
 	// 3 runs -> keep 2 -> oldest deleted by count; remaining 2 bytes (2048) exceed
 	// the 1024 cap -> the older of the kept two is deleted, leaving only the newest.
 	if n != 2 {
 		t.Fatalf("deleted = %d, want 2", n)
 	}
 	joined := strings.Join(deletedKeys, ",")
 	if !strings.Contains(joined, "hls/r-20260813T000000Z/seg-1.m4s") {
 		t.Fatalf("expected oldest run deleted, got: %v", deletedKeys)
 	}
 	if !strings.Contains(joined, "hls/r-20260814T000000Z/seg-2.m4s") {
 		t.Fatalf("expected second-oldest run deleted by size cap, got: %v", deletedKeys)
 	}
 	if strings.Contains(joined, "hls/r-20260815T000000Z/seg-3.m4s") {
 		t.Fatalf("newest run must be kept, got: %v", deletedKeys)
 	}
 	if r2RunsRetained != 1 {
 		t.Fatalf("r2RunsRetained = %d, want 1", r2RunsRetained)
 	}
 }
 func TestPlaylistFingerprint(t *testing.T) {
 	tmpDir := t.TempDir()
 	p := filepath.Join(tmpDir, "playlist.txt")
 	if err := os.WriteFile(p, []byte("file '/app/media/a.mp4'\n"), 0o644); err != nil {
 		t.Fatal(err)
 	}
 	fp1, err := playlistFingerprint(p)
 	if err != nil {
 		t.Fatalf("playlistFingerprint error: %v", err)
 	}
 	fp2, err := playlistFingerprint(p)
 	if err != nil {
 		t.Fatalf("playlistFingerprint error: %v", err)
 	}
 	if fp1 != fp2 {
 		t.Errorf("fingerprint not stable: %q vs %q", fp1, fp2)
 	}
 	if err := os.WriteFile(p, []byte("file '/app/media/b.mp4'\n"), 0o644); err != nil {
 		t.Fatal(err)
 	}
 	fp3, err := playlistFingerprint(p)
 	if err != nil {
 		t.Fatalf("playlistFingerprint error: %v", err)
 	}
 	if fp1 == fp3 {
 		t.Errorf("fingerprint should change when playlist content changes")
 	}
 }
 func TestHLSNextStartNumber(t *testing.T) {
 	tmpDir := t.TempDir()
 	// Create segments 0..29 with a live window of 10.
 	for i := 0; i < 30; i++ {
 		if err := os.WriteFile(filepath.Join(tmpDir, fmt.Sprintf("seg-%06d.m4s", i)), []byte("x"), 0o644); err != nil {
 			t.Fatal(err)
 		}
 	}
 	next, err := hlsNextStartNumber(tmpDir, 10)
 	if err != nil {
 		t.Fatalf("hlsNextStartNumber error: %v", err)
 	}
 	if next != 30 {
 		t.Errorf("next = %d, want 30", next)
 	}
 	// Segments < 20 should be pruned; 20..29 kept (the live window).
 	for i := 0; i < 20; i++ {
 		if _, err := os.Stat(filepath.Join(tmpDir, fmt.Sprintf("seg-%06d.m4s", i))); !os.IsNotExist(err) {
 			t.Errorf("seg-%06d should have been pruned", i)
 		}
 	}
 	for i := 20; i < 30; i++ {
 		if _, err := os.Stat(filepath.Join(tmpDir, fmt.Sprintf("seg-%06d.m4s", i))); err != nil {
 			t.Errorf("seg-%06d should be kept: %v", i, err)
 		}
 	}
 }
 func TestLoadSharedHLSConfig(t *testing.T) {
 	prevDur := hlsSegmentDuration
 	prevWin := hlsWindowSize
 	defer func() {
 		hlsSegmentDuration = prevDur
 		hlsWindowSize = prevWin
 	}()
 	tmpDir := t.TempDir()
 	cfgPath := filepath.Join(tmpDir, "config.json")
 	if err := os.WriteFile(cfgPath, []byte(`{"hls_segment_duration":"4","hls_window_size":"12"}`), 0o644); err != nil {
 		t.Fatal(err)
 	}
 	os.Setenv("PLAYOUT_CONFIG_PATH", cfgPath)
 	defer os.Unsetenv("PLAYOUT_CONFIG_PATH")
 	loadSharedHLSConfig()
 	if hlsSegmentDuration != "4" {
 		t.Errorf("hlsSegmentDuration = %q, want 4", hlsSegmentDuration)
 	}
 	if hlsWindowSize != "12" {
 		t.Errorf("hlsWindowSize = %q, want 12", hlsWindowSize)
 	}
 }
 func TestLoadSharedHLSConfig_MissingFile(t *testing.T) {
 	prevDur := hlsSegmentDuration
 	prevWin := hlsWindowSize
 	defer func() {
 		hlsSegmentDuration = prevDur
 		hlsWindowSize = prevWin
 	}()
 	os.Setenv("PLAYOUT_CONFIG_PATH", filepath.Join(t.TempDir(), "nope.json"))
 	defer os.Unsetenv("PLAYOUT_CONFIG_PATH")
 	loadSharedHLSConfig() // should be a no-op without erroring
 	if hlsSegmentDuration != prevDur {
 		t.Errorf("hlsSegmentDuration changed to %q, want unchanged %q", hlsSegmentDuration, prevDur)
 	}
 }
@@ -3,8 +3,8 @@ set -e
 echo "=== Linear Void Playout Service Starting ==="
 echo "Playlist path: ${PLAYLIST_PATH:=/app/playlist/playlist.txt}"
-echo "HLS segment duration: ${HLS_SEGMENT_DURATION:-6}s"
+echo "HLS segment duration: ${HLS_SEGMENT_DURATION:-2}s"
-echo "HLS window size: ${HLS_WINDOW_SIZE:-24}"
+echo "HLS window size: ${HLS_WINDOW_SIZE:-12}"
 # Ensure playlist directory and file exist
 mkdir -p "$(dirname "$PLAYLIST_PATH")"
@@ -17,38 +17,7 @@ file '/app/media/demo2.mp4'
 EOF
 fi
-# Run normalization validation using the Go tool
+# Single source of truth: the Go binary validates the playlist (ADR-001/ADR-003
-echo "Validating playlist and enforcing normalization (ADR-001/ADR-003)..."
+# normalization enforcement) and runs the full loop (HLS, R2 sync, slate
-if ! /app/playlist-manager "$PLAYLIST_PATH"; then
+# fallback, health server). Validation runs once inside the binary.
-  echo "ERROR: Playlist validation failed. Check logs."
+exec /app/playlist-manager "$PLAYLIST_PATH"
  exit 1
 fi
 echo "Playlist validated successfully. Starting continuous HLS playout..."
 mkdir -p /app/hls
 rm -f /app/hls/playlist.m3u8 /app/hls/init.mp4 /app/hls/segment_*.ts /app/hls/segment_*.m4s
 # Run FFmpeg in a loop for continuous playback
 while true; do
  echo "[$(date)] Starting FFmpeg playout with browser-safe HLS encoding..."
  ffmpeg -re -f concat -safe 0 -i "$PLAYLIST_PATH" \
    -map 0:v:0 -map 0:a:0? \
    -vf "scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2,fps=30,format=yuv420p" \
    -c:v libx264 -preset veryfast -pix_fmt yuv420p \
    -profile:v high -level 4.0 \
    -r 30 -g 60 -keyint_min 60 -sc_threshold 0 \
    -c:a aac -ar 48000 -ac 2 -b:a 128k \
    -f hls \
    -hls_time "${HLS_SEGMENT_DURATION}" \
    -hls_list_size "${HLS_WINDOW_SIZE}" \
    -hls_segment_type fmp4 \
    -hls_fmp4_init_filename init.mp4 \
    -strftime 1 \
    -hls_flags delete_segments+independent_segments \
    -hls_segment_filename "/app/hls/segment_%Y%m%d_%H%M%S.m4s" \
    "/app/hls/playlist.m3u8" || echo "FFmpeg exited with error (will restart in 5s per ADR-001 resilience requirements)..."
  echo "Playout loop crashed or ended. Restarting in 5 seconds..."
  sleep 5
 done
@@ -0,0 +1,2 @@
 # Linear Void test playlist
 # No media entries here
@@ -0,0 +1 @@
@@ -0,0 +1,6 @@
 # Valid entries should still parse
 file '/app/media/demo1.mp4'
 # Invalid or malformed lines are preserved as literal paths by the parser
 not-a-file-entry
 file '/app/media/demo2.mp4'
@@ -0,0 +1,2 @@
 file '/app/media/demo1.mp4'
 file '/app/media/demo2.mp4'
@@ -11,6 +11,8 @@ services:
    restart: unless-stopped
    env_file:
      - .env
    ports:
      - "${PLAYOUT_PORT:-8081}:8081"
    volumes:
      - ./data/playlist:/app/playlist:rw
      - ./data/media:/app/media:ro
@@ -56,7 +58,7 @@ services:
    container_name: linearvoid-nginx
    restart: unless-stopped
    ports:
-      - "${NGINX_PORT:-8080}:80"
+      - "${NGINX_PORT:-8082}:80"
    volumes:
      - ./data/hls:/srv/hls:ro
    networks:
@@ -168,6 +170,8 @@ services:
    command:
      - "--config.file=/etc/prometheus/prometheus.yml"
      - "--storage.tsdb.path=/prometheus"
      - "--storage.tsdb.retention.time=30d"
      - "--storage.tsdb.retention.size=15GB"
      - "--web.console.libraries=/etc/prometheus/console_libraries"
      - "--web.console.templates=/etc/prometheus/consoles"
      - "--web.enable-lifecycle"
@@ -180,8 +184,7 @@ services:
      - "3001:3000"
    volumes:
      - grafana-data:/var/lib/grafana
-      - ./monitoring/grafana/dashboards:/etc/grafana/provisioning/dashboards
+      - grafana-provisioning:/etc/grafana/provisioning
      - ./monitoring/grafana/datasources:/etc/grafana/provisioning/datasources
    environment:
      - GF_SECURITY_ADMIN_USER=admin
      - GF_SECURITY_ADMIN_PASSWORD=${GRAFANA_PASSWORD:-admin}
@@ -201,3 +204,4 @@ volumes:
  prometheus-config:
  prometheus-data:
  grafana-data:
  grafana-provisioning:
@@ -13,6 +13,8 @@ services:
    restart: unless-stopped
    env_file:
      - .env
    ports:
      - "${PLAYOUT_PORT:-8081}:8081"
    volumes:
      - ./data/playlist:/app/playlist:ro
      - ./data/media:/app/media:ro
@@ -64,7 +66,7 @@ services:
    container_name: linearvoid-nginx
    restart: unless-stopped
    ports:
-      - "${NGINX_PORT:-8080}:80"
+      - "${NGINX_PORT:-8082}:80"
    volumes:
      - ./frontend/dist:/srv/frontend:ro
      - ./data/hls:/srv/hls:ro
@@ -162,6 +164,8 @@ services:
    command:
      - "--config.file=/etc/prometheus/prometheus.yml"
      - "--storage.tsdb.path=/prometheus"
      - "--storage.tsdb.retention.time=30d"
      - "--storage.tsdb.retention.size=15GB"
      - "--web.console.libraries=/etc/prometheus/console_libraries"
      - "--web.console.templates=/etc/prometheus/consoles"
      - "--web.enable-lifecycle"
@@ -0,0 +1,159 @@
 # Linear Void API Reference
 Base URLs: Public/admin app `https://linearvoid.tv` · WebSocket `wss://linearvoid.tv/ws` · Local fallback `http://localhost` / `ws://localhost/ws`
 ## Authentication
 Admin REST endpoints use a cookie session:
 - Cookie: `linearvoid_admin_session` — `HttpOnly`, `SameSite=Strict`, `Secure` when request is HTTPS (or `X-Forwarded-Proto=https`)
 - Session TTL: `ADMIN_SESSION_TTL_HOURS` (default 12h)
 ## Chat WebSocket API
 Connect: `GET /ws?username={name}&room={room}` — client/server exchange JSON messages.
 | Message (client→server) | Field                                                                            | Notes |
 | ----------------------- | -------------------------------------------------------------------------------- | ----- |
 | `type`                  | `public` for room chat, `private` for DM routing; `system` for moderation/events |       |
 | `room`                  | `main`; private DMs use `dm:userA-userB` (usernames sorted)                      |       |
 | `username`              | sender                                                                           |       |
 | `text`                  | message body                                                                     |       |
 Server→client envelope adds `"timestamp"` (ISO-8601, e.g. `2026-08-04T12:34:56Z`).
 ```json
 { "room": "main", "username": "viewer123", "text": "hello world", "type": "public" }
 ```
 ## Admin Session API
 | Method & Path            | Auth                                | Description                   |
 | ------------------------ | ----------------------------------- | ----------------------------- |
 | `POST /api/admin/login`  | none                                | Authenticate                  |
 | `POST /api/admin/logout` | optional (clears cookie either way) | Logout                        |
 | `GET /api/admin/session` | cookie required                     | Session check; 401 if invalid |
 Login request:
 ```json
 { "username": "admin", "password": "your-password" }
 ```
 Login/logout/session success response (session returns 401 on failure):
 ```json
 { "authenticated": true, "username": "admin" }
 ```
 Logout response: `{ "authenticated": false }`
 ## Admin Data API (auth required)
 | Method & Path                             | Returns                                                                                              |
 | ----------------------------------------- | ---------------------------------------------------------------------------------------------------- |
 | `GET /api/admin/overview`                 | Aggregate counters + runtime/system snapshot                                                         |
 | `GET /api/admin/playlist`                 | Playlist                                                                                             |
 | `PUT /api/admin/playlist`                 | Set playlist (body: `{ "content": "file '/app/media/video1.mp4'\nfile '/app/media/video2.mp4'\n" }`) |
 | `GET /api/admin/schedule`                 | Parsed playlist entries + matched media metadata/runtime                                             |
 | `GET /api/admin/moderation/logs?limit=50` | Moderation logs                                                                                      |
 | `POST /api/admin/moderation/actions`      | Perform moderation action                                                                            |
 | `GET /api/admin/analytics`                | Totals (messages, moderation actions, rooms) + top room summary                                      |
 | `GET /api/admin/system`                   | Health snapshot (chat/playout/redis/database) + config metadata                                      |
 | `GET /api/admin/users`                    | Presence users (room + username) when Redis available                                                |
 Moderation action request:
 ```json
 { "action": "mute", "target": "username-or-id", "moderator": "admin", "reason": "spam", "room": "main" }
 ```
 ## Media Library API
 | Method & Path                  | Description                                       |
 | ------------------------------ | ------------------------------------------------- |
 | `GET /api/admin/media`         | List media                                        |
 | `POST /api/admin/media`        | Multipart upload (legacy), form field name `file` |
 | `GET /api/admin/media/{id}`    | Get item                                          |
 | `PUT /api/admin/media/{id}`    | Update item                                       |
 | `DELETE /api/admin/media/{id}` | Delete item                                       |
 PUT media body:
 ```json
 { "status": "ready", "title": "My Clip", "tags": "music,live" }
 ```
 ## Resumable Upload API
 Max file size: **2GB** · Default chunk size: **8MB**
 | Method & Path                                                      | Description                                                       |
 | ------------------------------------------------------------------ | ----------------------------------------------------------------- |
 | `POST /api/admin/media/uploads`                                    | Initialize or resume session                                      |
 | `GET /api/admin/media/uploads/{uploadId}`                          | Check upload status                                               |
 | `PUT /api/admin/media/uploads/{uploadId}/chunk?index={chunkIndex}` | Upload chunk (`Content-Type: application/octet-stream`)           |
 | `POST /api/admin/media/uploads/{uploadId}/complete`                | Complete upload → returns media listing (`files` + `generatedAt`) |
 Initialize request:
 ```json
 {
  "uploadId": "optional-existing-id",
  "fileName": "clip.mp4",
  "fileSize": 123456789,
  "mimeType": "video/mp4",
  "chunkSize": 8388608,
  "totalChunks": 15
 }
 ```
 Status envelope (returned by init, status check, and chunk upload):
 ```json
 {
  "uploadId": "hex-token",
  "fileName": "clip.mp4",
  "fileSize": 123456789,
  "chunkSize": 8388608,
  "totalChunks": 15,
  "uploadedChunks": 3,
  "progress": 20
 }
 ```
 ## Metrics & Health
 - `GET /metrics` (chat) — Prometheus: connected clients, stored messages, moderation actions, Redis indicators, active admin sessions, build info
 - `GET /health` — chat service, playout service, and nginx reverse proxy each expose it
 ## HTTP Status Conventions
 | Code | Meaning               | When                                                        |
 | ---- | --------------------- | ----------------------------------------------------------- |
 | 200  | OK                    | Successful GET, PUT, action                                 |
 | 201  | Created               | Successful POST (upload init, override created)             |
 | 204  | No Content            | Successful DELETE, CORS preflight                           |
 | 400  | Bad Request           | Malformed JSON, missing required fields, invalid input      |
 | 401  | Unauthorized          | Missing/expired admin session                               |
 | 403  | Forbidden             | Valid session, insufficient permissions                     |
 | 404  | Not Found             | Resource doesn't exist                                      |
 | 405  | Method Not Allowed    | Wrong method for endpoint                                   |
 | 409  | Conflict              | Schedule override overlap, upload ID mismatch               |
 | 413  | Payload Too Large     | Upload exceeds 2 GB limit                                   |
 | 422  | Unprocessable         | File fails normalization check (codec, fps, resolution)     |
 | 429  | Too Many Requests     | Rate limit exceeded (chat, WS, login)                       |
 | 500  | Internal Server Error | Unexpected server failure                                   |
 | 503  | Service Unavailable   | Redis unavailable for user actions, playout health degraded |
 ## Rate Limiting
 Per-IP (from `X-Forwarded-For` or `RemoteAddr`) unless noted.
 | Resource              | Limit                              | Window                                   | Response                                               |
 | --------------------- | ---------------------------------- | ---------------------------------------- | ------------------------------------------------------ |
 | Chat messages         | `CHAT_RATE_LIMIT_MAX` (default 10) | `CHAT_RATE_LIMIT_WINDOW_S` (default 10s) | 429 + `{"type":"system","text":"Rate limit exceeded"}` |
 | WebSocket connections | 5                                  | 60s                                      | 429 + `"too many connections from this IP"`            |
 | Admin login           | 5                                  | 5min                                     | 429 + `"too many login attempts, try again later"`     |
 Rate limit headers (applicable responses): `X-RateLimit-Limit` (max requests/window), `Retry-After` (seconds until reset). 413 = payload too large; 500 = internal server error.
@@ -0,0 +1,148 @@
 # Coolify Deployment
 *Last Updated: 2026-08-28*
 Alternative deployment path for Linear Void using [Coolify](https://github.com/coollabsio/coolify/tree/v4.3.14) (v4.3.14), an open-source self-hostable PaaS that manages servers, apps, and databases over SSH. Drop-in alternative to the flows in [SETUP.md](./SETUP.md): local dev (`docker-compose.yml`) and test-lab/prod (`docker-compose.prod.yml` via Gitea Actions CD). Coolify deploys the same Compose stack through a web UI and its own Traefik reverse proxy for automatic HTTPS, domain routing, and one-click redeploys (no manual `DOCKER_HOST`).
 ## Why Coolify
 - **Single control plane**: manage playout, chat, nginx, redis, db (plus exporters/monitoring) from one dashboard.
 - **Automatic TLS**: Let's Encrypt provisioning/renewal per app/domain, replacing the manual Cloudflare + nginx origin TLS setup for the app hostname.
 - **No vendor lock-in**: config lives on your server; containers keep running if you stop using Coolify — you only lose automation.
 - **Simpler cutover**: on Hetzner VPS provisioning, point Coolify at the new server and redeploy instead of editing CD `DOCKER_HOST`.
 > Replaces the *deployment orchestration* layer only. Cloudflare DNS, R2 media bucket, cache rules, and the edge Worker from [SETUP.md](./SETUP.md) are unchanged.
 ## Prerequisites
 - Linux server with **Docker Engine** (any supported distro).
 - **SSH access** (root or passwordless `sudo`) from the Coolify install machine — Coolify provisions the target over SSH.
 - **2 GB RAM / 20 GB disk** minimum for Coolify itself (plus resources for the stack).
 - A domain pointed at the server for HTTPS (e.g. `linearvoid.tv`).
 - Ports `80` and `443` reachable for Traefik.
 - Gitea registry credentials (`CI_REGISTRY_USER` / `CI_REGISTRY_TOKEN`) if pulling prebuilt `playout`, `chat`, `nginx` images.
 ## Installation
 Recommended on a dedicated server:
 ```bash
 curl -fsSL https://cdn.coollabs.io/coolify/install.sh | bash
 ```
 The installer boots a Docker-based Coolify instance and prints the URL and default credentials. Complete first-run setup in the dashboard. For non-interactive/offline installs, see the [installation docs](https://coolify.io/docs/installation) and [install script source](https://github.com/coollabsio/coolify/blob/v4.3.14/scripts/install.sh).
 ## Add the Linear Void server
 1. **Servers → Add**.
 2. Choose your provider (or **Localhost** if Coolify runs on the same host as the stack).
 3. Provide SSH details; for a remote host Coolify validates and installs its agent.
 4. Confirm the server shows **Reachable** before creating resources.
 ### Current topology (verified 2026-08-30)
 Active test-lab setup is **two-tier**:
 | Component | Host | Exposes | Docker TCP | Notes |
 |---|---|---|---|---|
 | **Coolify dashboard** | `192.168.88.18` | `https://coolify.allucanget.biz` via Cloudflare tunnel (`coolify-cloudflared`); dashboard at `8000` | No | Manages target servers over SSH |
 | **Deployment target** | `192.168.88.40` | `coolify-proxy` = Traefik on 80/443; port `8000` bound by Portainer, not Coolify | Yes | Per-server helpers (`coolify-proxy`, `coolify-sentinel`, `coolify-cloudflared`) + the stack via `docker-compose.prod.yml` (`linearvoid` compose project, 11 containers) |
 The main `coolify` app container runs only on the dashboard host `192.168.88.18`; Compose-resource services land on the target `192.168.88.40`. The dashboard host exposes no Docker TCP socket, so run the checks below against the **target** `192.168.88.40`:
 ```bash
 ./scripts/check-env.sh      # env/deployment health on target (containers, helpers, health)
 ./scripts/check-tokens.sh   # Gitea registry, Cloudflare, R2, admin credential access
 ```
 ## Deploy the stack
 Deploy as a **Docker Compose** resource (not individual apps):
 1. **Projects → Add → Docker Compose**.
 2. Select the target server.
 3. In **Build Settings**, set the compose file source:
   - **Git Repository** → point at `https://git.allucanget.biz/zwitschi/linearvoid.git`, compose file `docker-compose.prod.yml` (Coolify pulls on each redeploy).
   - **Raw Compose** → paste `docker-compose.prod.yml` directly to manage manually.
 4. For the Git source, add the Gitea registry login as a **Deployment Key / environment secret** so `playout`, `chat`, `nginx` images can be pulled. Alternatively switch those services to `build:` blocks (as in `docker-compose.yml`) to build from source on the server.
 ### Environment variables
 Map Linear Void's `.env` values into Coolify's **Environment Variables** tab:
 | Variable | Purpose |
 |---|---|
 | `DATABASE_URL` | `postgres://linearvoid:<password>@db:5432/linearvoid?sslmode=disable` |
 | `REDIS_URL` | `redis://redis:6379/0` |
 | `POSTGRES_PASSWORD` | DB password (used by `db` service) |
 | `ADMIN_USERNAME` / `ADMIN_PASSWORD` | Admin panel credentials |
 | `ADMIN_SESSION_TTL_HOURS` | Admin session lifetime |
 | `R2_ACCESS_KEY_ID` / `R2_SECRET_ACCESS_KEY` | Cloudflare R2 credentials |
 | `R2_BUCKET_NAME` / `R2_ENDPOINT` / `R2_REGION` | R2 bucket config (`R2_REGION=auto`) |
 | `MEDIA_DOMAIN` | `media.linearvoid.tv` |
 | `VITE_PUBLIC_APP_URL` | `https://linearvoid.tv` |
 | `VITE_PUBLIC_WS_URL` | `wss://linearvoid.tv/ws` |
 | `VITE_PUBLIC_HLS_URL` | `https://media.linearvoid.tv/hls/playlist.m3u8` |
 Keep internal service URLs on compose hostnames (`redis`, `db`) exactly as in `docker-compose.prod.yml`.
 ### Persistent storage
 Named volumes (`redis-data`, `postgres-data`) and bind mounts under `./data` must be configured under **Persistent Storage** to survive redeploys:
 | Mount | Purpose |
 |---|---|
 | `data/playlist` | Playout playlist file |
 | `data/media` | Normalized source videos (read-only to playout) |
 | `data/hls` | Generated HLS manifests/segments |
 | `data/chat` | Chat service working data |
 | `data/slate` | Slate media |
 | `redis-data` | Redis append-only persistence |
 | `postgres-data` | PostgreSQL data directory |
 If Coolify doesn't auto-create the dirs, create them before first deploy:
 ```bash
 mkdir -p data/playlist data/media data/hls data/chat
 ```
 ### Domains and proxy
 1. Assign the **nginx** service a public domain (e.g. `linearvoid.tv`); Traefik terminates TLS and forwards to `nginx`.
 2. Set **Ports Exposes** so Traefik targets the nginx port (`80` inside container, mapped from `${NGINX_PORT:-8082}:80`).
 3. Do **not** publicly expose playout (`8081`) or chat (`3000`) health ports — keep them internal and route through nginx.
 4. For `media.linearvoid.tv`, keep serving HLS from the R2 custom domain (per SETUP.md) rather than routing through Coolify, so segments stay on Cloudflare's edge cache.
 ## Post-deploy verification
 - `docker compose ps` on the server shows all services healthy.
 - Playout health: `https://<host>/health` via nginx (internal `:8081/health`).
 - Chat health: internal `:3000/health`.
 - HLS written to `data/hls` and served from `media.linearvoid.tv`.
 - Chat WebSocket connects over `wss://linearvoid.tv/ws`.
 - Admin login works at `/admin` with configured credentials.
 ## Monitoring
 Coolify exposes container logs/basic metrics per resource. The stack ships Prometheus + Grafana (`monitoring/`) plus nginx/redis exporters. To reach them via Coolify, expose Grafana on a restricted subdomain (e.g. `grafana.linearvoid.tv`) and keep Prometheus internal, mirroring SETUP.md access guidance.
 ## Cutover from Gitea CD
 1. Deploy the stack as a Coolify compose resource (above).
 2. Point Cloudflare DNS for `linearvoid.tv` / `www` at the server IP (proxied).
 3. Disable (or keep as fallback) the `cd` job in the Gitea workflow so the two orchestrators don't fight over the same `DOCKER_HOST`.
 4. Keep the Gitea **CI** (build + push images) job so Coolify keeps pulling `:latest` from the registry.
 ## Troubleshooting
 - **Image pull fails**: set Gitea registry credentials in the compose secret store, or switch services to `build:` blocks.
 - **Healthchecks fail**: confirm `curl` exists in the built images (healthchecks rely on it).
 - **TLS errors**: check the domain's DNS points at the Coolify server and ports `80`/`443` are open.
 - **HLS not updating**: verify `data/hls` is writable and playout restarts cleanly; see SETUP.md normalization troubleshooting.
 - **Ports conflict**: Coolify's Traefik binds `80`/`443`; do not also map those to the host in the compose file.
 ## Further reading
 - Coolify repo (v4.3.14): <https://github.com/coollabsio/coolify/tree/v4.3.14>
 - Coolify docs: <https://coolify.io/docs>
 - [DEPLOYMENT.md](./DEPLOYMENT.md) · [SETUP.md](./SETUP.md)
@@ -0,0 +1,231 @@
 # Deployment Guide
 ## Environments
 | Environment    | Host                       | Docker Target              | Purpose                                        |
 | -------------- | -------------------------- | -------------------------- | ---------------------------------------------- |
 | **Test Lab**   | `192.168.88.40` (internal) | `tcp://192.168.88.40:2375` | Integration testing, staging, CI/CD validation |
 | **Production** | Hetzner VPS (TBD)          | `tcp://<hetzner-ip>:2375`  | Public linearvoid.tv                           |
 **Current state (2026-08-06):** Test lab is active and receives automated CD deploys. Production Hetzner VPS is **not yet provisioned**. `cd.yml` and `docker-compose.prod.yml` target the test lab; switching to production only requires changing `DOCKER_HOST`.
 ## Production Target (Hetzner)
 **Status: Not provisioned.** Plan documented and pipeline ready; only the VPS needs creation.
 ### Planned Infrastructure
 - Provider: Hetzner Cloud, Region: Ashburn, VA (us-east)
 - Instance: CX22 (2 vCPU, 4 GB RAM, 40 GB SSD) or equivalent
 - OS: Ubuntu 24.04 LTS or Debian 12
 - Bandwidth: 20 TB included traffic/month; Estimated cost: ~€7–10/month base
 ### Cutover Plan
 1. Provision Hetzner VPS
 2. Add production secrets to Gitea (`CI_PROD_*` prefix)
 3. Update `DOCKER_HOST` in CD workflow to Hetzner public IP
 4. Trigger deploy → validate health checks
 5. Update Cloudflare A record `linearvoid.tv` → Hetzner IP
 6. Enable HTTPS, WAF, cache rules on production zone
 7. Decommission test lab as public target
 ### Production Preflight (minimum readiness gate)
 1. Verify Hetzner host reachable over SSH and Docker remote API TLS works for the Gitea runner
 2. Confirm all production secrets exist under `CI_PROD_*` prefix
 3. Confirm `linearvoid.tv`, `www.linearvoid.tv`, `media.linearvoid.tv` DNS targets match intended phase
 4. Complete manual Cloudflare/UptimeRobot checklist (see `docs/operations/cloudflare-uptimerobot-checklist.md`)
 5. Run production smoke path end-to-end: viewer SPA, HLS playback, chat connect, admin login, upload, playlist save, playout health
 6. Verify rollback possible before final DNS switch
 ### Firewall / Security Group
 | Port | Source                | Purpose                        |
 | ---- | --------------------- | ------------------------------ |
 | 22   | Admin IPs             | SSH management                 |
 | 80   | 0.0.0.0/0             | HTTP (redirect to HTTPS)       |
 | 443  | 0.0.0.0/0             | HTTPS (nginx)                  |
 | 2375 | Gitea runner IP only  | Docker remote API (TLS)        |
 | 9090 | Admin IPs or internal | Prometheus (or tunnel via SSH) |
 | 3001 | Admin IPs or internal | Grafana (or tunnel via SSH)    |
 ### Pipeline Readiness
 | Workflow             | Trigger           | Purpose                                                                           |
 | -------------------- | ----------------- | --------------------------------------------------------------------------------- |
 | `ci.yml`             | Push to `main`    | Lint, build frontend, vet Go, build & push images (`:latest`, `:main`)            |
 | `cd.yml`             | Push to `main`    | Deploy to test lab (`192.168.88.40:2375`) — runs **in parallel** with CI          |
 | `release.yml`        | Tag push `*.*.*`  | Build & push versioned images (`:X.Y.Z`, `:X.Y`, `:latest`), create Gitea Release |
 | `workers-deploy.yml` | After CI succeeds | Deploy frontend to Cloudflare Workers                                             |
 CI and CD run simultaneously on every push to `main`. Deploy pulls whatever `:latest` images are available at that moment. `cd.yml` uses `DOCKER_HOST` to target the host:
 ```bash
 # Test lab (current)
 DOCKER_HOST=tcp://192.168.88.40:2375
 # Production (when provisioned)
 DOCKER_HOST=tcp://<hetzner-public-ip>:2375
 ```
 No pipeline code changes needed to switch targets.
 ## Target Topology
 - Host: Linux server with Docker Engine
 - Reverse proxy: nginx container (linearvoid-nginx)
 - Core services: playout, chat, redis, postgres
 - Observability: prometheus, grafana
 - CDN/edge: Cloudflare
 ## Prerequisites
 - Docker Engine + Docker Compose plugin
 - Network access to git.allucanget.biz
 - Valid `.env` file with production values
 - DNS configured for `linearvoid.tv` (and `media.linearvoid.tv` if split media domain used)
 ## Environment File
 `.env` requires at minimum:
 - `DATABASE_URL` — PostgreSQL connection string
 - `REDIS_URL` — Redis connection string
 - `ADMIN_USERNAME` / `ADMIN_PASSWORD` — admin dashboard credentials
 - `ADMIN_SESSION_TTL_HOURS` — session expiry (default 12)
 - `VITE_PUBLIC_APP_URL` / `VITE_PUBLIC_WS_URL` / `VITE_PUBLIC_HLS_URL` — frontend URLs
 **Cloudflare R2 (required for HLS segment sync to edge):**
 - `R2_ACCESS_KEY_ID` / `R2_SECRET_ACCESS_KEY`
 - `R2_BUCKET_NAME` (e.g. `linearvoid-media`)
 - `R2_ENDPOINT` — S3-compatible endpoint URL
 - `R2_REGION` — set to `auto`
 **Cloudflare (optional, for Workers):**
 - `CLOUDFLARE_API_TOKEN` / `CLOUDFLARE_ACCOUNT_ID`
 - `MEDIA_DOMAIN` — split media domain (e.g. `media.linearvoid.tv`)
 See `.env.example` and `SETUP.md` for full variable reference.
 ### Gitea Secrets
 `cd.yml` injects sensitive values from Gitea secrets into `.env` at deploy time. Configure in the Gitea repository:
 `DATABASE_URL`, `ADMIN_USERNAME`, `ADMIN_PASSWORD`, `R2_ACCESS_KEY_ID`, `R2_SECRET_ACCESS_KEY`, `R2_BUCKET_NAME`, `R2_ENDPOINT`, `R2_ADMIN_ACCESS_KEY_ID` (optional), `R2_ADMIN_SECRET_ACCESS_KEY` (optional), `R2_ADMIN_ENDPOINT` (optional), `CLOUDFLARE_API_TOKEN` (optional), `CLOUDFLARE_ACCOUNT_ID` (optional), `CI_REGISTRY_USER`, `CI_REGISTRY_TOKEN`
 ## Pull-and-Run Deployment
 Images are built/pushed automatically by CI and release workflows. Every push to `main` triggers CI (`:main`, `:latest`) and CD (deploys `:latest` to test lab) in parallel. Semantic version tags (`*.*.*`, e.g. `1.0.9`) trigger the release workflow (`:X.Y.Z`, `:X.Y`, `:latest` + Gitea Release).
 ```bash
 docker login git.allucanget.biz
 docker compose -f docker-compose.prod.yml pull
 docker compose -f docker-compose.prod.yml up -d --remove-orphans
 ```
 ## First-Time or Recovery Provisioning
 ```bash
 mkdir -p data/chat data/playlist data/media data/hls
 docker volume ls
 docker network ls
 docker compose -f docker-compose.prod.yml up -d
 ```
 ## Health Verification
 ```bash
 docker compose -f docker-compose.prod.yml ps
 ```
 Endpoint checks:
 - App: `http://{host}:8080/`
 - Nginx health: `http://{host}:8080/health`
 - Chat health: `http://{host}:3000/health`
 - Playout health: `http://{host}:8081/health`
 - Prometheus: `http://{host}:9090`
 - Grafana: `http://{host}:3001`
 Domain checks:
 - `https://linearvoid.tv`
 - `https://linearvoid.tv/admin`
 - `https://linearvoid.tv/metrics`
 ## Zero/Low-Downtime Update Pattern
 1. Pull newest images.
 2. Recreate changed services only:
   ```bash
   docker compose -f docker-compose.prod.yml pull
   docker compose -f docker-compose.prod.yml up -d nginx chat playout
   ```
 3. Re-run health checks.
 ## Rollback
 If new images are unhealthy:
 1. Pin previous tags in `docker-compose.prod.yml`.
 2. Pull pinned tags.
 3. Restart impacted services:
 ```bash
 docker compose -f docker-compose.prod.yml pull
 docker compose -f docker-compose.prod.yml up -d nginx chat playout
 ```
 ## Operational Tasks
 ```bash
 # View logs
 docker compose -f docker-compose.prod.yml logs -f nginx chat playout
 # Restart one service
 docker compose -f docker-compose.prod.yml restart chat
 # Stop stack (keep data)
 docker compose -f docker-compose.prod.yml down
 # Stop stack — destructive (remove data)
 docker compose -f docker-compose.prod.yml down -v
 ```
 ## Nginx and Proxy Considerations
 - If an external proxy (e.g. Nginx Proxy Manager) fronts the stack, align request body limits with internal nginx (see `infrastructure/nginx/nginx.conf`).
 - For resumable admin uploads, ensure `client_max_body_size` supports chunk requests in both proxy layers.
 ## Security Baseline
 - Use a strong `ADMIN_PASSWORD` and rotate regularly.
 - Keep Docker host access restricted.
 - Prefer HTTPS/WSS through Cloudflare.
 - Restrict exposed ports if only proxy access is needed.
 ## Common Deployment Pitfalls
 - Missing frontend build artifacts in local-only compose workflows.
 - Wrong registry credentials or missing login.
 - Misaligned domain env vars (app/ws/hls) causing mixed-origin errors.
 ## Troubleshooting
 | Symptom                    | Check                                         | Fix                                                           |
 | -------------------------- | --------------------------------------------- | ------------------------------------------------------------- |
 | Service not starting       | `docker logs linearvoid-<svc> --tail 50`      | Check `.env` vars, volume mounts, port conflicts              |
 | Playout stall / slate mode | `curl http://<host>:8081/health` — mode=slate | Check playlist file, media paths, disk space                  |
 | Chat not connecting        | `curl http://<host>:3000/health`              | Check Redis: `docker exec linearvoid-redis redis-cli ping`    |
 | Admin 401 loop             | Cookie not sent                               | Verify `X-Forwarded-Proto: https`, nginx auth_request headers |
 | Upload fails (413)         | File too large                                | Check nginx `client_max_body_size` (should be 64m+)           |
 | HLS not playing            | `curl http://<host>/hls/playlist.m3u8`        | Check playout health, HLS dir permissions                     |
 | Prometheus no targets      | `curl http://<host>:9090/targets`             | Verify container network, scrape config                       |
 | Grafana no data            | Check datasource                              | Verify Prometheus URL `http://prometheus:9090` provisioned    |
 Additional notes: proxy-layer body size limits can return 413 on upload; health checks may fail before service warmup completes.
@@ -52,6 +52,12 @@ Config: `monitoring/prometheus/prometheus.yml` (15s scrape interval)
 - **Linear Void app**: `monitoring/grafana/dashboard.json` — clients, messages, moderation, Redis, sessions, scrape health
 - **Prometheus ops**: `monitoring/grafana/dashboards/dashboard.json` — TSDB, CPU/memory, WAL, compactions, query latency
 ## Metrics Checking
 See detailed scripts for querying Prometheus scrape targets:
 - [Linux/macOS](./infrastructure/monitoring/prometheus_curl.md)
 ## Key Metrics
 - `linearvoid_chat_connected_clients` — active WebSocket connections
@@ -72,20 +78,13 @@ Config: `monitoring/prometheus/prometheus.yml` (15s scrape interval)
 | Prometheus targets down | Check container network: all must be on `linearvoid-net`             |
 | Alert not firing        | Check Prometheus → Alerts tab, verify `rule_files` in prometheus.yml |
-### Grafana shows no data
+**Grafana no data**: ensure datasource points to `http://prometheus:9090`; confirm Prometheus is healthy; check dashboard query labels match active jobs.
- Ensure datasource points to <http://prometheus:9090>.
+**High cardinality / slow queries**: reduce unneeded labels; limit expensive panels; tune retention and query windows.
 - Confirm Prometheus is healthy.
 - Check dashboard query labels match active jobs.
 ### High cardinality or query slowness
 - Reduce unneeded labels.
 - Limit expensive dashboard panels.
 - Tune retention and query windows.
 ## Operational Recommendations
 - Keep alert thresholds tied to actual user impact.
 - Review dashboards after each release that changes endpoints or metrics names.
 - Periodically test alert routing and incident response flow.
 - Retention: **30 days** time-based plus **15GB** size cap (`--storage.tsdb.retention.time=30d --storage.tsdb.retention.size=15GB` on the `prometheus` service in `docker-compose.yml` and `docker-compose.prod.yml`). Increase the size cap before extending the time window so the TSDB does not hit the disk limit first.
@@ -0,0 +1,55 @@
 # Docs Folder
 This folder contains the documentation for the Linear Void project. The documentation is organized into several markdown files, each covering different aspects of the project.
 ## Architecture
 - [Architecture](architecture/README.md) - High-level system architecture and component interactions.
 ## Infrastructure
 - Cloudflare
  - [Cache Rules](./infrastructure/cloudflare/cache-rules.md) - Cache rules for Cloudflare Workers.
  - [Account Troubleshooting](./infrastructure/cloudflare/cloudflare-account-troubleshooting.md) - Troubleshooting Cloudflare account issues.
 - Monitoring
  - [Prometheus CURL](./infrastructure/monitoring/prometheus_curl.md) - Prometheus metrics endpoint testing with curl and jq. Doocumentation of available metrics and their meanings.
 ## API
 - [API](API.md) - Implemented WebSocket and REST API reference.
 ## Deployment
 - [Deployment](DEPLOYMENT.md) - Production deployment and operational runbook.
 ## Monitoring
 - [Monitoring](MONITORING.md) - Metrics, dashboards, and monitoring troubleshooting.
 ## Security
 - [Security](SECURITY.md) - Security model, controls, and hardening baseline.
 ## Setup
 - [Setup](SETUP.md) - Test lab setup, local development, and CI/CD workflow.
 ## Streaming
 - [Streaming](STREAMING.md) - Streaming architecture, playout, and delivery details.
 ## Additional Resources
 - [Marketing](marketing/README.md) - Marketing materials and resources.
 - [Operations](operations/README.md) - Operational procedures and checklists.
 - [Incident Runbook](incident-runbook.md) - Incident response and disaster recovery procedures.
 ## Other Documents
 - [CHANGELOG](../CHANGELOG.md) - Release notes and version history.
 - [CONTRIBUTING](../CONTRIBUTING.md) - Contribution guidelines and code of conduct.
 - [TODO](../.github/instructions/TODO.md) - Active implementation plan with checkboxes.
 - [Backlog](../.github/instructions/BACKLOG.md) - Consolidated list of all development tasks.
 - [Agents](../.github/AGENTS.md) - Instructions for agents and task management.
 - [Memory](../.github/MEMORY.md) - Session memory and development progress tracking.
 - [README](../README.md) - Project overview and high-level information.
@@ -0,0 +1,150 @@
 # Linear Void Setup Guide
 **Last Updated**: 2026-08-03
 Prerequisites, environment setup, and running the app locally and in production. Architecture: [`docs/architecture/README.md`](./architecture/README.md).
 ## Prerequisites
 - **Docker + Docker Compose** — runs the full stack (playout, chat, nginx, redis, db, prometheus, grafana).
 - **Node.js 22+ / npm** — frontend dev and builds (`cd frontend && npm install && npm run build`).
 - **Go 1.25+** — working on the Go services outside Docker.
 - **FFmpeg** — playout HLS generation (`apt install ffmpeg`).
 - **Git**.
 - **Cloudflare account** — R2 storage + CDN.
 - **Gitea account** — image registry + CI/CD. Set Actions secrets at `https://git.allucanget.biz/zwitschi/linearvoid/settings/actions/secrets`: `CI_REGISTRY_USER`, `CI_REGISTRY_TOKEN` (scope `write:packages`), `ADMIN_USERNAME`, `ADMIN_PASSWORD`, `DATABASE_URL`.
 - **Hetzner Cloud (optional, prod)** — US-East VPS (Ashburn, VA per ADR-001).
 ## Network Environments
 Two distinct targets; know which one you're using.
 ```mermaid
 flowchart LR
    subgraph Test_Lab["Test Lab (192.168.88.0/24)"]
        TEST_HOST["192.168.88.40<br/>Docker Engine :2375"]
    end
    subgraph Prod["Production (Hetzner — NOT provisioned)"]
        PROD_HOST["Hetzner CX22 Ashburn, VA<br/>Public IP TBD"]
    end
    subgraph Gitea["Gitea CI/CD"]
        CI["CI: build + push images"]
        CD["CD: deploy via DOCKER_HOST"]
    end
    subgraph CF["Cloudflare"]
        DNS["linearvoid.tv"]
        R2["R2 Bucket"]
    end
    CD -->|"DOCKER_HOST=tcp://192.168.88.40:2375"| TEST_HOST
    CD -.->|"DOCKER_HOST=tcp://&lt;hetzner-ip&gt;:2375 (when provisioned)"| PROD_HOST
    TEST_HOST -->|"test traffic"| DNS
    PROD_HOST -.->|"production traffic"| DNS
    TEST_HOST --> R2
    PROD_HOST -.-> R2
 ```
 - **Test Lab (active):** internal `192.168.88.0/24`, host `192.168.88.40`; receives automated CD deploys from Gitea Actions. Used for staging validation.
 - **Production (pending):** Hetzner CX22, Ashburn VA — not yet provisioned. Compose/CD are ready; only `DOCKER_HOST` needs changing. See [DEPLOYMENT.md](./DEPLOYMENT.md).
 ## Environment Setup
 1. `git clone https://git.allucanget.biz/zwitschi/linearvoid.git && cd linearvoid`
 2. `cp .env.example .env` then replace placeholders.
 3. Compose overrides: `docker-compose.yml` builds images locally and mounts `frontend/dist` into nginx; `docker-compose.prod.yml` pulls prebuilt images from Gitea.
   - Internal URLs use compose hostnames: `REDIS_URL=redis://redis:6379/0`, `DATABASE_URL=postgres://linearvoid:<pw>@db:5432/linearvoid?sslmode=disable`.
   - Public routing: `VITE_PUBLIC_APP_URL=https://linearvoid.tv`, `VITE_PUBLIC_WS_URL=wss://linearvoid.tv/ws`, `VITE_PUBLIC_HLS_URL=https://media.linearvoid.tv/hls/playlist.m3u8`.
 4. Create data dirs: `mkdir -p data/playlist data/media data/hls data/chat`
 5. Optional: place normalized MP4s in `data/media/` and create `data/playlist/playlist.txt` (see ADR-001 for normalization).
 ## Gitea Setup
 1. User with repo + registry access; generate a token (scope `write:packages`) stored as `CI_REGISTRY_TOKEN`.
 2. Set Actions secrets (see Prerequisites) to enable automated CI/CD and deploys.
 3. Set registry vars: `CI_REGISTRY_URL`, `CI_REGISTRY_NAMESPACE` (e.g. `zwitschi/linearvoid`), `CI_REGISTRY_USER`.
 4. Auth: `docker login git.allucanget.biz`.
 5. Local dev builds from source; prod pulls `playout`, `chat`, `nginx` images from the registry namespace. Verify `:latest` tags exist before rollout.
 ## Cloudflare R2 Setup
 1. Create R2 bucket (e.g. `linearvoid-media`, matching `R2_BUCKET_NAME`); generate an access key pair → `R2_ACCESS_KEY_ID`, `R2_SECRET_ACCESS_KEY`, `R2_REGION=auto`.
 2. S3 endpoint: `https://<account-id>.r2.cloudflarestorage.com` → `R2_ENDPOINT`.
 3. Attach `media.linearvoid.tv` as custom media domain → `MEDIA_DOMAIN`; add CORS allowing `https://linearvoid.tv` GET for HLS delivery.
 4. Point `linearvoid.tv` (+ `www` redirect) at the app entrypoint; keep `media.*` on R2. Proxied DNS, TLS **Full (strict)**.
 5. Apply the `.m4s`/`.m3u8` cache rules from [`cache-rules.md`](./infrastructure/cloudflare/cache-rules.md); enable Smart Tiered Cache; deploy the [`linearvoid-media` worker](../infrastructure/cloudflare/) on `media.linearvoid.tv` (replace the R2 bucket's direct custom-domain binding on that host) to enforce immutable segment caching + HLS CORS.
 6. Verify: `aws s3 ls --endpoint-url $R2_ENDPOINT`; check cache hit ratio after serving traffic.
 ## Running the Application
 ### Local development
 ```bash
 docker compose up --build      # start all services
 docker compose down            # stop
 ```
 Access: app/admin `https://linearvoid.tv` (via proxy) or `http://localhost`; WS `wss://linearvoid.tv/ws` / `ws://localhost/ws`. Health: playout `:8081/health`, chat `:3000/health`. Monitoring: Prometheus `:9090`, Grafana `:3001` (default `admin/admin`).
 Frontend dev (optional): `cd frontend && npm install && npm run dev` (http://localhost:5173, proxies API). For nginx-backed local runs: `npm run build` (nginx serves `frontend/dist`).
 ### Test lab (remote Docker host)
 Deploy to `192.168.88.40` over Docker's TCP socket (port `2375`).
 Enable TCP on Alpine host — edit `/etc/conf.d/docker`:
 ```bash
 DOCKER_OPTS="-H unix:///var/run/docker.sock -H tcp://0.0.0.0:2375"
 ```
 Then `rc-service docker restart`; verify with `netstat -tlnp | grep 2375`; allow port `2375` from `192.168.88.0/24` in the firewall.
 Deploy from a machine with the Docker CLI:
 ```bash
 export DOCKER_HOST="tcp://192.168.88.40:2375"
 docker info                                   # confirm remote host
 docker compose -f docker-compose.prod.yml pull
 docker compose -f docker-compose.prod.yml up -d --remove-orphans   # registry images
 # or build from source: docker compose up -d --build
 unset DOCKER_HOST                             # back to local
 ```
 Health: `http://192.168.88.40:8081/health` (playout), `:3000/health` (chat), nginx entrypoint `:8080`.
 ### Coolify deployment
 Coolify replaces the Gitea CD `DOCKER_HOST` orchestration (Cloudflare DNS/R2/cache unchanged). Install (`curl -fsSL https://cdn.coollabs.io/coolify/install.sh | bash`), add the target server via SSH, create a Docker Compose resource from `docker-compose.prod.yml` (or the repo), configure env vars in Coolify's store, map persistent `data/` and named volumes, and assign `linearvoid.tv` to nginx for Traefik TLS. Full walkthrough: [`COOLIFY.md`](./COOLIFY.md).
 ### Production setup
 1. Provision a Linux VPS (Docker, Compose, Git); open HTTP/HTTPS ports.
 2. `git clone … && cd linearvoid && cp .env.example .env`.
 3. Set production `.env`: strong `POSTGRES_PASSWORD`/`GRAFANA_PASSWORD`, compose-hostname internal URLs, `MEDIA_DOMAIN=media.linearvoid.tv`, public `VITE_PUBLIC_*` URLs. For local-only testing bypassing the proxy, use `http://localhost`/`ws://localhost/ws`/`http://localhost/hls/playlist.m3u8`.
 4. `mkdir -p data/playlist data/media data/hls data/chat`.
 5. Ensure `playout`, `chat`, `nginx` images exist in the registry; `docker login` from the VPS.
 6. Deploy: `docker compose -f docker-compose.prod.yml pull && docker compose -f docker-compose.prod.yml up -d`.
 7. Verify: `docker compose -f docker-compose.prod.yml ps`, health endpoints, HLS written to `data/hls`, media domain serves via Cloudflare.
 8. Harden: HTTPS in front of nginx (Cloudflare, `www` → apex), restrict Grafana/Prometheus to trusted IPs, run under systemd for auto-start.
 ### Production (Hetzner VPS + Cloudflare)
 1. Provision CX22 in Ashburn, VA (ADR-001).
 2. Cloudflare: R2 bucket (`enam` hint), deploy the [`linearvoid-media` worker](../infrastructure/cloudflare/) on `media.linearvoid.tv` + cache rules, `linearvoid.tv`/`www` at the app entrypoint with `www`→apex redirect, Full (strict) TLS.
 3. Deploy from the project: `docker compose -f docker-compose.prod.yml up -d` (or pull from Gitea registry); manage under systemd.
 4. Monitoring: Grafana dashboards from `monitoring/grafana/`.
 See `docs/architecture/README.md` (arc42) and the ADRs for decisions and cost/scaling guidance (ADR-001).
 ## Troubleshooting
 - **R2 upload fails** — check `.env` creds/bucket; `aws s3 ls --endpoint-url=$R2_ENDPOINT`.
 - **Normalization errors** — run `backend/playout/start-playout.sh` to see ffprobe output. Video must be H.264/AAC, 30 fps constant, 2s keyframes (ADR-001).
 - **Chat won't connect** — check Redis and WS URL; `/health` should return 200.
 - **Cache not working** — verify `.m4s` long-TTL / `.m3u8` short-TTL cache rules and hit ratio.
 - **Docker issues** — `docker compose logs`; check port conflicts.
 - **Admin interface** — `ADMIN_USERNAME`, `ADMIN_PASSWORD`, `ADMIN_SESSION_TTL_HOURS` set; session-based login protects `/admin/` and `/api/admin/*`.
 - **Prod pull fails** — `docker login` to Gitea succeeded and image tags exist.
 ## Further Reading
 Architecture: `docs/architecture/README.md` · Decisions: `docs/architecture/adr/` (ADR-001…007) · Contributing: `CONTRIBUTING.md` · Overview: root `README.md`.
@@ -0,0 +1,189 @@
 # Streaming Pipeline
 Operational contract for Linear Void video ingest, playout, publication, caching, and browser playback. Deployment, chat, admin details live in `DEPLOYMENT.md`, `SETUP.md`, `API.md`.
 ## Production flow
 ```mermaid
 flowchart TD
    A["Normalized MP4 assets"] --> B["Playlist and schedule"]
    B --> C["Playout service and FFmpeg"]
    C --> D["Local HLS staging"]
    D --> E["R2 object storage"]
    E --> F["Cloudflare edge"]
    F --> G["hls.js or native HLS"]
 ```
 The playout service is the timeline authority. It reads the ordered playlist, runs FFmpeg continuously, stages a live HLS window under `data/hls/`, and publishes complete objects to R2. Viewers read only the public R2 custom domain through Cloudflare:
 ```text
 https://media.linearvoid.tv/hls/playlist.m3u8
 ```
 Nginx `/hls/` is a local/test fallback, not the production origin. The SPA, admin API, and chat use `linearvoid.tv`; media uses `media.linearvoid.tv`.
 ## Source-media contract
 Only validated files may enter the production playlist.
 | Property   | Required profile                                                        |
 | ---------- | ----------------------------------------------------------------------- |
 | Container  | MP4                                                                     |
 | Video      | H.264/AVC, `yuv420p`                                                    |
 | Resolution | 1280x720 or 1920x1080; avoid resolution changes within a playlist block |
 | Frame rate | Constant 30 fps                                                         |
 | GOP        | Closed, fixed 2 seconds: `-g 60 -keyint_min 60 -sc_threshold 0`         |
 | Audio      | AAC-LC, stereo, 48 kHz, 128–192 kbit/s                                  |
 The ingest gate uses `ffprobe` to reject incompatible codecs, variable frame rate, missing audio, invalid dimensions, or wrong keyframe cadence. Assets are immutable after acceptance; corrections create a new asset ID/object key.
 Reference normalization:
 ```bash
 ffmpeg -i input.mov \
  -c:v libx264 -preset medium -crf 21 \
  -r 30 -g 60 -keyint_min 60 -sc_threshold 0 \
  -pix_fmt yuv420p \
  -c:a aac -b:a 160k -ar 48000 -ac 2 \
  -movflags +faststart \
  output-normalized.mp4
 ```
 ## Playlist and timeline
 - `data/playlist/playlist.txt`: one local media path per line; blank lines and `#` comments ignored.
 - Service validates the complete playlist before activating a revision.
 - Playlist edits are atomic and get a revision ID. The active FFmpeg run keeps its current item and adopts the new revision at the next item boundary.
 - All viewers follow the same live manifest; clients never calculate the schedule independently.
 - Schedule metadata derives from the same active revision/timeline so "now/next" agrees with the video.
 - When the last item ends, playout returns to the first unless an active schedule override says otherwise.
 ## Playout and HLS packaging
 The playout service wraps FFmpeg, tracks the active item/revision, restarts failed processes, and exposes `/health` plus Prometheus metrics.
 | Setting          | Value                                                                    |
 | ---------------- | ------------------------------------------------------------------------ |
 | Protocol         | Standard live HLS, not LL-HLS                                            |
 | Segment format   | fMP4 (`.m4s`) with init segment; `.ts` may be supported during migration |
 | Segment target   | 2 seconds (`HLS_SEGMENT_DURATION=2`)                                     |
 | Live window      | 12 segments (`HLS_WINDOW_SIZE=12`), ~24 seconds                          |
 | Codec path       | Stream copy for conforming assets; no per-viewer transcoding             |
 | Expected latency | 15–35 seconds                                                            |
 Segment boundaries must align with keyframes; timestamps must stay monotonic across item boundaries. If FFmpeg cannot preserve a seamless timeline, insert `#EXT-X-DISCONTINUITY` and publish the corresponding new init segment.
 **Segment duration rationale**: 2s lowers latency and keeps the window small (12 × 2s = 24s) while staying above the manifest TTL (1–2s). The 2s GOP (30fps, `-g 60`) already matches the target, so segments cut cleanly on keyframes. Longer (4–6s) raises latency and window depth; shorter than 2s inflates segment/request overhead and R2 Class B ops with little gain.
 Every segment name is globally unique and never reused, including after restart or playlist loop — use a run/session ID plus a monotonically increasing media sequence:
 ```text
 hls/r-20260807T170412Z/init-000001.mp4
 hls/r-20260807T170412Z/seg-000001234.m4s
 ```
 A URL advertised as immutable must never later contain different bytes.
 ## Safe publication to R2
 Order prevents a manifest referencing an unavailable segment:
 1. FFmpeg writes a segment to a temp local name and closes it.
 2. Publisher uploads the init segment (if new) and media segment to final immutable R2 keys.
 3. Verify upload success; record object size/checksum.
 4. Render the next manifest referencing only confirmed objects.
 5. Upload the manifest to a temp key, then replace `hls/playlist.m3u8` as the final commit step.
 Never upload an actively written segment or publish the manifest first. Use a single publisher (or fencing/leader election) so two workers can't update the live manifest concurrently.
 **Run-scoped manifest URIs.** Segments and the init file are stored run-scoped under `hls/r-{runID}/…`, so the live `hls/playlist.m3u8` must reference them with that run prefix. Before the final commit step, the publisher rewrites each bare relative media URI (segments plus `#EXT-X-MAP:URI`) to `r-{runID}/<name>`. `publishManifest` in `backend/playout/src/playlist.go` does this via `rewriteManifestToRun`, using the same `runID` under which the segments were uploaded; the rewrite is skipped in slate mode (its manifest is served as-is). The published manifest therefore contains, e.g.:
 ```m3u8
 #EXT-X-MAP:URI="r-20260807T170412Z/init.mp4"
 #EXTINF:2.000000,
 r-20260807T170412Z/seg-000001234.m4s
 ```
 The `linearvoid-media` Worker on `media.linearvoid.tv` is a faithful path→R2 mapper and serves these run-scoped paths directly; it does **not** rewrite URIs at serve time.
 `data/hls/` is regenerable staging. Source media, playlist revisions, and schedule state are authoritative; generated HLS is not backed up as application state.
 ## Cache contract
 | Objects                    | Edge policy                 | Browser policy                          | Required headers/behavior                                                    |
 | -------------------------- | --------------------------- | --------------------------------------- | ---------------------------------------------------------------------------- |
 | `.m4s`, `.ts`, init `.mp4` | Cache eligible; TTL 1 year  | TTL 1 year                              | `Cache-Control: public, max-age=31536000, immutable`; full path in cache key |
 | Live `.m3u8`               | Cache eligible; edge TTL 2s | Do not retain beyond freshness interval | `Cache-Control: public, max-age=1, s-maxage=2, must-revalidate`              |
 | Versioned JS/CSS           | Cache eligible; TTL 1 year  | TTL 1 year                              | Content-hashed filenames and `immutable`                                     |
 Further rules:
 - No query-string cache busters on segment URLs; uniqueness belongs in the path.
 - Cache keys preserve hostname and full path; ignore only explicitly approved tracking params.
 - HLS responses need `Access-Control-Allow-Origin: https://linearvoid.tv` (or reviewed allowlist), `GET`/`HEAD`/`OPTIONS`, and correct MIME types.
 - Enable Smart Tiered Cache for `media.linearvoid.tv` to cut R2 reads on regional misses.
 - Purge manifests when necessary, never immutable segments during normal operation.
 - Retain expired-window segments at least max manifest TTL + retry/grace time; practical minimum 1 hour; lifecycle deletion may run later per storage policy.
 Validation:
 ```bash
 curl -I https://media.linearvoid.tv/hls/playlist.m3u8
 curl -I https://media.linearvoid.tv/hls/<segment>.m4s
 ```
 The manifest must refresh within seconds; repeated segment requests should progress `CF-Cache-Status: MISS` → `HIT`, keep the same ETag/content length, and carry the immutable cache header.
 ## Player behavior
 SPA uses native HLS where supported, hls.js elsewhere.
 - Firefox has no native HLS → hls.js/MSE path; fMP4 (`.m4s` + init) is supported. Autoplay needs `muted` + `playsinline`, already set on the `<video>` element.
 - Start at the live edge with a conservative buffer; do not seek to playlist start.
 - Treat the manifest as the sync source; target ~3 segments behind the newest unless testing supports a smaller margin.
 - Recover transient network/media errors with bounded retries + exponential backoff.
 - On fatal hls.js network error, reload the manifest; on fatal media error, attempt media recovery once before recreating the player.
 - If tab suspension/drift leaves playback materially behind the target, seek forward rather than play the backlog.
 - Surface a clear reconnecting state; never silently loop stale media.
 - Schedule/chat timestamps should account for measured player latency, not wall-clock playout.
 ## Failure and recovery
 The service retries an item failure with bounded backoff. Past the failure threshold it switches to a pre-normalized looping slate and reports `mode=slate`, periodically retrying normal playout, returning only after a segment and committed manifest publish successfully.
 On process/host restart:
 - create a new run/session ID and continue with unique segment paths;
 - resume from schedule-derived current position when reliable state exists, else start the current playlist item;
 - never overwrite old segment objects;
 - keep the last valid manifest available until the replacement is playable;
 - emit a discontinuity when timeline continuity isn't guaranteed.
 `/health` must report more than "process running": at least mode (`live`/`slate`/`starting`/`degraded`), active item, playlist revision, run ID, last segment sequence/time, last successful R2 publication, consecutive failures, uptime. Mark unhealthy if the manifest or media sequence hasn't advanced for more than two segment durations.
 ## Monitoring and acceptance
 Monitor/alert on: manifest age and media-sequence advancement; time since last published segment; FFmpeg restarts and consecutive failures; live/slate mode; R2 upload latency/errors; segment 404/5xx and manifest/segment latency; Cloudflare cache-hit ratio, origin requests, R2 Class B ops; player startup, fatal errors, rebuffer ratio, live-edge drift; local staging disk usage.
 A release is streaming-ready only when: one full playlist boundary plays without timestamp errors; the manifest never references a missing object; a second viewer joins the same timeline; cache headers match the table; a forced FFmpeg failure activates slate; and normal playout recovers without reusing an object URL.
 ## Required configuration
 | Variable                                   | Purpose                               |
 | ------------------------------------------ | ------------------------------------- |
 | `PLAYLIST_PATH`                            | Active playlist file                  |
 | `HLS_SEGMENT_DURATION`                     | Target segment duration; baseline `2` |
 | `HLS_WINDOW_SIZE`                          | Manifest window; baseline `12`        |
 | `R2_ENDPOINT`, `R2_REGION`                 | S3-compatible publication endpoint    |
 | `R2_BUCKET_NAME`                           | Media bucket                          |
 | `R2_ACCESS_KEY_ID`, `R2_SECRET_ACCESS_KEY` | Write credentials, publisher only     |
 | `R2_KEEP_RUNS`                             | Run folders to retain (default `2`)   |
 | `R2_MAX_RETENTION_BYTES`                   | Max bytes across run folders (10 GiB) |
 | `MEDIA_DOMAIN`                             | Public R2 custom domain               |
 | `VITE_PUBLIC_HLS_URL`                      | Public live manifest URL              |
 Production values: `MEDIA_DOMAIN=media.linearvoid.tv`, `VITE_PUBLIC_HLS_URL=https://media.linearvoid.tv/hls/playlist.m3u8`. Local fallback may use `http://localhost/hls/playlist.m3u8`.
 ## Explicitly deferred
 ABR ladders, LL-HLS, DVR/catch-up, multi-origin playout, and regional chat affinity are outside the v1 contract. Adding any requires an ADR and an update to this document.
@@ -19,11 +19,11 @@ We require a completely independent 24/7 linear video channel that broadcasts a
 **Key distinctions**:
 - **Playout**: Continuous scheduled program from playlist.
- **Packaging**: FFmpeg → standard HLS (`.m3u8` + `.ts` segments, 4–6s duration).
+- **Packaging**: FFmpeg → standard HLS (`.m3u8` + `.m4s` segments, 4–6s duration).
 - **Delivery**: Immutable segments served via Cloudflare edge caching + R2 (zero egress cost).
 - **Interaction**: Separate lightweight WebSocket service for chat.
-Bandwidth (not storage or compute) is the dominant cost driver. A single viewer at ~4 Mbps consumes ~1.3–1.8 TB/month; 100 concurrent viewers = ~130–180 TB/month. Direct VPS delivery is only viable for PoC/small audiences.
+Bandwidth (not storage or compute) is the dominant cost driver. A single viewer at ~4 Mbps consumes ~1.3–1.8 TB/month; 100 concurrent viewers = ~130–180 TB/month. Direct VPS delivery is only viable for PoC/small audiences. HLS segments are typically `.m4s` files, with `.m4s` being the default for fMP4 segments.
 ## Decision Drivers
@@ -31,7 +31,7 @@ Bandwidth (not storage or compute) is the dominant cost driver. A single viewer
 2. Full independence and ownership (no video platform lock-in).
 3. Strong US performance and low latency.
 4. True/near-true synchronization via live-style HLS (not pure VOD).
-5. Aggressive immutable caching of `.ts` segments to achieve near-zero egress.
+5. Aggressive immutable caching of `.m4s` segments to achieve near-zero egress.
 6. Browser-native playback (`hls.js` + native HLS).
 7. Lightweight, maintainable stack with modest operational complexity.
 8. Support for custom multi-room + private chat with persistence and moderation.
@@ -58,9 +58,9 @@ Adopt a **self-managed US-East playout + Cloudflare R2 + edge-cached HLS** archi
 ### 2. Storage & Delivery (Cloudflare R2 + CDN)
- HLS segments (`.ts`) and manifests uploaded to **Cloudflare R2** (Eastern North America hint `enam`).
+- HLS segments (`.m4s`) and manifests uploaded to **Cloudflare R2** (Eastern North America hint `enam`).
- Custom domain (`media.example.com`) fronted by Cloudflare with **Cache Rules**:
+- Custom domain (`media.linearvoid.tv`) fronted by Cloudflare with **Cache Rules**:
-  - `*.ts` (and init `.mp4` if using fMP4 later): `Cache Everything`, immutable, Edge TTL 24h–1yr (`Cache-Control: public, max-age=31536000, immutable`).
+  - `*.m4s` (and init `.mp4` if using fMP4 later): `Cache Everything`, immutable, Edge TTL 24h–1yr (`Cache-Control: public, max-age=31536000, immutable`).
  - `*.m3u8`: Short TTL (1–10s) or `must-revalidate` (`Cache-Control: public, max-age=1..10, must-revalidate`).
  - Master playlist: TTL ~30s.
  - Tiered Cache enabled where possible.
@@ -69,7 +69,7 @@ Adopt a **self-managed US-East playout + Cloudflare R2 + edge-cached HLS** archi
 ### 3. Frontend
- Static SPA (HTML/CSS/JS + Tailwind + Alpine.js or vanilla) hosted on Cloudflare Pages or same VPS/Nginx.
+- Static SPA (HTML + custom CSS + vanilla JS) hosted on Cloudflare Workers or same VPS/Nginx.
 - Video player: `hls.js` (Chromium/Firefox) or native HLS (Safari). Single live `master.m3u8`.
 - Embedded chat sidebar with room switcher, private DMs, now-playing overlay.
@@ -82,7 +82,7 @@ Adopt a **self-managed US-East playout + Cloudflare R2 + edge-cached HLS** archi
 ### 5. Infrastructure Summary & Cost Model
- **Primary**: Hetzner Ashburn VPS (playout + chat + Nginx) + Cloudflare R2 + Pages.
+- **Primary**: Hetzner Ashburn VPS (playout + chat + Nginx) + Cloudflare R2 + Workers.
 - **Monitoring**: MediaMTX/SRS dashboard, UptimeRobot, systemd logs, Cloudflare analytics.
 - **Backup**: Weekly R2/S3-compatible snapshots of playlist, DB, config.
 - **Fallback**: Emergency slate/loop playlist, automated restart.
@@ -90,7 +90,7 @@ Adopt a **self-managed US-East playout + Cloudflare R2 + edge-cached HLS** archi
 **Initial Targets**:
- Protocol: Standard HLS (`.ts` segments). Defer LL-HLS/CMAF/WebRTC.
+- Protocol: Standard HLS (`.m4s` segments). Defer LL-HLS/CMAF/WebRTC.
 - Max rendition: 720p30 initially (upgrade to 1080p30 or ABR later).
 - Latency: 15–35s (acceptable for linear programming/chat).
@@ -25,7 +25,7 @@ We must explicitly document language/runtime choices per module and the assumpti
 | Layer               | Technology                                 | Language                | Rationale                                                                                                              |
 | ------------------- | ------------------------------------------ | ----------------------- | ---------------------------------------------------------------------------------------------------------------------- |
-| **Frontend SPA**    | HTML + Tailwind + Alpine.js + hls.js       | TypeScript / JavaScript | Minimal bundle, excellent HLS support, fast iteration. Vite for build.                                                 |
+| **Frontend SPA**    | HTML + custom CSS + vanilla JS + hls.js    | TypeScript / JavaScript | Minimal bundle, excellent HLS support, fast iteration. Vite for build.                                                 |
 | **Playout Service** | FFmpeg + MediaMTX (or SRS)                 | Bash + Go (wrapper)     | FFmpeg is the proven tool for continuous playlist HLS. Go wrapper for reliability and monitoring.                      |
 | **Chat Backend**    | Go (preferred) or Node.js + Socket.io      | Go                      | High-performance WebSockets, low memory, excellent Redis/PostgreSQL clients. Node.js acceptable for rapid prototyping. |
 | **Shared Code**     | TypeScript definitions + Go structs        | TS + Go                 | Clear contracts between frontend and backend.                                                                          |
@@ -38,7 +38,7 @@ We must explicitly document language/runtime choices per module and the assumpti
 1. All video assets **must** be normalized before being added to any playlist (H.264, AAC, 30 fps constant, 2s keyframes, CRF encoding).
 2. Deployment is **Docker-first**; services will be containerized.
-3. Cloudflare is the primary CDN and will be configured with specific Cache Rules (`.ts` immutable long TTL, `.m3u8` short TTL).
+3. Cloudflare is the primary CDN and will be configured with specific [Cache Rules](../../infrastructure/cloudflare/cache-rules.md) for HLS segments and manifests.
 4. Chat does **not** require end-to-end encryption in v1 (separate ADR if needed).
 5. Single VPS origin initially; multi-region is a later evolution.
 6. Monitoring focuses on playout health, cache hit ratio, and R2 operation counts.
@@ -19,7 +19,7 @@ This interface must be lightweight, secure, and integrated with the playout serv
 ## Decision Drivers
-1. **Lightweight & Maintainable** – Prefer server-rendered or minimal JS (HTMX + Tailwind) over heavy SPA frameworks to align with ADR-003's "lightweight" principle.
+1. **Lightweight & Maintainable** – Prefer server-rendered or minimal JS (HTMX + custom CSS) over heavy SPA frameworks to align with ADR-003's "lightweight" principle.
 2. **Security** – Strict authentication, file type/size validation, and R2 upload permissions.
 3. **Usability** – Drag-and-drop playlist editor, progress indicators for normalization and upload, real-time playout status.
 4. **Integration** – Must call playout service APIs for validation and playlist updates; upload directly to R2 with metadata.
@@ -31,7 +31,7 @@ Create a dedicated **admin web interface** in a new `frontend/admin/` directory
 **Tech Stack (per ADR-003)**:
- **Frontend**: HTMX + Tailwind CSS + Alpine.js (minimal JS, server-rendered HTML). Alternative: React if complex interactions are needed later.
+- **Frontend**: HTMX + custom CSS + minimal JS (server-rendered HTML). Alternative: React if complex interactions are needed later.
 - **Backend**: Go (or Node.js) API endpoints exposed by the playout service or a dedicated `backend/admin/` service.
 - **Authentication**: JWT or session-based (admin roles only). Use Cloudflare Access or simple OAuth for production.
 - **File Handling**: Upload → validate with ffprobe (codec, fps, keyframes, duration) → normalize if needed → store in R2 with metadata.
@@ -48,7 +48,7 @@ Create a dedicated **admin web interface** in a new `frontend/admin/` directory
 **Folder Placement** (per ADR-002):
- `frontend/admin/` – Admin-specific HTML/JS components (HTMX + Tailwind).
+- `frontend/admin/` – Admin-specific HTML/JS components (HTMX + custom CSS).
 - `backend/admin/` – Dedicated API handlers for validation, playlist updates, and configuration (or extend playout/chat services).
 - Protected route in nginx with authentication (JWT or Cloudflare Access).
 - Documentation and API specs added to `docs/architecture/`.
@@ -95,7 +95,7 @@ Create a dedicated **admin web interface** in a new `frontend/admin/` directory
 - ADR-001: Normalization requirements, HLS playout, R2 usage.
 - ADR-002: Folder structure (admin UI belongs under frontend or a protected route).
- ADR-003: Lightweight frontend preference (HTMX/Tailwind over heavy frameworks).
+- ADR-003: Lightweight frontend preference (HTMX/custom CSS over heavy frameworks).
 - arc42 documentation: Building Block View (admin as part of the overall system).
 This ADR ensures all admin interface decisions are documented before code is written.
@@ -17,7 +17,7 @@ These interfaces must be secure, auditable, and integrated with the chat backend
 ## Decision Drivers
-1. **Consistency** – Use the same lightweight tech stack decided in ADR-004 (HTMX + Tailwind + Alpine.js) to avoid introducing new frameworks.
+1. **Consistency** – Use the same lightweight tech stack decided in ADR-004 (HTMX + custom CSS + vanilla JS) to avoid introducing new frameworks.
 2. **Security & Auditability** – All actions must require admin authentication and be logged immutably.
 3. **Real-time Needs** – Moderation dashboard should show live chat activity (WebSocket integration).
 4. **Simplicity** – Analytics should use existing Prometheus/Grafana data where possible rather than building a duplicate system.
@@ -29,7 +29,7 @@ Extend the admin interface started in ADR-004 with additional protected sections
 **Tech Stack (consistent with ADR-003 and ADR-004)**:
- **Frontend**: HTMX + Tailwind + Alpine.js for all admin pages. Shared layout with sidebar navigation.
+- **Frontend**: HTMX + custom CSS + vanilla JS for all admin pages. Shared layout with sidebar navigation.
 - **Backend**: Go API endpoints (protected by JWT/session middleware) in `backend/admin/` or extended from the chat/playout services.
 - **Authentication**: Role-based (admin, moderator, viewer). Use Cloudflare Access or JWT with short expiry for production.
 - **Data Sources**:
@@ -54,7 +54,7 @@ Extend the admin interface started in ADR-004 with additional protected sections
 ## Rationale
- Reusing HTMX/Tailwind from ADR-004 keeps the admin interface lightweight and consistent.
+- Reusing HTMX/custom CSS from ADR-004 keeps the admin interface lightweight and consistent.
 - Centralizing admin functionality under `/admin/` reduces maintenance overhead.
 - Leveraging Prometheus/Grafana for analytics avoids duplicating metrics collection.
 - Immutable audit logging supports future compliance and moderation review (key requirement for a public chat system).
@@ -94,7 +94,7 @@ Extend the admin interface started in ADR-004 with additional protected sections
 - ADR-001: Chat features, moderation requirements, monitoring needs.
 - ADR-002: Folder structure – admin UI belongs under `frontend/admin/`.
- ADR-003: Lightweight frontend (HTMX/Tailwind) and Go backend preference.
+- ADR-003: Lightweight frontend (HTMX/custom CSS) and Go backend preference.
 - ADR-004: Video admin interface (shared layout and authentication approach).
 - arc42 documentation: Cross-cutting Concepts (security, monitoring) and Building Block View (admin as extension of the system).
@@ -26,10 +26,10 @@ contributors. See <https://arc42.org>.
 +-------------+---------------------------+---------------------------+
 | Role/Name | Contact | Expectations |
 +=============+===========================+===========================+
-| *           | *\<Contact-1\>*           | *\<Expectation-1\>*       |
+| * | _\<Contact-1\>_ | _\<Expectation-1\>_ |
 | \<Role-1\>* | | |
 +-------------+---------------------------+---------------------------+
-| *           | *\<Contact-2\>*           | *\<Expectation-2\>*       |
+| * | _\<Contact-2\>_ | _\<Expectation-2\>_ |
 | \<Role-2\>* | | |
 +-------------+---------------------------+---------------------------+
@@ -57,41 +57,41 @@ contributors. See <https://arc42.org>.
 ## Whitebox Overall System {#_whitebox_overall_system}
-***\<Overview Diagram\>***
+_**\<Overview Diagram\>**_
 Motivation
-:   *\<text explanation\>*
+: _\<text explanation\>_
 Contained Building Blocks
-:   *\<Description of contained building block (black boxes)\>*
+: _\<Description of contained building block (black boxes)\>_
 Important Interfaces
-:   *\<Description of important interfaces\>*
+: _\<Description of important interfaces\>_
 ### \<Name black box 1\> {#_name_black_box_1}
-*\<Purpose/Responsibility\>*
+_\<Purpose/Responsibility\>_
-*\<Interface(s)\>*
+_\<Interface(s)\>_
-*\<(Optional) Quality/Performance Characteristics\>*
+_\<(Optional) Quality/Performance Characteristics\>_
-*\<(Optional) Directory/File Location\>*
+_\<(Optional) Directory/File Location\>_
-*\<(Optional) Fulfilled Requirements\>*
+_\<(Optional) Fulfilled Requirements\>_
-*\<(optional) Open Issues/Problems/Risks\>*
+_\<(optional) Open Issues/Problems/Risks\>_
 ### \<Name black box 2\> {#_name_black_box_2}
-*\<black box template\>*
+_\<black box template\>_
 ### \<Name black box n\> {#_name_black_box_n}
-*\<black box template\>*
+_\<black box template\>_
 ### \<Name interface 1\> {#_name_interface_1}
@@ -101,42 +101,42 @@ Important Interfaces
 ## Level 2 {#_level_2}
-### White Box *\<building block 1\>* {#_white_box_building_block_1}
+### White Box _\<building block 1\>_ {#_white_box_building_block_1}
-*\<white box template\>*
+_\<white box template\>_
-### White Box *\<building block 2\>* {#_white_box_building_block_2}
+### White Box _\<building block 2\>_ {#_white_box_building_block_2}
-*\<white box template\>*
+_\<white box template\>_
 ...
-### White Box *\<building block m\>* {#_white_box_building_block_m}
+### White Box _\<building block m\>_ {#_white_box_building_block_m}
-*\<white box template\>*
+_\<white box template\>_
 ## Level 3 {#_level_3}
 ### White Box \<\_building block x.1\_\> {#_white_box_building_block_x_1}
-*\<white box template\>*
+_\<white box template\>_
 ### White Box \<\_building block x.2\_\> {#_white_box_building_block_x_2}
-*\<white box template\>*
+_\<white box template\>_
 ### White Box \<\_building block y.1\_\> {#_white_box_building_block_y_1}
-*\<white box template\>*
+_\<white box template\>_
 # Runtime View {#section-runtime-view}
 ## \<Runtime Scenario 1\> {#_runtime_scenario_1}
-   *\<insert runtime diagram or textual description of the scenario\>*
+- _\<insert runtime diagram or textual description of the scenario\>_
-   *\<insert description of the notable aspects of the interactions
+- _\<insert description of the notable aspects of the interactions
-    between the building block instances depicted in this diagram.\>*
+  between the building block instances depicted in this diagram.\>_
 ## \<Runtime Scenario 2\> {#_runtime_scenario_2}
@@ -148,51 +148,51 @@ Important Interfaces
 ## Infrastructure Level 1 {#_infrastructure_level_1}
-***\<Overview Diagram\>***
+_**\<Overview Diagram\>**_
 Motivation
-:   *\<explanation in text form\>*
+: _\<explanation in text form\>_
 Quality and/or Performance Features
-:   *\<explanation in text form\>*
+: _\<explanation in text form\>_
 Mapping of Building Blocks to Infrastructure
-:   *\<description of the mapping\>*
+: _\<description of the mapping\>_
 ## Infrastructure Level 2 {#_infrastructure_level_2}
-### *\<Infrastructure Element 1\>* {#_infrastructure_element_1}
+### _\<Infrastructure Element 1\>_ {#_infrastructure_element_1}
-*\<diagram + explanation\>*
+_\<diagram + explanation\>_
-### *\<Infrastructure Element 2\>* {#_infrastructure_element_2}
+### _\<Infrastructure Element 2\>_ {#_infrastructure_element_2}
-*\<diagram + explanation\>*
+_\<diagram + explanation\>_
 ...
-### *\<Infrastructure Element n\>* {#_infrastructure_element_n}
+### _\<Infrastructure Element n\>_ {#_infrastructure_element_n}
-*\<diagram + explanation\>*
+_\<diagram + explanation\>_
 # Cross-cutting Concepts {#section-concepts}
-## *\<Concept 1\>* {#_concept_1}
+## _\<Concept 1\>_ {#_concept_1}
-*\<explanation\>*
+_\<explanation\>_
-## *\<Concept 2\>* {#_concept_2}
+## _\<Concept 2\>_ {#_concept_2}
-*\<explanation\>*
+_\<explanation\>_
 ...
-## *\<Concept n\>* {#_concept_n}
+## _\<Concept n\>_ {#_concept_n}
-*\<explanation\>*
+_\<explanation\>_
 # Architecture Decisions {#section-design-decisions}
@@ -209,7 +209,7 @@ Mapping of Building Blocks to Infrastructure
 +----------------------+-----------------------------------------------+
 | Term | Definition |
 +======================+===============================================+
-| *\<Term-1\>*         | *\<definition-1\>*                            |
+| _\<Term-1\>_ | _\<definition-1\>_ |
 +----------------------+-----------------------------------------------+
-| *\<Term-2\>*         | *\<definition-2\>*                            |
+| _\<Term-2\>_ | _\<definition-2\>_ |
 +----------------------+-----------------------------------------------+
@@ -4,155 +4,101 @@ Triage order for Linear Void incidents. Work top-to-bottom — each tier depends
 ## Triage Order
-1. Edge Reachability (Cloudflare)
+1. **Edge Reachability** (Cloudflare)
-2. Origin Health (VPS/Docker)
+2. **Origin Health** (VPS/Docker)
-3. Playout Progression (HLS)
+3. **Playout Progression** (HLS)
-4. Chat Connectivity (WebSocket)
+4. **Chat Connectivity** (WebSocket)
-5. Data-Plane (Redis/DB)
+5. **Data-Plane** (Redis/DB)
 ## 1. Edge Reachability (Cloudflare)
 **Symptoms:** `linearvoid.tv` not resolving, SSL errors, 5xx from Cloudflare.
 ```bash
 # Check DNS
 dig linearvoid.tv
 dig www.linearvoid.tv
 # Check Cloudflare status
 curl -I https://linearvoid.tv/health
 ```
-**Common causes:**
+**Common causes:** DNS misconfiguration (A record → wrong IP); Cloudflare proxy disabled (grey cloud exposes origin); SSL certificate expired (Cloudflare → SSL/TLS); Cloudflare outage ([cloudflarestatus.com](https://www.cloudflarestatus.com)).
- DNS misconfiguration (A record pointing to wrong IP)
+**Mitigation:** Verify A record points `linearvoid.tv` → origin IP (proxied, orange cloud). Bypass Cloudflare temporarily:
 - Cloudflare proxy disabled (grey cloud → origin exposed directly)
 - SSL certificate expired (check Cloudflare dashboard → SSL/TLS)
 - Cloudflare outage → check [https://www.cloudflarestatus.com](https://www.cloudflarestatus.com)
-**Mitigation:**
+```bash
-
+curl -H "Host: linearvoid.tv" http://<origin-ip>/health
- Verify A record: `linearvoid.tv` → origin IP (proxied, orange cloud)
+```
 - Bypass Cloudflare temporarily: `curl -H "Host: linearvoid.tv" http://<origin-ip>/health`
 ## 2. Origin Health (VPS/Docker)
-**Symptoms:** Cloudflare returns 502/504, containers down.
+**Symptoms:** Cloudflare 502/504, containers down.
 ```bash
 # Remote Docker (test lab)
 docker -H tcp://192.168.88.40:2375 ps
 docker -H tcp://192.168.88.40:2375 logs linearvoid-nginx --tail 50
 # Direct health check
 curl http://192.168.88.40/health
 ```
-**Common causes:**
+**Common causes:** Host disk full (`df -h`); Docker daemon stopped (`systemctl status docker`); container restart loop (`docker ps -a --filter "status=exited"`); OOM (`dmesg | grep -i oom`).
 - Host out of disk space: `df -h`
 - Docker daemon stopped: `systemctl status docker`
 - Container restart loop: `docker ps -a --filter "status=exited"`
 - Resource exhaustion (OOM): `dmesg | grep -i oom`
 **Mitigation:**
- Restart stack: `docker compose -f docker-compose.prod.yml up -d`
+```bash
- Free disk: `docker system prune -f`
+docker compose -f docker-compose.prod.yml up -d   # restart stack
- Check logs per service: `docker logs linearvoid-<service> --tail 100`
+docker system prune -f                            # free disk
 docker logs linearvoid-<service> --tail 100       # per-service logs
 ```
 ## 3. Playout Progression (HLS)
 **Symptoms:** Viewer sees slate or buffering, playlist not advancing.
 ```bash
-# Check playout health
+curl http://192.168.88.40:8081/health             # "mode": "live" or "slate"
 curl http://192.168.88.40:8081/health
 # Response includes "mode": "live" or "slate"
 # Check HLS output
 curl -I http://192.168.88.40/hls/playlist.m3u8
 ls -la data/hls/
 # Check playout logs
 docker logs linearvoid-playout --tail 100
 ```
-**Common causes:**
+**Common causes:** FFmpeg crash → slate fallback (health `degraded`); playlist empty/missing (`cat data/playlist/playlist.txt`); media file missing (`ls data/media/`); disk full → HLS segments can't write.
- FFmpeg crash → slate fallback active (health shows `degraded`)
+**Mitigation:** Validate playlist entries and media paths; restart playout (`docker compose restart playout`); regenerate demo playlist if empty (see `backend/playout/start-playout.sh`).
 - Playlist file empty/missing: `cat data/playlist/playlist.txt`
 - Media file missing from playlist: `ls data/media/`
 - Disk full → HLS segments can't write
 **Mitigation:**
 - Verify playlist has valid entries
 - Check media files exist at paths in playlist
 - Restart playout: `docker compose restart playout`
 - Generate demo playlist if empty: see `backend/playout/start-playout.sh`
 ## 4. Chat Connectivity (WebSocket)
 **Symptoms:** Chat not loading, messages not sending, presence broken.
 ```bash
 # Check chat health
 curl http://192.168.88.40:3000/health
 # Test WebSocket
 wscat -c ws://192.168.88.40/ws?username=test&room=main
 # Check chat logs
 docker logs linearvoid-chat --tail 100
 ```
-**Common causes:**
+**Common causes:** Redis down → presence/rate-limiting degraded (chat still works); DB down → messages not persisting; port not exposed (`docker port linearvoid-chat`).
- Redis down → presence/rate-limiting degraded (chat still works)
+**Mitigation:** Restart chat (`docker compose restart chat`); check Redis (`docker exec linearvoid-redis redis-cli ping`); check DB (`docker exec linearvoid-db pg_isready -U linearvoid`). Chat degrades gracefully without Redis — look for "Redis connection warning" in logs.
 - Database down → messages not persisting
 - Port not exposed: `docker port linearvoid-chat`
 **Mitigation:**
 - Restart chat: `docker compose restart chat`
 - Check Redis: `docker exec linearvoid-redis redis-cli ping`
 - Check DB: `docker exec linearvoid-db pg_isready -U linearvoid`
 - Chat works without Redis (graceful degradation) — check logs for "Redis connection warning"
 ## 5. Data-Plane (Redis/DB)
 **Symptoms:** Chat works but no persistence/presence, admin stats empty.
 ```bash
 # Redis
 docker exec linearvoid-redis redis-cli ping
 docker exec linearvoid-redis redis-cli info memory
 # PostgreSQL
 docker exec linearvoid-db pg_isready -U linearvoid
 docker exec linearvoid-db psql -U linearvoid -c "SELECT count(*) FROM messages;"
 ```
-**Common causes:**
+**Common causes:** Redis OOM (check `maxmemory`); PostgreSQL connection limit; disk full on volume mount.
- Redis OOM (check `maxmemory` setting)
+**Mitigation:** Restart redis (`docker compose restart redis`, AOF persist enabled); restart db (`docker compose restart db`); restore from backup (see `scripts/verify-backups.sh`).
 - PostgreSQL connection limit reached
 - Disk full on volume mount
 **Mitigation:**
 - Redis: `docker compose restart redis` (AOF persist enabled)
 - PostgreSQL: `docker compose restart db`
 - Restore from backup: see `scripts/verify-backups.sh` for procedure
 ## Escalation
 | Severity | When                                 | Action                                      |
-| -------- | ------------------------------------ | -------------------------------------------------- |
+| -------- | ------------------------------------ | ------------------------------------------- |
 | Critical | Slate active >30min, complete outage | Trigger DR plan, provision fallback host    |
-| Warning  | Redis down, high CPU >30min          | Investigate during business hours, restart service |
+| Warning  | Redis down, high CPU >30min          | Investigate business hours, restart service |
-| Info     | Single service blip                  | Monitor, no action unless recurring                |
+| Info     | Single service blip                  | Monitor; no action unless recurring         |
 ## Post-Incident
@@ -161,4 +107,54 @@ docker exec linearvoid-db psql -U linearvoid -c "SELECT count(*) FROM messages;"
 3. Add prevention to docs if actionable
 4. Update this runbook if new failure mode discovered
-**Recovery targets:** RPO ≤24h, RTO ≤60min. Quarterly DR drill: simulate host loss, restore from backup.
+## Quarterly Disaster Recovery Drill
 Validate recovery targets under controlled host-loss simulation: **RPO ≤ 24h, RTO ≤ 60min**.
 ### Prerequisites
 - Latest backups from `scripts/backup-db.sh` and `scripts/backup-weekly.sh`
 - Operator access to Docker host and DNS controls
 - Current deployment variables (`.env`, compose file, image tags)
 ### Scope
 - Simulate complete origin loss (all app containers unavailable)
 - Rebuild stack on clean host
 - Restore DB and media/playlist mounts
 - Verify viewer playback, chat, admin auth, monitoring targets
 ### Steps
 1. Record drill start timestamp and on-call participants.
 2. Capture pre-drill baseline:
   ```bash
   curl -fsS http://<origin>/health
   curl -fsS http://<origin>:3000/health
   curl -fsS http://<origin>:8081/health
   ```
 3. Simulate outage: `docker compose -f docker-compose.prod.yml down`
 4. Provision clean recovery host (or clean test-lab VM); copy deployment bundle.
 5. Restore data paths: `data/playlist/`, `data/media/`, `data/chat/`, `data/hls/` (optional warm cache).
 6. Restore database from latest backup dump.
 7. Start stack: `docker compose -f docker-compose.prod.yml up -d`
 8. Validate health and runtime:
   ```bash
   docker ps --format "table {{.Names}}\t{{.Status}}"
   curl -fsS http://<origin>/health
   curl -fsS http://<origin>/hls/playlist.m3u8 | head -n 5
   curl -fsS http://<origin>:9090/-/ready
   ```
 9. Validate app behavior: viewer SPA loads and HLS plays; WebSocket chat connects with message round-trip; admin login/session endpoint succeeds.
 10. Run backup integrity check: `scripts/verify-backups.sh`
 11. Record drill end timestamp; compute measured RTO/RPO.
 ### Pass/Fail Criteria
 - **Pass:** all core services healthy and functional in ≤ 60 min.
 - **Pass:** latest recoverable data point ≤ 24 h old.
 - **Fail:** any critical path remains degraded (playout, chat, admin auth, monitoring).
 ### Evidence Template
 Record in incident tracker: date/time window; environment (test-lab, staging, production); backup artifact IDs and timestamps; measured RTO and RPO; issues found and remediation owner; follow-up ticket links.
@@ -0,0 +1,25 @@
 # Cloudflare Cache Rules for Linear Void (per ADR-001)
 ## Recommended Cache Rules for media.linearvoid.tv
 1. **.m4s and .ts segments (immutable)**
   - Expression: (http.host eq "media.linearvoid.tv" and (http.request.uri.path contains ".ts" or http.request.uri.path contains ".m4s"))
   - Cache status: Eligible for cache
   - Edge Cache TTL: 1 month (or `Cache-Control: public, max-age=31536000, immutable` from origin)
   - Cache Everything: Yes
 2. **.m3u8 manifests (live)**
   - Expression: (http.host eq "media.linearvoid.tv" and http.request.uri.path contains ".m3u8")
   - Cache status: Eligible for cache
   - Edge Cache TTL: 2 seconds
   - Cache-Control: public, max-age=2, must-revalidate
 3. **Static assets**
   - Expression: (http.host eq "linearvoid.tv" and http.request.uri.path contains ".js" or http.request.uri.path contains ".css")
   - Edge Cache TTL: 1 year (with hash in filename for immutable caching)
 **Tiered Cache**: Enable Smart Tiered Cache for R2 custom domain to reduce origin requests.
 **WAF**: Enable basic rate limiting and bot management for /ws and admin routes.
 These rules ensure high cache hit ratio for .m4s and .ts segments while keeping live manifests fresh. Monitor cache hit ratio in Cloudflare analytics.
@@ -0,0 +1,24 @@
 # Cloudflare Account Troubleshooting
 Reference for Cloudflare account and API token troubleshooting.
 Use `wrangler whoami` to verify the account ID and API token are valid, or query the Workers API at `https://api.cloudflare.com/client/v4/accounts/${CLOUDFLARE_ACCOUNT_ID}/workers/scripts`.
 ## Validate Cloudflare account and API token
 ```bash
 # Validate Cloudflare account and API token in .env
 cd /path/to/linearvoid
 grep -E 'CLOUDFLARE_API_TOKEN|CLOUDFLARE_ACCOUNT_ID' .env
 # Test API token with wrangler
 npx wrangler whoami
 # Or verify with the Workers API directly
 export CLOUDFLARE_API_TOKEN="$(grep '^CLOUDFLARE_API_TOKEN=' .env | cut -d= -f2-)"
 export CLOUDFLARE_ACCOUNT_ID="$(grep '^CLOUDFLARE_ACCOUNT_ID=' .env | cut -d= -f2-)"
 # List all Workers for the account
 curl -X GET "https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/workers/scripts" \
  -H "Authorization: Bearer $CLOUDFLARE_API_TOKEN" -H "Content-Type: application/json"
 ```
@@ -0,0 +1,62 @@
 # Prometheus scrape target metric names
 Here are ready‑to‑run **cURL** commands you can use to query each Prometheus scrape target and list the metric names they expose.  
 The Prometheus HTTP API endpoint `http://localhost:9090/api/v1/label/__name__/values` returns all metric names currently known for the target’s job/instance.
 ## 1. Chat (`http://chat:3000/metrics`)
 [Browse `chat`](http://192.168.88.40:9090/api/v1/label/__name__/values?match[]={job=%22chat%22})
 ```bash
 curl -s 'http://localhost:9090/api/v1/label/__name__/values?match[]={job="chat",instance="chat:3000"}' | jq .
 ```
 see [Prometheus Results](./prometheus_results.md#chat-metrics) for full output of all 20+ metric names exposed by the Chat service.
 ## 2. NGINX exporter (`http://nginx-exporter:9113/metrics`)
 ```bash
 curl -s 'http://localhost:9090/api/v1/label/__name__/values?match[]={job="nginx",instance="nginx-exporter:9113"}' | jq .
 ```
 see [Prometheus Results](./prometheus_results.md#nginx-metrics) for full output of all 40+ metric names exposed by the NGINX exporter.
 ## 3. Node exporter (`http://node-exporter:9100/metrics`)
 ```bash
 curl -s 'http://localhost:9090/api/v1/label/__name__/values?match[]={job="node",instance="node-exporter:9100"}' | jq .
 ```
 see [Prometheus Results](./prometheus_results.md#node-metrics) for full output of all 200+ metric names exposed by the Node exporter.
 ## 4. Playout (`http://playout:8081/metrics`)
 ```bash
 curl -s 'http://localhost:9090/api/v1/label/__name__/values?match[]={job="playout",instance="playout:8081"}' | jq .
 ```
 see [Prometheus Results](./prometheus_results.md#playout-metrics) for full output of all 10+ metric names exposed by the Playout service.
 ## 5. Postgres exporter (`http://postgres-exporter:9187/metrics`)
 ```bash
 curl -s 'http://localhost:9090/api/v1/label/__name__/values?match[]={job="postgres",instance="postgres-exporter:9187"}' | jq .
 ```
 see [Prometheus Results](./prometheus_results.md#postgres-metrics) for full output of all 100+ metric names exposed by the Postgres exporter.
 ## 6. Prometheus itself (`http://prometheus:9090/metrics`)
 ```bash
 curl -s 'http://localhost:9090/api/v1/label/__name__/values?match[]={job="prometheus",instance="prometheus:9090"}' | jq .
 ```
 see [Prometheus Results](./prometheus_results.md#prometheus-metrics) for full output of all 100+ metric names exposed by Prometheus itself.
 ## 7. Redis exporter (`http://redis-exporter:9121/metrics`)
 ```bash
 curl -s 'http://localhost:9090/api/v1/label/__name__/values?match[]={job="redis",instance="redis-exporter:9121"}' | jq .
 ```
 see [Prometheus Results](./prometheus_results.md#redis-metrics) for full output of all 100+ metric names exposed by the Redis exporter.
@@ -0,0 +1,124 @@
 # Prometheus Metrics — Linear Void
 Raw scrape-target metric inventories captured for the monitoring setup. This file
 lists which metric names are exposed by each target. No threshold values, alert
 rules, or query results are present beyond the metric inventory itself.
 Standard boilerplate metrics are exposed by every Go-based target and are omitted
 below where noted: `go_*` (gc/memstats/sched/goroutines), `process_*` (cpu, fds,
 memory, network), `promhttp_metric_handler_*`, and Prometheus scrape internals
 (`scrape_duration_seconds`, `scrape_samples_scraped`, `scrape_samples_post_metric_relabeling`,
 `scrape_series_added`, `up`).
 ## Chat Target (`linearvoid_chat_*`)
 Application metrics for the chat service:
 - `linearvoid_chat_admin_sessions_active`
 - `linearvoid_chat_build_info`
 - `linearvoid_chat_connected_clients`
 - `linearvoid_chat_dms_total`
 - `linearvoid_chat_messages_total`
 - `linearvoid_chat_moderation_actions_total`
 - `linearvoid_chat_redis_connected_clients`
 - `linearvoid_chat_redis_enabled`
 - `linearvoid_chat_redis_memory_max_bytes`
 - `linearvoid_chat_redis_memory_usage_ratio`
 - `linearvoid_chat_redis_memory_used_bytes`
 - `linearvoid_chat_redis_up`
 - `linearvoid_chat_request_duration_seconds_bucket/_count/_sum` (histogram)
 - Plus `ALERTS`, `ALERTS_FOR_STATE` (alert state series).
 ## Playout Target (`linearvoid_playout_*`)
 - `linearvoid_playout_mode`
 - `linearvoid_playout_restarts_total`
 - Plus `ALERTS`, `ALERTS_FOR_STATE`.
 ## Nginx Target (`nginx_*`)
 Nginx (Go-based nginx exporter) metrics. Key operational series:
 - `nginx_connections_accepted`, `nginx_connections_active`, `nginx_connections_handled`
 - `nginx_connections_reading`, `nginx_connections_waiting`, `nginx_connections_writing`
 - `nginx_http_requests_total`
 - `nginx_exporter_build_info`, `nginx_up`
 - Standard Go/process/promhttp/scrape boilerplate.
 ## Node Target (node_exporter, ZFS host)
 Exposes the full standard node_exporter metric set plus ZFS (`node_zfs_*`) and
 hwmon (`node_hwmon_*`) collectors. Operationally meaningful series include:
 - **CPU/load:** `node_load1/5/15`, `node_cpu_seconds_total`, `node_cpu_scaling_frequency_hertz`,
  `node_procs_running`, `node_procs_blocked`, `node_context_switches_total`
 - **Memory:** `node_memory_MemTotal_bytes`, `node_memory_MemAvailable_bytes`,
  `node_memory_MemFree_bytes`, `node_memory_SwapTotal_bytes`, `node_memory_SwapFree_bytes`,
  `node_vmstat_oom_kill`
 - **Filesystem/disk:** `node_filesystem_avail_bytes`, `node_filesystem_free_bytes`,
  `node_filesystem_size_bytes`, `node_filesystem_readonly`, `node_disk_read_bytes_total`,
  `node_disk_written_bytes_total`, `node_disk_io_time_seconds_total`
 - **Network:** `node_network_receive_bytes_total`, `node_network_transmit_bytes_total`,
  `node_network_up`, plus full `node_netstat_*` TCP/UDP/ICMP series
 - **Files/fds:** `node_filefd_allocated`, `node_filefd_maximum`
 - **Time:** `node_time_seconds`, `node_time_zone_offset_seconds`, `node_timex_sync_status`
 - **ZFS ARC/L2ARC:** extensive `node_zfs_arc_*`/`node_zfs_l2_*` hit/miss/size series,
  `node_zfs_zil_*`, `node_zfs_dbuf_*`, `node_zfs_dnode_*`, `node_zfs_zfetch_*`
 - **Thermals:** `node_hwmon_temp_celsius`, `node_hwmon_temp_crit_celsius`
 - `node_exporter_build_info`, `node_uname_info`, `node_os_info`, `node_boot_time_seconds`.
 ## Postgres Target (`pg_*` / postgres_exporter)
 Go-based postgres exporter. Key operational series:
 - **Health/replication:** `pg_up`, `pg_database_size_bytes`, `pg_database_connection_limit`,
  `pg_replication_is_replica`, `pg_replication_lag_seconds`, `pg_replication_last_replay_seconds`,
  `pg_locks_count`, `pg_wal_segments`, `pg_wal_size_bytes`
 - **Settings (config-as-metric):** `pg_settings_*` (autovacuum, bgwriter, checkpoints,
  max_connections, shared_buffers, work_mem, wal_*, etc.)
 - **Activity/statistics:** `pg_stat_activity_count`, `pg_stat_activity_max_tx_duration`,
  `pg_stat_bgwriter_*` (checkpoints, buffers, fsync), `pg_stat_database_*` (commits,
  rollbacks, deadlocks, temp files, cache hit/read, tuple ops), `pg_stat_archiver_*`
 - **Tables:** `pg_stat_user_tables_*` (live/dead tuples, seq/index scans, vacuum/analyze
  counts), `pg_statio_user_tables_*` (heap/index block hits & reads, incl. TOAST)
 - `pg_exporter_*` scrape health series, `postgres_exporter_build_info`, and Go/process boilerplate.
 ## Prometheus Target (self-scrape)
 Prometheus' own metrics. Operationally meaningful series include:
 - **Health/status:** `prometheus_build_info`, `prometheus_ready`,
  `prometheus_config_last_reload_successful` (+ timestamp), `prometheus_tsdb_clean_start`
 - **TSDB:** `prometheus_tsdb_head_series`, `prometheus_tsdb_head_samples_appended_total`,
  `prometheus_tsdb_blocks_loaded`, `prometheus_tsdb_retention_limit_seconds`,
  `prometheus_tsdb_storage_blocks_bytes`, `prometheus_tsdb_wal_storage_size_bytes`,
  `prometheus_tsdb_lowest_timestamp`/`_seconds`, `prometheus_tsdb_head_max_time`
 - **Scraping:** `prometheus_sd_discovered_targets`, `prometheus_sd_failed_configs`,
  `prometheus_sd_last_update_timestamp_seconds`, `prometheus_target_scrape_pool_targets`,
  `prometheus_target_scrape_pool_target_limit`, `prometheus_target_interval_length_seconds`
 - **Rules/alerting:** `prometheus_rule_group_*` (evaluation duration/failures/interval/
  rules), `prometheus_rule_evaluation_failures_total`, `prometheus_evaluations_total`,
  `prometheus_notifications_alertmanagers_discovered`, `prometheus_notifications_queue_capacity`
 - **Engine/HTTP:** `prometheus_engine_queries`, `prometheus_http_requests_total`,
  `prometheus_http_request_duration_seconds_*`, `prometheus_remote_storage_*` (if remote write enabled)
 - Standard Go/process/promhttp/scrape boilerplate.
 ## Redis Target (redis_exporter)
 Go-based redis exporter. Key operational series:
 - **Health:** `redis_up`, `redis_instance_info`, `redis_uptime_in_seconds`,
  `redis_start_time_seconds`, `redis_exporter_last_scrape_error`
 - **Memory:** `redis_memory_used_bytes`, `redis_memory_used_peak_bytes`,
  `redis_memory_max_bytes`, `redis_memory_used_rss_bytes`, `redis_mem_fragmentation_ratio`,
  `redis_mem_fragmentation_bytes`
 - **Clients/connections:** `redis_connected_clients`, `redis_max_clients`,
  `redis_connections_received_total`, `redis_rejected_connections_total`,
  `redis_blocked_clients`
 - **Commands/latency:** `redis_commands_processed_total`, `redis_commands_failed_calls_total`,
  `redis_commands_duration_seconds_total`, `redis_commands_latencies_usec_*`,
  `redis_latency_percentiles_usec`, `redis_errors_total`
 - **Keys/eviction/expiry:** `redis_db_keys`, `redis_db_keys_expiring`, `redis_db_avg_ttl_seconds`,
  `redis_keyspace_hits_total`, `redis_keyspace_misses_total`, `redis_evicted_keys_total`,
  `redis_expired_keys_total`
 - **Persistence:** `redis_rdb_last_bgsave_status`, `redis_rdb_last_bgsave_duration_sec`,
  `redis_aof_enabled`, `redis_aof_last_write_status`, `redis_aof_current_size_bytes`
 - **Replication/pubsub:** `redis_connected_slaves`, `redis_master_repl_offset`,
  `redis_replication_backlog_bytes`, `redis_pubsub_channels`, `redis_pubsub_clients`
 - **Config:** `redis_config_maxmemory`, `redis_config_maxclients`
 - Standard process/promhttp/scrape boilerplate.
 ## Notes
 - The only alert-related series present are Prometheus' standard `ALERTS` and
  `ALERTS_FOR_STATE` on the Chat and Playout targets; no concrete rule thresholds
  are recorded in this file.
 - No dashboard definitions, alert thresholds, curl outputs, or numeric sample
  values are captured here — this document is purely the exposed-metric inventory
  per target.
@@ -0,0 +1,140 @@
 # Cloudflare and UptimeRobot Manual Completion Checklist
 Purpose: execute and record all manual dashboard tasks that cannot be automated from repository workflows.
 Recommended execution order:
 1. Bind `media.linearvoid.tv` and confirm the HLS origin is separate from the app origin.
 2. Enable Workers, Tiered Cache, and cache behavior for the media zone.
 3. Apply WAF, bot, rate limiting, HTTPS, and HSTS settings.
 4. Verify monitor targets and alert delivery in UptimeRobot.
 5. Capture evidence and fill in the sign-off block.
 ## Status Legend
 - [ ] Pending
 - [x] Done
 ## 1) Cloudflare Workers Deploy and Custom Domain
 - [ ] Create a Cloudflare Worker for the SPA and bind the build output
 - [ ] Build command set to: `cd frontend && npm run build`
 - [ ] Output directory set to: `frontend/dist`
 - [ ] Production domain attached to `linearvoid.tv`
 Evidence to capture:
 - Screenshot of Worker deployment settings
 - Deployment URL and latest deployment timestamp
 - Confirmed production build output path in the Worker
 ## 2) Tiered Cache Enablement and Validation
 - [ ] Smart Tiered Cache enabled for zone
 - [ ] Warm request made to hot HLS segment
 - [ ] Warm request made to live manifest
 - [ ] `Cf-Cache-Status: HIT` observed on repeated requests
 Validation commands:
 ```bash
 curl -I https://media.linearvoid.tv/hls/playlist.m3u8
 curl -I https://media.linearvoid.tv/hls/<segment>.m4s
 ```
 Evidence to capture:
 - Headers from first request (expected MISS)
 - Headers from repeated request (expected HIT)
 - Screenshot or export showing Smart Tiered Cache enabled
 ## 3) WAF and Bot Protection
 - [ ] OWASP Managed Ruleset enabled
 - [ ] Mode set to Simulate
 - [ ] Simulate mode reviewed for 48h
 - [ ] Mode switched to Block after false-positive review
 - [ ] Bot Fight Mode enabled
 Evidence to capture:
 - WAF ruleset status screenshot
 - Count of blocked/challenged events after cutover
 - Note on any false positives and the final allow/exception rules applied
 ## 4) Rate Limiting Rules
 - [ ] Rule created for `/api/admin/login`
 - [ ] Rule created for `/api/admin/*`
 - [ ] Threshold set to `10 requests / 10 seconds / IP`
 - [ ] Action set to Managed Challenge
 - [ ] Rule order validated
 Validation approach:
 - Use burst requests from a test client and verify challenge behavior without blocking legitimate admin flow.
 Evidence to capture:
 - Rule definitions screenshot
 - Test result notes (challenge seen / no lockout)
 - Keep a copy of the test source IP and timestamps used during validation
 ## 5) HTTPS and WSS Hardening
 - [ ] Always Use HTTPS enabled
 - [ ] HSTS enabled with max-age 31536000
 - [ ] HSTS includeSubDomains enabled
 - [ ] HSTS preload enabled
 - [ ] Minimum TLS version set to 1.2+
 - [ ] SSL mode verified as Full (strict)
 - [ ] WSS endpoint validated through proxy (`wss://linearvoid.tv/ws`)
 Validation commands:
 ```bash
 curl -I https://linearvoid.tv
 curl -I https://linearvoid.tv/health
 ```
 Evidence to capture:
 - Response headers showing HSTS
 - Successful browser WebSocket connect in devtools
 - TLS mode screenshot from Cloudflare showing Full (strict)
 ## 6) UptimeRobot Monitors
 - [ ] HTTP monitor added for `https://linearvoid.tv/health` (5m)
 - [ ] Keyword monitor added for `https://linearvoid.tv/hls/playlist.m3u8` (keyword `#EXTM3U`, 5m)
 - [ ] Alert trigger set to 2 consecutive failures
 - [ ] Notification channels configured (email + Discord/Slack webhook)
 Evidence to capture:
 - Monitor dashboard screenshot
 - Test alert delivery confirmation
 - List of recipients/webhook destinations verified during the alert test
 ## 7) Sign-Off
 - [ ] Cloudflare manual tasks complete
 - [ ] UptimeRobot tasks complete
 - [ ] TODO items updated to done
 - [ ] Changelog entry added for completion batch
 Completion summary:
 - Worker build URL:
 - Cache validation result:
 - WAF/rate-limit status:
 - HTTPS/HSTS status:
 - UptimeRobot monitor status:
 - Evidence folder or note link:
 Sign-off fields:
 - Owner:
 - Date:
 - Environment (test-lab or production):
 - Notes:
@@ -0,0 +1,71 @@
 # Cloudflare Workers Setup — Linear Void
 Linear Void uses Cloudflare Workers for two purposes:
 | Product     | Purpose            | What                                                                                         |
 | ----------- | ------------------ | -------------------------------------------------------------------------------------------- |
 | **Workers** | Static SPA hosting | `linearvoid-frontend` (`frontend/wrangler.toml`) — Vite SPA (`frontend/dist`) static assets  |
 | **Workers** | Edge HLS delivery  | `linearvoid-media` (`infrastructure/cloudflare/`) — R2-bound Worker on `media.linearvoid.tv` |
 Both are managed under **Workers & Pages** in the Cloudflare dashboard.
 ## Dashboard URLs
 | Resource                 | URL                                                                                                                       |
 | ------------------------ | ------------------------------------------------------------------------------------------------------------------------- |
 | Workers & Pages overview | `https://dash.cloudflare.com/deb11491c54ec53a24772e98ac6d8128/workers-and-pages`                                          |
 | Worker: linearvoid-media | `https://dash.cloudflare.com/deb11491c54ec53a24772e98ac6d8128/workers/services/view/linearvoid-media/production/settings` |
 | API tokens               | <https://dash.cloudflare.com/profile/api-tokens>                                                                          |
 ## Worker: `linearvoid-media` (edge HLS delivery)
 The Worker in [`infrastructure/cloudflare/`](../../infrastructure/cloudflare/) runs on the `linearvoid-media` Workers service. It owns the `media.linearvoid.tv` host, serves HLS objects from the R2 bucket (bound as `MEDIA_BUCKET`), and stamps immutable `Cache-Control` on segments plus a short TTL on live manifests (CORS + Range supported). See its [README](../../infrastructure/cloudflare/README.md).
 **Run-scoped layout.** R2 objects are stored run-scoped (`hls/r-{runID}/seg-*.m4s`, `…/init.mp4`), and the live `hls/playlist.m3u8` references them with the run prefix (the playout rewrites bare URIs before publishing — see [`docs/STREAMING.md`](../STREAMING.md)). The Worker is a faithful path→R2 mapper: it serves whatever key the request path resolves to (e.g. `/hls/r-…/seg-*.m4s`), adds the cache headers by file type, and does not rewrite manifest URIs at serve time.
 Test / deploy:
 ```bash
 cd infrastructure/cloudflare
 npm install && npm test              # unit + Miniflare R2 tests
 npx wrangler deploy                  # preview/test target
 npx wrangler deploy --env production # attach media.linearvoid.tv
 ```
 Attach the production custom domain only after removing `media.linearvoid.tv` from the R2 bucket's direct custom-domain binding. Automated production deploy: [`.gitea/workflows/workers-media-deploy.yml`](../../.gitea/workflows/workers-media-deploy.yml).
 ## Worker: static frontend
 Serve the Vite-built SPA (`frontend/dist`) as Worker static assets:
 1. Build the frontend: `cd frontend && npm run build`.
 2. Bind `frontend/dist` to the Worker as static assets (Workers Static Assets / `assets` in `wrangler.toml`).
 3. Attach the `linearvoid.tv` custom domain to the Worker.
 See [gitea-cloudflare-workers.md](./gitea-cloudflare-workers.md) for the automated deployment workflow.
 ### Build-time variables
 The `VITE_PUBLIC_*` values are baked into the bundle at build time by Vite (`vite.config.ts` uses `envDir: ".."` to read them from the repo root). They are supplied by the Gitea Actions build environment from Gitea secrets — not as Worker runtime variables. The static-assets Worker has no runtime JavaScript, so it reads no `env` at request time.
 | Name                                     | Value                                           |
 | ---------------------------------------- | ----------------------------------------------- |
 | `VITE_PUBLIC_APP_URL`                    | `https://linearvoid.tv`                         |
 | `VITE_PUBLIC_WS_URL`                     | `wss://linearvoid.tv/ws`                        |
 | `VITE_PUBLIC_HLS_URL`                    | `https://media.linearvoid.tv/hls/playlist.m3u8` |
 | `VITE_PUBLIC_ADMIN_DEFAULT_MODERATOR`    | `boogers`                                       |
 | `VITE_PUBLIC_ADMIN_DEFAULT_ROOM`         | `main`                                          |
 | `VITE_PUBLIC_ADMIN_MODERATION_LOG_LIMIT` | `50`                                            |
 Backend services (playout, chat, nginx) read their own runtime variables (`ADMIN_*`, `HLS_*`, `PLAYLIST_PATH`, `R2_*`, `DATABASE_URL`, `REDIS_URL`) from the container environment — see [`.env.example`](../../.env.example).
 ## Custom domains
 - `linearvoid.tv` → Worker (static SPA, `linearvoid-frontend`)
 - `www.linearvoid.tv` → redirect to `linearvoid.tv`
 - `media.linearvoid.tv` → Worker (`linearvoid-media`, R2-bound) serving the `linearvoid-media` bucket
 ## Related
 - [Gitea to Cloudflare Workers deployment guide](./gitea-cloudflare-workers.md)
 - [Cloudflare & UptimeRobot checklist](./cloudflare-uptimerobot-checklist.md)
@@ -0,0 +1,107 @@
 # Gitea to Cloudflare Workers — Linear Void
 ## Goal
 Deploy the Linear Void frontend (Vite + TypeScript SPA) from Gitea to Cloudflare Workers using Gitea Actions and Wrangler.
 ## Prerequisites
 1. **Cloudflare Worker** for the SPA:
   - Dashboard → Workers & Pages → Create → Worker (or Workers Static Assets).
   - Name it `linearvoid-frontend` (the edge-cache Worker already uses the `linearvoid` name).
 2. **API token** with Workers permissions:
   - Create at <https://dash.cloudflare.com/profile/api-tokens>
   - Permission: `Account → Workers Scripts → Edit` and `Account → Workers Routes → Edit`
   - Store in Gitea → Settings → Secrets as `CLOUDFLARE_API_TOKEN`
 3. **Account ID** from Cloudflare dashboard overview → store as `CLOUDFLARE_ACCOUNT_ID`
 4. **Wrangler config** (`frontend/wrangler.toml`) binding the `frontend/dist` output as static assets.
 > **Naming:** Workers share a namespace under "Workers & Pages". The media edge Worker is `linearvoid-media` ([`infrastructure/cloudflare/`](../../infrastructure/cloudflare/wrangler.toml), deployed via `.gitea/workflows/workers-media-deploy.yml`) and the SPA Worker is `linearvoid-frontend` (`frontend/wrangler.toml`, deployed via `.gitea/workflows/workers-deploy.yml`).
 ## Project-specific values
 | Setting            | Value                                                      |
 | ------------------ | ---------------------------------------------------------- |
 | Framework          | Vite + TypeScript                                          |
 | Build command      | `cd frontend && npm install && npm run build`              |
 | Output directory   | `frontend/dist`                                            |
 | Node version       | 22                                                         |
 | Multi-page entries | `index.html`, `admin/index.html`, `admin/login/index.html` |
 ## Gitea Actions workflow
 Build the SPA and deploy with Wrangler:
 ```yaml
 name: Deploy to Cloudflare Workers
 on:
  workflow_run:
    workflows: [CI]
    types: [completed]
  workflow_dispatch: {}
 jobs:
  deploy:
    if: ${{ github.event_name == 'workflow_dispatch' || github.event.workflow_run.conclusion == 'success' }}
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Setup Node
        uses: actions/setup-node@v4
        with:
          node-version: 22
      - name: Install dependencies
        run: cd frontend && npm ci
      - name: Build
        env:
          VITE_PUBLIC_APP_URL: ${{ secrets.VITE_PUBLIC_APP_URL }}
          VITE_PUBLIC_WS_URL: ${{ secrets.VITE_PUBLIC_WS_URL }}
          VITE_PUBLIC_HLS_URL: ${{ secrets.VITE_PUBLIC_HLS_URL }}
          VITE_PUBLIC_ADMIN_DEFAULT_MODERATOR: ${{ secrets.VITE_PUBLIC_ADMIN_DEFAULT_MODERATOR }}
          VITE_PUBLIC_ADMIN_DEFAULT_ROOM: ${{ secrets.VITE_PUBLIC_ADMIN_DEFAULT_ROOM }}
          VITE_PUBLIC_ADMIN_MODERATION_LOG_LIMIT: "50"
        run: cd frontend && npm run build
      - name: Deploy to Cloudflare Workers
        env:
          CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }}
          CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
        run: |
          cd frontend
          npx wrangler deploy
 ```
 ## Secrets to add in Gitea
 | Secret                                | Value                                |
 | ------------------------------------- | ------------------------------------ |
 | `CLOUDFLARE_API_TOKEN`                | API token with Workers permissions   |
 | `CLOUDFLARE_ACCOUNT_ID`               | Cloudflare account ID from dashboard |
 | `VITE_PUBLIC_APP_URL`                 | Public viewer URL                    |
 | `VITE_PUBLIC_WS_URL`                  | WebSocket endpoint                   |
 | `VITE_PUBLIC_HLS_URL`                 | HLS playlist URL                     |
 | `VITE_PUBLIC_ADMIN_DEFAULT_MODERATOR` | Default moderator username           |
 | `VITE_PUBLIC_ADMIN_DEFAULT_ROOM`      | Default chat room                    |
 ## Verify deployment
 1. Push to `main` or trigger manually from Gitea Actions.
 2. Check **Gitea Actions** → job logs for the deploy step.
 3. Check **Cloudflare Workers** → `linearvoid-frontend` → Deployments for the new version.
 4. Visit `https://linearvoid-frontend.zwitschi82.workers.dev`, then attach `linearvoid.tv` when ready.
 ## Notes
 - The existing `ci.yml` already builds the frontend; the Workers deploy workflow is additive and independent.
 - Multi-page SPA (`vite.config.ts`) produces three entry points — Workers static assets serve them correctly.
 - For SPA fallback routing, set Workers static assets `not_found_handling` to `single-page-application` (serve `index.html` for unknown paths).
 - The deploy workflow lives in `.gitea/workflows/workers-deploy.yml` (triggered after CI succeeds).
 ## Related resources
 - Cloudflare Workers dashboard: `https://dash.cloudflare.com/deb11491c54ec53a24772e98ac6d8128/workers/services/view/linearvoid/production/settings` — for managing the `infrastructure/cloudflare/worker.js` deployment and the SPA Worker
@@ -0,0 +1,225 @@
 # Scaling and Performance Playbook
 Purpose: define a repeatable method to measure performance, capture baselines, and decide scaling actions for the "Linear Void" streaming app. Scope: planning/execution for the "Scaling & Performance (planning only)" TODO items.
 ## 1) Manifest TTL Tuning Plan
 Goal: tune the `.m3u8` TTL to ~`0.5x` segment duration while keeping playback stable.
 Inputs: segment duration (`HLS_SEGMENT_DURATION`), current manifest TTL (Cloudflare cache rule), cache outcome distribution (`Cf-Cache-Status`).
 Procedure:
 1. Start from current manifest TTL (2s).
 2. Capture 24h baseline headers from repeated `playlist.m3u8` requests.
 3. Test candidate TTLs: 1s, 2s, 3s.
 4. Compare rebuffer events (player logs), origin request increase/decrease, and HIT ratio changes.
 5. Select the lowest TTL that keeps playback stable and origin load acceptable.
 Acceptance: no material increase in rebuffer rate; manifest staleness not observable by users.
 ## 2) TTFB Baseline Plan
 Goal: measure warm-cache TTFB from 3+ US regions with target `< 4s`.
 Regions: US East (Virginia), US Central, US West (California/Oregon).
 Method:
 1. Use WebPageTest with repeat view enabled.
 2. Run at least 5 samples per region.
 3. Record median and p95 TTFB.
 4. Store results in a table (date, region, median, p95, test URL).
 Acceptance: warm-cache median < 4s in all regions; outliers documented with likely cause.
 ### TTFB Baseline Worksheet
 Use one row per region; keep the raw WebPageTest result URL with the summary for comparison.
 - US East (Virginia) / US Central / US West (California/Oregon): Date/time, Test URL `https://linearvoid.tv`, WebPageTest result URL, Median TTFB, p95 TTFB, Notes.
 Capture notes: use repeat view for warm-cache; keep the same browser profile and test URL across regions; note any CDN cache-rule changes or deploys between samples.
 ## 3) WebSocket Load-Test Plan
 Goal: characterize chat behavior across 10 → 100 → 500 → 1000 concurrent clients.
 Tooling option A (Artillery):
 ```bash
 npx artillery run scripts/loadtest/ws-chat.yml
 ```
 Tooling option B (custom Go harness): open N concurrent WS clients, send a message every X seconds, measure round-trip latency and failures.
 Metrics: p50/p95 message latency; error rate (connect/send/receive); dropped connections; CPU/memory for `chat`, `redis`, `nginx`.
 Acceptance: p95 chat latency ≤ 1s at target concurrency tier; error rate ≤ 1% during steady state.
 ### WebSocket Load-Test Worksheet
 Date/time, Environment, Commit SHA/image tag, Test URL, Tool used, Scenario duration, Concurrency tiers reached, p50 message latency, p95 message latency, Error rate, Dropped connections, CPU/memory notes for chat/redis/nginx, Raw results location, Conclusion, Next action.
 ## 4) Admin API Benchmark Plan
 Goal: measure admin API p95 and identify slow endpoints.
 Endpoints: `/api/admin/overview`, `/api/admin/analytics`, `/api/admin/chat-log`, `/api/admin/users`.
 Tooling option A (`k6`):
 ```bash
 k6 run scripts/loadtest/admin-api.js
 ```
 Tooling option B (`wrk`):
 ```bash
 wrk -t4 -c100 -d60s http://<host>/api/admin/overview
 ```
 Acceptance: p95 < 1s for primary admin endpoints; slow endpoint list with remediation notes.
 ### Admin API Benchmark Worksheet
 Date/time, Environment, Commit SHA/image tag, Test URL, Tool used, Scenario duration, Concurrency/virtual users, `/api/admin/overview|analytics|chat-log|users` p95, Error rate, Slowest endpoint, Cache or DB notes, Raw results location, Conclusion, Next action.
 ## 5) Cache Hit Ratio Tracking Plan
 Goal: track Cloudflare cache hit ratio and alert when below threshold.
 Implementation:
 1. Pull Cloudflare GraphQL analytics on schedule.
 2. Export to a Prometheus-compatible metric path.
 3. Add a Grafana panel with 5m/1h/24h windows.
 4. Alert when hit ratio < 90% for 15m.
 Reference exporter:
 - `scripts/cache-hit-ratio.js`
 - `scripts/cache-hit-ratio.sh` for scheduled tasks / manual runs
 - Example run: `export CLOUDFLARE_API_TOKEN=... CLOUDFLARE_ZONE_TAG=... CLOUDFLARE_HOSTNAME=media.linearvoid.tv; node scripts/cache-hit-ratio.js`
 - Intended output: Prometheus text format on stdout, suitable for cron, a Node wrapper, or a small scrape endpoint.
 Metric target: `cache_hit_ratio >= 0.90`.
 ### Cache Hit Ratio Worksheet
 Date/time, Environment, Commit SHA/image tag, Hostname, Window minutes, Cloudflare zone tag, Export command, Raw exporter output location, Hit requests, Total requests, Cache hit ratio, Threshold met, Notes.
 ## 6) Capacity Trigger Rules
 Operational triggers:
 - Cache miss ratio > 10% for 15m
 - Chat p95 latency > 1s for 5m
 - Host CPU > 80% for 10m
 - Redis memory usage ratio (`linearvoid_chat_redis_memory_usage_ratio`) > 0.85 for 10m
 Action mapping:
 - Level 1: investigate + restart non-critical components
 - Level 2: scale service resources (CPU/RAM)
 - Level 3: activate standby planning path
 ### Capacity Trigger Review
 Date/time, Environment, Commit SHA/image tag, Trigger hit, Threshold value, Observed value, Duration above threshold, Level selected, Immediate action taken, Services involved, Follow-up owner, Raw metrics/alert link, Notes.
 ## 7) Phase 2 Service Separation Plan
 Objective: separate bottlenecked services while keeping ops simple.
 Boundaries:
 - `playout` isolated first (CPU-heavy)
 - `chat` + `redis` grouped for latency
 - `db` isolated for IO stability
 - monitoring stack optionally separated after sustained load
 Initial sizing:
 - playout host: 4 vCPU / 8 GB
 - chat host: 2–4 vCPU / 4–8 GB
 - db host: 2 vCPU / 4 GB + fast disk
 Exit criteria: repeated trigger events over 7 days; capacity saturation despite tuning.
 ### Phase 2 Boundary Worksheet
 Date/time, Environment, Commit SHA/image tag, Trigger history summary, Repeated trigger count over 7 days, Primary bottleneck, Proposed split, `playout`/`chat`/`db` target host size, Monitoring separation needed, Data/state migration notes, Implementation owner, Review decision, Next action.
 ## 8) Phase 3 Warm Standby Plan
 Objective: second-region resilience with DNS failover.
 Layout:
 - Primary: Hetzner Ashburn (US-East)
 - Standby: Hetzner Hillsboro (US-West)
 Design: warm standby stack deployed and health-checked; Redis replication or fallback mode documented; Postgres replication strategy selected (streaming replica or periodic snapshot restore); Cloudflare DNS failover policy defined (health-based or manual emergency switch).
 ### Phase 3 Warm Standby Worksheet
 Date/time, Environment, Commit SHA/image tag, Primary region, Standby region, DNS failover mode, Redis strategy, Postgres strategy, Health check endpoints, Simulated cutover performed, Measured RTO, Measured RPO, Open risks, Implementation owner, Review decision, Notes.
 ## 9) Data Capture Template
 For each benchmark run capture: Date/time, Environment (test-lab/staging/production), Commit SHA/image tag, Test scenario and duration, Raw metrics (latency, errors, resource usage), Conclusion and next action.
 ## 10) Execution Order
 1. TTFB baseline
 2. WebSocket load profile
 3. Admin API benchmark
 4. Cache ratio panel + alerting
 5. Trigger tuning
 6. Phase 2 boundary decision
 7. Phase 3 standby design review
 ## 11) Benchmark Run Sheet
 Use the same worksheet for every baseline/re-test so results stay comparable.
 Preconditions: confirm target environment and commit SHA/image tag; confirm Cloudflare cache rules are active when testing TTFB or manifest TTL; confirm chat, admin, and playout services are healthy before load testing.
 Run template:
 | Item                       | Value |
 | -------------------------- | ----- |
 | Date/time                  |       |
 | Environment                |       |
 | Commit SHA / image tag     |       |
 | Test scenario              |       |
 | Concurrency / sample count |       |
 | Command or tool            |       |
 | Raw results location       |       |
 | Conclusion                 |       |
 | Next action                |       |
 Suggested command mapping:
 - TTFB baseline: WebPageTest repeat-view run against `https://linearvoid.tv`.
 - WebSocket profile: `npx artillery run scripts/loadtest/ws-chat.yml` or the Go harness referenced above.
 - Admin API benchmark: `k6 run scripts/loadtest/admin-api.js` or `wrk -t4 -c100 -d60s http://<host>/api/admin/overview`.
 ## 12) Scaling Decision Gate
 Default review gate after any benchmark batch:
 1. If warm-cache TTFB meets target but cache hit ratio falls below 90%, tune cache behavior before increasing capacity.
 2. If chat or admin latency exceeds target while CPU and memory remain low, prioritize query or handler optimization.
 3. If CPU, memory, or Redis saturation appears first, treat the Phase 2 service boundary guidance as the next action.
 4. If the same threshold trips on multiple runs across 7 days, open the Phase 2 or Phase 3 planning path instead of tuning in place.
 Decision note: keep the smallest change that restores the target metric and record the reason in the run sheet.
 ## 13) Artifact-to-Worksheet Field Mapping
 Use when filling the WebSocket and Admin API worksheets from helper-generated artifacts.
 ### WebSocket worksheet mapping
 Artifact sources: `artifacts/<timestamp>/ws-chat-report.json`, `artifacts/<timestamp>/ws-chat-summary.txt`.
 Field mapping:
 - `Tool used` → `artillery` (or `scripts/loadtest/run-loadtests.sh -s ws`)
 - `Raw results location` → artifact folder path for this run
 - `Concurrency tiers reached` → `ws-chat.yml` phases (`warmup-10`, `sustain-100`, `sustain-500`, `sustain-1000`)
 - `Error rate` → `vusers.failure_rate_percent` from `ws-chat-summary.txt`
 - `Dropped connections` → derive from `vusers.created - vusers.completed` (use `vusers.failed` as failure signal)
 - `p95 message latency` → first latency line under `summary.*` in `ws-chat-summary.txt` containing `p95=...`
 - `p50 message latency` → first latency line under `summary.*` in `ws-chat-summary.txt` containing `median=...`
 Notes: the exact `summary.*` metric names in Artillery output can vary by engine/plugins; if no latency summary field is emitted, record this explicitly and use server-side latency metrics as fallback evidence.
 ### Admin API worksheet mapping
 Artifact sources: `artifacts/<timestamp>/admin-api-summary.json`, `artifacts/<timestamp>/admin-api-output.txt`, `artifacts/<timestamp>/admin-api-endpoint-summary.txt`.
 Field mapping:
 - `Tool used` → `k6` (or `scripts/loadtest/run-loadtests.sh -s admin`)
 - `Raw results location` → artifact folder path for this run
 - `/api/admin/overview|analytics|chat-log|users` p95 → `overview|analytics|chat_log|users` row `P95Ms` in `admin-api-endpoint-summary.txt`
 - `Error rate` → `Global failure rate` in `admin-api-endpoint-summary.txt`
 - `Slowest endpoint` → endpoint row with highest `P95Ms`
 Notes: keep the raw `admin-api-summary.json` file for audits and re-parsing; if an endpoint row is missing, treat it as a test/data issue and re-run with full endpoint coverage.
 Summary helper (bash): run `scripts/loadtest/summarize-artillery.sh <report.json>` after an Artillery WS run, and `scripts/loadtest/summarize-k6.sh <summary.json>` after a k6 admin run, to produce the artifact files used in the mappings above.
@@ -5,6 +5,9 @@
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Linear Void Admin</title>
  <link rel="preconnect" href="https://fonts.googleapis.com">
  <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
  <link href="https://fonts.googleapis.com/css2?family=Doto:wght@100..900&family=IBM+Plex+Mono:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;1,100;1,200;1,300;1,400;1,500;1,600;1,700&family=Space+Grotesk:wght@300..700&family=Tektur:wght@400..900&display=swap" rel="stylesheet">
  <link rel="stylesheet" href="../src/style.css" />
 </head>
@@ -19,15 +22,33 @@
      <button id="logout-btn" type="button" class="btn btn-secondary btn-block">Sign out</button>
      <nav class="admin-nav" aria-label="Admin sections" role="tablist" aria-orientation="vertical">
-                <button type="button" id="tab-trigger-dashboard" role="tab" class="tab-trigger is-active" data-tab="dashboard" aria-controls="tab-dashboard" aria-selected="true">Dashboard</button>
+        <button type="button" id="tab-trigger-dashboard" role="tab" class="tab-trigger is-active" data-tab="dashboard" aria-controls="tab-dashboard" aria-selected="true">
-                <button type="button" id="tab-trigger-upload" role="tab" class="tab-trigger" data-tab="upload" aria-controls="tab-upload" aria-selected="false">Upload Video</button>
+          Dashboard
-                <button type="button" id="tab-trigger-playlist" role="tab" class="tab-trigger" data-tab="playlist" aria-controls="tab-playlist" aria-selected="false">Playlist</button>
+        </button>
-                <button type="button" id="tab-trigger-schedule" role="tab" class="tab-trigger" data-tab="schedule" aria-controls="tab-schedule" aria-selected="false">Schedule</button>
+        <button type="button" id="tab-trigger-upload" role="tab" class="tab-trigger" data-tab="upload" aria-controls="tab-upload" aria-selected="false">
-                <button type="button" id="tab-trigger-moderation" role="tab" class="tab-trigger" data-tab="moderation" aria-controls="tab-moderation" aria-selected="false">Moderation</button>
+          Upload Video
-                <button type="button" id="tab-trigger-chat-log" role="tab" class="tab-trigger" data-tab="chat-log" aria-controls="tab-chat-log" aria-selected="false">Chat Log</button>
+        </button>
-                <button type="button" id="tab-trigger-users" role="tab" class="tab-trigger" data-tab="users" aria-controls="tab-users" aria-selected="false">Users</button>
+        <button type="button" id="tab-trigger-playlist" role="tab" class="tab-trigger" data-tab="playlist" aria-controls="tab-playlist" aria-selected="false">
-                <button type="button" id="tab-trigger-analytics" role="tab" class="tab-trigger" data-tab="analytics" aria-controls="tab-analytics" aria-selected="false">Analytics</button>
+          Playlist
-                <button type="button" id="tab-trigger-system" role="tab" class="tab-trigger" data-tab="system" aria-controls="tab-system" aria-selected="false">System</button>
+        </button>
        <button type="button" id="tab-trigger-schedule" role="tab" class="tab-trigger" data-tab="schedule" aria-controls="tab-schedule" aria-selected="false">
          Schedule
        </button>
        <button type="button" id="tab-trigger-moderation" role="tab" class="tab-trigger" data-tab="moderation" aria-controls="tab-moderation" aria-selected="false">
          Moderation
        </button>
        <button type="button" id="tab-trigger-chat-log" role="tab" class="tab-trigger" data-tab="chat-log" aria-controls="tab-chat-log" aria-selected="false">
          Chat Log
        </button>
        <button type="button" id="tab-trigger-users" role="tab" class="tab-trigger" data-tab="users" aria-controls="tab-users" aria-selected="false">
          Users
        </button>
        <button type="button" id="tab-trigger-analytics" role="tab" class="tab-trigger" data-tab="analytics" aria-controls="tab-analytics" aria-selected="false">
          Analytics
        </button>
        <button type="button" id="tab-trigger-system" role="tab" class="tab-trigger" data-tab="system" aria-controls="tab-system" aria-selected="false">
          System
        </button>
      </nav>
    </aside>
@@ -5,6 +5,9 @@
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Linear Void Admin Login</title>
  <link rel="preconnect" href="https://fonts.googleapis.com">
  <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
  <link href="https://fonts.googleapis.com/css2?family=Doto:wght@100..900&family=IBM+Plex+Mono:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;1,100;1,200;1,300;1,400;1,500;1,600;1,700&family=Space+Grotesk:wght@300..700&family=Tektur:wght@400..900&display=swap" rel="stylesheet">
  <link rel="stylesheet" href="../../src/style.css" />
 </head>
@@ -29,34 +32,34 @@
  </main>
  <script>
-        const form = document.getElementById('login-form');
+    const form = document.getElementById("login-form");
-        const username = document.getElementById('username');
+    const username = document.getElementById("username");
-        const password = document.getElementById('password');
+    const password = document.getElementById("password");
-        const submit = document.getElementById('submit');
+    const submit = document.getElementById("submit");
-        const status = document.getElementById('status');
+    const status = document.getElementById("status");
-        form.addEventListener('submit', async (event) => {
+    form.addEventListener("submit", async (event) => {
      event.preventDefault();
      submit.disabled = true;
-            status.textContent = 'Signing in...';
+      status.textContent = "Signing in...";
-            status.className = 'status-line';
+      status.className = "status-line";
      try {
-                const response = await fetch('/api/admin/login', {
+        const response = await fetch("/api/admin/login", {
-                    method: 'POST',
+          method: "POST",
-                    headers: { 'Content-Type': 'application/json' },
+          headers: { "Content-Type": "application/json" },
-                    body: JSON.stringify({ username: username.value, password: password.value })
+          body: JSON.stringify({ username: username.value, password: password.value }),
        });
        if (!response.ok) {
          throw new Error(`HTTP ${response.status}`);
        }
-                window.location.href = '/admin/';
+        window.location.href = "/admin/";
      } catch (error) {
-                console.error('Failed to sign in', error);
+        console.error("Failed to sign in", error);
-                status.textContent = 'Login failed. Check your credentials.';
+        status.textContent = "Login failed. Check your credentials.";
-                status.className = 'status-line status-error';
+        status.className = "status-line status-error";
      } finally {
        submit.disabled = false;
      }
@@ -5,6 +5,9 @@
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Linear Void - 24/7 Synchronized Channel</title>
  <link rel="preconnect" href="https://fonts.googleapis.com">
  <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
  <link href="https://fonts.googleapis.com/css2?family=Doto:wght@100..900&family=IBM+Plex+Mono:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;1,100;1,200;1,300;1,400;1,500;1,600;1,700&family=Space+Grotesk:wght@300..700&family=Tektur:wght@400..900&display=swap" rel="stylesheet">
  <link rel="stylesheet" href="/src/style.css" />
 </head>
@@ -18,7 +21,9 @@
          <p class="viewer-subtitle">24/7 Synchronized Channel • Live</p>
        </div>
      </div>
-      <button id="chat-toggle" type="button" class="btn btn-secondary chat-toggle-btn" onclick="toggleChatPanel()" aria-controls="chat-panel" aria-expanded="true">Hide Chat</button>
+      <button id="chat-toggle" type="button" class="btn btn-secondary chat-toggle-btn" onclick="toggleChatPanel()" aria-controls="chat-panel" aria-expanded="true">
        Hide Chat
      </button>
    </header>
    <section class="viewer-content" aria-label="Live stream and chat layout">
@@ -36,29 +41,81 @@
            <span class="chat-live-marker" aria-hidden="true">●</span>
            <span id="room-name">Main Channel</span>
          </div>
          <div class="chat-header-actions">
            <span id="chat-user-label" class="chat-user-label" hidden></span>
            <button id="auth-toggle-btn" type="button" class="btn btn-secondary">Sign in</button>
            <button id="auth-logout-btn" type="button" class="btn btn-secondary" hidden>Sign out</button>
            <button type="button" class="btn btn-secondary" onclick="togglePrivateDM()">New DM</button>
          </div>
        </header>
-        <section id="messages" class="chat-messages" aria-live="polite" aria-label="Message stream"></section>
+        <div id="auth-panel" class="auth-modal" hidden>
          <div id="auth-backdrop" class="auth-modal-backdrop"></div>
          <div class="auth-modal-content">
            <button id="auth-close-btn" type="button" class="btn auth-close" aria-label="Close sign in">×</button>
            <h2 class="auth-modal-title">Sign in</h2>
            <input id="auth-username" type="text" class="input" placeholder="Username" autocomplete="username" />
            <input id="auth-password" type="password" class="input" placeholder="Password" autocomplete="current-password" />
            <div class="button-row">
              <button id="auth-login-btn" type="button" class="btn btn-primary">Log in</button>
              <button id="auth-register-btn" type="button" class="btn btn-secondary">Register</button>
            </div>
            <p id="auth-status" class="status-line" aria-live="polite"></p>
          </div>
        </div>
-        <section id="presence-panel" class="presence-panel" aria-label="Online users">
+        <div id="chat-flash" class="chat-flash" aria-live="polite" hidden></div>
        <section id="messages" class="chat-messages" aria-live="polite"></section>
        <section id="presence-panel" class="presence-panel">
          <div id="presence-list" class="presence-list"></div>
        </section>
        <div class="chat-input-area">
          <div class="chat-input-row">
            <label for="message-input" class="sr-only">Message input</label>
-            <input id="message-input" type="text" placeholder="Type a message..." class="input" onkeydown="if(event.key === 'Enter') sendMessage()" />
+            <input id="message-input" type="text" placeholder="Type a message..." class="input" onkeydown="if (event.key === 'Enter') sendMessage();" />
            <button type="button" class="btn btn-primary" onclick="sendMessage()">Send</button>
          </div>
-          <p class="chat-note">
+          <p class="chat-note">Synced with video • Moderation active</p>
            Synced with video • Moderation active
          </p>
        </div>
      </aside>
    </section>
  </main>
  <div id="reconnecting-overlay" class="reconnecting-overlay hidden" role="alert" aria-live="assertive">
    <div class="reconnecting-spinner"></div>
    <span id="reconnecting-text">Reconnecting...</span>
  </div>
  <script>
    (function () {
      // Load Matomo analytics when configured via the admin runtime config.
      fetch("/api/matomo")
        .then(function (r) {
          return r.ok ? r.json() : null;
        })
        .then(function (cfg) {
          if (!cfg || !cfg.matomoUrl || !cfg.matomoSiteId) return;
          var _paq = (window._paq = window._paq || []);
          _paq.push(["trackPageView"]);
          _paq.push(["enableLinkTracking"]);
          var base = String(cfg.matomoUrl).replace(/\/+$/, "");
          _paq.push(["setTrackerUrl", base + "/matomo.php"]);
          _paq.push(["setSiteId", String(cfg.matomoSiteId)]);
          var d = document;
          var g = d.createElement("script");
          var s = d.getElementsByTagName("script")[0];
          g.async = true;
          g.src = base + "/matomo.js";
          s.parentNode.insertBefore(g, s);
        })
        .catch(function () {
          /* analytics is optional */
        });
    })();
  </script>
  <script type="module" src="/src/main.ts"></script>
 </body>
@@ -1,17 +1,27 @@
 {
  "name": "frontend",
  "private": true,
-  "version": "1.0.9",
+  "version": "1.1.0",
  "type": "module",
  "engines": {
    "node": ">=22.0.0"
  },
  "scripts": {
    "dev": "vite",
    "build": "tsc && vite build",
    "preview": "vite preview",
-    "lint": "tsc --noEmit"
+    "lint": "tsc --noEmit",
    "test": "vitest run",
    "test:coverage": "vitest run --coverage",
    "test:watch": "vitest"
  },
  "devDependencies": {
    "@vitest/coverage-v8": "^4.1.10",
    "@vitest/ui": "^4.1.10",
    "jsdom": "^30.0.1",
    "typescript": "~6.0.2",
-    "vite": "^8.2.0"
+    "vite": "^8.2.0",
    "vitest": "^4.1.10"
  },
  "dependencies": {
    "hls.js": "^1.6.16"
@@ -21,7 +21,7 @@
 <div class="panel-card">
  <div class="table-wrap">
-        <table class="data-table">
+    <table class="data-table chat-log-table">
      <thead>
        <tr>
          <th><input type="checkbox" id="chat-log-select-all" title="Select all" /></th>
@@ -13,7 +13,8 @@
  <section class="panel-card">
    <h2>New Action</h2>
    <form id="moderation-form" class="form-stack">
-            <label>Action
+      <label
        >Action
        <select id="mod-action" class="text-input">
          <option value="mute">mute</option>
          <option value="ban">ban</option>
@@ -21,17 +22,26 @@
          <option value="timeout">timeout</option>
        </select>
      </label>
-            <label>Target
+      <label
        >Target
        <input id="mod-target" class="text-input" type="text" placeholder="username or message id" required />
      </label>
-            <label>Moderator
+      <label
        >Moderator
        <input id="mod-moderator" class="text-input" type="text" placeholder="admin" />
      </label>
-            <label>Room
+      <label
        >Room
        <input id="mod-room" class="text-input" type="text" placeholder="main" />
      </label>
-            <label>Reason
+      <label
-                <textarea id="mod-reason" class="text-input text-area" placeholder="Explain why this action is needed" required></textarea>
+        >Reason
        <textarea
          id="mod-reason"
          class="text-input text-area"
          placeholder="Explain why this action is needed"
          required
        ></textarea>
      </label>
      <button id="mod-submit" type="submit" class="btn btn-primary">Submit action</button>
      <p id="moderation-status" class="status-line" aria-live="polite">Loading moderation logs...</p>
@@ -7,7 +7,10 @@
 </div>
 <div class="panel-card">
-    <p class="small-muted"><span id="schedule-matched-entries">0</span>/<span id="schedule-total-entries">0</span> matched • total runtime <span id="schedule-total-runtime">00:00:00</span></p>
+  <p class="small-muted">
    <span id="schedule-matched-entries">0</span>/<span id="schedule-total-entries">0</span> matched • total runtime
    <span id="schedule-total-runtime">00:00:00</span>
  </p>
  <div class="table-wrap">
    <table class="data-table">
      <thead>
@@ -56,8 +56,13 @@
 <div class="panel-card">
  <h2>Runtime Configuration</h2>
  <form id="config-form" class="form-stack" style="max-width: 400px">
    <label>HLS Segment Duration (seconds) <input id="config-hls-duration" type="number" min="2" max="15" class="text-input" /></label>
    <label>HLS Window Size (segments) <input id="config-hls-window" type="number" min="3" max="100" class="text-input" /></label>
    <label>Matomo URL <input id="config-matomo-url" type="url" class="text-input" placeholder="https://..." /></label>
    <label>Matomo Site ID <input id="config-matomo-site-id" type="text" class="text-input" /></label>
    <label>Rate Limit Max <input id="config-rate-max" type="number" class="text-input" /></label>
    <label>Rate Limit Window (seconds) <input id="config-rate-window" type="number" class="text-input" /></label>
    <p class="small-muted">HLS changes take effect after restarting the playout service.</p>
    <button type="submit" class="btn btn-primary">Save Config</button>
  </form>
  <p id="config-status" class="status-line" aria-live="polite"></p>
@@ -8,7 +8,9 @@
 <div id="upload-dropzone" class="upload-dropzone">
  <input type="file" id="video-upload" accept="video/*,.mp4,.mov,.mkv,.webm" hidden />
-    <button id="upload-trigger-btn" type="button" class="btn btn-primary btn-large">Drag and Drop or Click to Upload</button>
+  <button id="upload-trigger-btn" type="button" class="btn btn-primary btn-large">
    Drag and Drop or Click to Upload
  </button>
  <p class="small-muted">Resumable chunk upload enabled • up to 2GB per file.</p>
  <div id="media-upload-progress-wrap" class="upload-progress" hidden>
    <progress id="media-upload-progress" value="0" max="100"></progress>
@@ -0,0 +1,378 @@
 /// <reference types="vitest" />
 import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
 import { refreshAnalytics, refreshOverview, renderPlaylistSortable, savePlaylist } from "../src/admin";
 // Mock fetch globally
 let fetchCalls: { url: string; options?: RequestInit }[] = [];
 let mockFetchResponse: any = { ok: true, payload: {} };
 beforeEach(() => {
  fetchCalls = [];
  globalThis.fetch = vi.fn(async (url: string, options?: RequestInit) => {
    fetchCalls.push({ url, options });
    const payload = mockFetchResponse.payload ?? {};
    return Promise.resolve(
      new Response(JSON.stringify(payload), {
        status: mockFetchResponse.ok ? 200 : mockFetchResponse.status || 500,
        headers: { "Content-Type": "application/json" },
      }),
    );
  }) as any;
  // Mock localStorage
  const storage = new Map<string, string>();
  Object.defineProperty(window, "localStorage", {
    value: {
      getItem: vi.fn((key: string) => storage.get(key) ?? null),
      setItem: vi.fn((key: string, val: string) => storage.set(key, val)),
      removeItem: vi.fn((key: string) => storage.delete(key)),
    },
    writable: true,
  });
  // Mock window.confirm/prompt
  vi.spyOn(window, "confirm").mockReturnValue(true);
  vi.spyOn(window, "prompt").mockReturnValue(null);
  vi.spyOn(console, "error").mockImplementation(() => {});
 });
 afterEach(() => {
  vi.restoreAllMocks();
 });
 // Import after mocks are set
 import "../src/admin";
 describe("admin.ts initialization", () => {
  it("loads and exposes tab switching", () => {
    // After import, init() runs on DOMContentLoaded
    // Test that the document has admin page structure
    expect(document.body).toBeDefined();
  });
 });
 describe("upload progress helpers", () => {
  it("renders upload progress correctly", async () => {
    // Set up DOM for upload page
    document.body.innerHTML = `
      <div id="media-upload-progress-wrap" hidden>
        <progress id="media-upload-progress" max="100" value="0"></progress>
        <span id="media-upload-progress-text"></span>
      </div>
      <div id="tab-content"></div>
    `;
    // Re-import triggers init again — but we need fresh module state
    // For now test internal helper access via body
    const wrap = document.getElementById("media-upload-progress-wrap")!;
    const bar = document.getElementById("media-upload-progress") as HTMLProgressElement;
    const text = document.getElementById("media-upload-progress-text")!;
    expect(wrap.hidden).toBe(true);
    // Simulate what setUploadProgress would do
    wrap.hidden = false;
    bar.max = 100;
    bar.value = 50;
    text.textContent = "Uploading (50%)";
    expect(wrap.hidden).toBe(false);
    expect(bar.value).toBe(50);
    expect(text.textContent).toBe("Uploading (50%)");
  });
 });
 describe("file fingerprint", () => {
  it("generates unique fingerprints for different files", () => {
    const f1 = new File(["a"], "video1.mp4", { lastModified: 1 });
    const f2 = new File(["b"], "video2.mp4", { lastModified: 2 });
    const fp1 = `${f1.name}:${f1.size}:${f1.lastModified}`;
    const fp2 = `${f2.name}:${f2.size}:${f2.lastModified}`;
    expect(fp1).not.toBe(fp2);
    expect(fp1).toBe("video1.mp4:1:1");
    expect(fp2).toBe("video2.mp4:1:2");
  });
 });
 describe("MAX_UPLOAD_BYTES constant", () => {
  it("equals 2GB", () => {
    expect(2 * 1024 * 1024 * 1024).toBe(2147483648);
  });
 });
 describe("API calls on tab load", () => {
  beforeEach(() => {
    document.body.innerHTML = `
      <div id="tab-content"><div id="overview-content"></div></div>
      <nav class="admin-nav">
        <button data-tab="dashboard">Dashboard</button>
        <button data-tab="analytics">Analytics</button>
        <button data-tab="playlist">Playlist</button>
        <button data-tab="schedule">Schedule</button>
        <button data-tab="system">System</button>
        <button data-tab="upload">Upload</button>
        <button data-tab="users">Users</button>
        <button data-tab="moderation">Moderation</button>
        <button data-tab="chat-log">Chat Log</button>
      </nav>
      <div id="overview-stats"></div>
      <div id="analytics-stats"></div>
      <div id="playlist-editor"></div>
      <div id="schedule-list"></div>
      <div id="system-summary"></div>
      <div id="media-upload-progress-wrap" hidden>
        <progress id="media-upload-progress"></progress>
        <span id="media-upload-progress-text"></span>
      </div>
      <div id="media-table-body"></div>
      <div id="users-table-body"></div>
      <div id="moderation-log-table-body"></div>
      <div id="chat-log-table-body"></div>
      <div id="chat-log-pagination"></div>
      <div id="config-editor"></div>
      <span id="restart-status"></span>
      <div id="schedule-override-list"></div>
    `;
  });
  it("can be imported without crashing", () => {
    // admin.ts initialization should not throw
    expect(true).toBe(true);
  });
 });
 describe("admin data refresh", () => {
  beforeEach(() => {
    document.body.innerHTML = `
      <div id="overview-status"></div>
      <span id="stat-viewers"></span>
      <span id="stat-stored-messages"></span>
      <span id="stat-moderation-actions"></span>
      <span id="stat-media-runtime"></span>
      <span id="stat-media-count"></span>
      <span id="system-stored-messages"></span>
      <span id="system-redis-clients"></span>
      <span id="system-redis-enabled"></span>
      <span id="system-redis-memory"></span>
      <span id="system-db-driver"></span>
      <span id="system-generated-at"></span>
      <div id="analytics-status"></div>
      <span id="analytics-total-messages"></span>
      <span id="analytics-messages-24h"></span>
      <span id="analytics-distinct-rooms"></span>
      <span id="analytics-moderation-actions"></span>
      <span id="analytics-generated-at"></span>
      <table><tbody id="analytics-table-body"></tbody></table>
    `;
  });
  it("renders overview stats from the admin overview API", async () => {
    mockFetchResponse = {
      ok: true,
      payload: {
        viewers: 12,
        storedMessages: 345,
        moderationActions: 9,
        mediaTotalRuntime: "01:23:45",
        mediaCount: 7,
        redisClients: 4,
        redisEnabled: true,
        redisMemoryUsed: "18 MB",
        databaseDriver: "sqlite",
        generatedAt: "2026-08-08T12:00:00Z",
      },
    };
    await refreshOverview();
    expect(document.getElementById("stat-viewers")?.textContent).toBe("12");
    expect(document.getElementById("stat-stored-messages")?.textContent).toBe("345");
    expect(document.getElementById("system-redis-enabled")?.textContent).toBe("yes");
    expect(document.getElementById("overview-status")?.textContent).toContain("2026-08-08T12:00:00Z");
  });
  it("renders analytics rows from the analytics API", async () => {
    mockFetchResponse = {
      ok: true,
      payload: {
        totalMessages: 1000,
        messagesLast24Hours: 75,
        distinctRooms: 3,
        moderationActions: 11,
        generatedAt: "2026-08-08T12:30:00Z",
        topRooms: [
          { room: "main", messageCount: 55 },
          { room: "lobby", messageCount: 20 },
        ],
      },
    };
    await refreshAnalytics();
    expect(document.getElementById("analytics-total-messages")?.textContent).toBe("1000");
    expect(document.getElementById("analytics-messages-24h")?.textContent).toBe("75");
    expect(document.getElementById("analytics-table-body")?.textContent).toContain("main");
    expect(document.getElementById("analytics-table-body")?.textContent).toContain("lobby");
  });
 });
 describe("playlist management", () => {
  beforeEach(() => {
    document.body.innerHTML = `
      <div id="playlist-status"></div>
      <textarea id="playlist-content">file '/app/media/demo1.mp4'
 file '/app/media/demo2.mp4'
 </textarea>
      <ul id="playlist-sortable"></ul>
      <div id="playlist-warnings" hidden></div>
    `;
  });
  it("saves playlist via PUT request", async () => {
    mockFetchResponse = { ok: true, payload: {} };
    await savePlaylist();
    const putCall = fetchCalls.find((c) => c.options?.method === "PUT");
    expect(putCall).toBeDefined();
    expect(putCall?.url).toBe("/api/admin/playlist");
    expect(putCall?.options?.headers).toEqual({ "Content-Type": "application/json" });
    const body = JSON.parse(putCall?.options?.body as string);
    expect(body.content).toContain("demo1.mp4");
  });
  it("sets error status on save failure", async () => {
    mockFetchResponse = { ok: false, status: 500, payload: {} };
    await savePlaylist();
    const status = document.getElementById("playlist-status");
    expect(status?.textContent).toContain("Failed");
  });
  it("renders sortable playlist with indexes and paths", () => {
    renderPlaylistSortable("file '/app/media/demo1.mp4'\nfile '/app/media/demo2.mp4'\n");
    const list = document.getElementById("playlist-sortable")!;
    expect(list.children).toHaveLength(2);
    expect(list.innerHTML).toContain("demo1.mp4");
    expect(list.innerHTML).toContain("demo2.mp4");
    expect(list.querySelector(".sortable-index")?.textContent).toBe("1");
    expect(list.querySelector("[data-remove]")).toBeTruthy();
  });
  it("skips comment and blank lines in sortable", () => {
    renderPlaylistSortable("# comment\n\nfile '/app/media/demo1.mp4'\n");
    const list = document.getElementById("playlist-sortable")!;
    expect(list.children).toHaveLength(1);
    expect(list.innerHTML).toContain("demo1.mp4");
  });
 });
 describe("admin accessibility", () => {
  beforeEach(() => {
    document.body.innerHTML = `
      <nav class="admin-nav" aria-label="Admin navigation">
        <button data-tab="dashboard" aria-current="page">Dashboard</button>
        <button data-tab="playlist">Playlist</button>
        <button data-tab="users">Users</button>
        <button data-tab="moderation">Moderation</button>
      </nav>
      <div id="tab-content"></div>
    `;
  });
  it("nav has aria-label for screen readers", () => {
    const nav = document.querySelector(".admin-nav");
    expect(nav?.getAttribute("aria-label")).toBe("Admin navigation");
  });
  it("active tab has aria-current attribute", () => {
    const active = document.querySelector("[aria-current]");
    expect(active).toBeTruthy();
    expect(active?.getAttribute("aria-current")).toBe("page");
  });
  it("all nav buttons are focusable", () => {
    const buttons = document.querySelectorAll(".admin-nav button");
    buttons.forEach((btn) => {
      expect(btn.getAttribute("tabindex")).toBeNull();
      expect(btn.getAttribute("disabled")).toBeNull();
    });
  });
 });
 describe("admin responsive layout", () => {
  beforeEach(() => {
    document.body.innerHTML = `
      <nav class="admin-nav"><button data-tab="dashboard">Dashboard</button></nav>
      <div id="tab-content"><div id="overview-content">Overview data</div></div>
    `;
  });
  it("tab content is present and visible", () => {
    const tabContent = document.getElementById("tab-content");
    expect(tabContent).toBeTruthy();
    const style = window.getComputedStyle(tabContent!);
    expect(style.display).not.toBe("none");
  });
  it("admin nav contains essential tabs", () => {
    const buttons = document.querySelectorAll(".admin-nav button");
    const tabs = Array.from(buttons).map((b) => b.textContent?.trim());
    expect(tabs).toContain("Dashboard");
  });
 });
 describe("admin data refresh failures", () => {
  beforeEach(() => {
    document.body.innerHTML = `
      <div id="overview-status"></div>
      <div id="analytics-status"></div>
    `;
  });
  it("sets error status when overview fails", async () => {
    mockFetchResponse = { ok: false, status: 500, payload: {} };
    await refreshOverview();
    expect(document.getElementById("overview-status")?.textContent).toContain("Failed");
  });
  it("sets error status when analytics fails", async () => {
    mockFetchResponse = { ok: false, status: 500, payload: {} };
    await refreshAnalytics();
    expect(document.getElementById("analytics-status")?.textContent).toContain("Failed");
  });
 });
 describe("playlist status badges", () => {
  beforeEach(() => {
    document.body.innerHTML = `<ul id="playlist-sortable"></ul>`;
  });
  it("renders badges for every media status", () => {
    const statusMap = new Map<string, string>([
      ["/app/media/ready.mp4", "ready"],
      ["/app/media/needs.mp4", "needs_normalization"],
      ["/app/media/normalizing.mp4", "normalizing"],
      ["/app/media/failed.mp4", "normalization_failed"],
      ["/app/media/other.mp4", "weird"],
    ]);
    renderPlaylistSortable(
      "file '/app/media/ready.mp4'\nfile '/app/media/needs.mp4'\nfile '/app/media/normalizing.mp4'\nfile '/app/media/failed.mp4'\nfile '/app/media/other.mp4'\nfile '/app/media/nopath.mp4'\n",
      statusMap,
    );
    const list = document.getElementById("playlist-sortable")!;
    expect(list.innerHTML).toContain("badge-ok");
    expect(list.innerHTML).toContain("badge-warn");
    expect(list.innerHTML).toContain("badge-info");
    expect(list.innerHTML).toContain("badge-danger");
    expect(list.innerHTML).toContain("badge-muted"); // default + unknown fall back to muted
    expect(list.children).toHaveLength(6);
  });
 });
@@ -16,26 +16,22 @@ type MediaEntry = {
  runtime?: string;
  modifiedAt?: string;
  tags?: string;
  path?: string;
 };
 const bodyDataset = document.body.dataset;
-const moderationLogLimit = Number.parseInt(
+const moderationLogLimit = Number.parseInt(bodyDataset.adminModerationLogLimit || "", 10);
  bodyDataset.adminModerationLogLimit || "",
  10,
 );
 const adminConfig = {
  defaultModerator: bodyDataset.adminDefaultModerator || "admin",
  defaultRoom: bodyDataset.adminDefaultRoom || "main",
-  moderationLogLimit:
+  moderationLogLimit: Number.isFinite(moderationLogLimit) && moderationLogLimit > 0 ? moderationLogLimit : 50,
    Number.isFinite(moderationLogLimit) && moderationLogLimit > 0
      ? moderationLogLimit
      : 50,
 };
 const MAX_UPLOAD_BYTES = 2 * 1024 * 1024 * 1024;
 const UPLOAD_CHUNK_BYTES = 8 * 1024 * 1024;
 const UPLOAD_RESUME_KEY_PREFIX = "linearvoid-upload-resume:";
 const API_URL = import.meta.env.VITE_PUBLIC_APP_URL?.trim() || window.location.origin;
 const state = {
  mediaUploading: false,
@@ -43,16 +39,11 @@ const state = {
  playlistSaving: false,
 };
-const uploadProgressWrap = () =>
+const uploadProgressWrap = () => document.getElementById("media-upload-progress-wrap") as HTMLElement | null;
  document.getElementById("media-upload-progress-wrap") as HTMLElement | null;
-const uploadProgressBar = () =>
+const uploadProgressBar = () => document.getElementById("media-upload-progress") as HTMLProgressElement | null;
  document.getElementById(
    "media-upload-progress",
  ) as HTMLProgressElement | null;
-const uploadProgressText = () =>
+const uploadProgressText = () => document.getElementById("media-upload-progress-text") as HTMLElement | null;
  document.getElementById("media-upload-progress-text") as HTMLElement | null;
 const setUploadProgress = (value: number, total: number, label: string) => {
  const wrap = uploadProgressWrap();
@@ -73,11 +64,9 @@ const hideUploadProgress = () => {
  if (wrap) wrap.hidden = true;
 };
-const getFileFingerprint = (file: File) =>
+const getFileFingerprint = (file: File) => `${file.name}:${file.size}:${file.lastModified}`;
  `${file.name}:${file.size}:${file.lastModified}`;
-const getResumeStorageKey = (fingerprint: string) =>
+const getResumeStorageKey = (fingerprint: string) => `${UPLOAD_RESUME_KEY_PREFIX}${fingerprint}`;
  `${UPLOAD_RESUME_KEY_PREFIX}${fingerprint}`;
 const getStoredUploadId = (fingerprint: string) => {
  try {
@@ -143,7 +132,7 @@ const pageCache: Record<string, string> = {};
 async function loadPageContent(tabName: string): Promise<string> {
  if (pageCache[tabName]) return pageCache[tabName];
-  const response = await fetch(`/admin/${tabName}.html`);
+  const response = await fetch(`${API_URL}/admin/${tabName}.html`);
  if (!response.ok) throw new Error(`Failed to load page: ${tabName}`);
  const html = await response.text();
  pageCache[tabName] = html;
@@ -185,9 +174,9 @@ async function switchTab(tabName: string) {
  if (tabName === "system") refreshSystemSummary();
 }
-async function refreshOverview() {
+export async function refreshOverview() {
  try {
-    const response = await fetch("/api/admin/overview");
+    const response = await fetch(`${API_URL}/api/admin/overview`);
    if (!response.ok) throw new Error(`HTTP ${response.status}`);
    const payload = await response.json();
@@ -211,20 +200,17 @@ async function refreshOverview() {
  }
 }
-async function refreshAnalytics() {
+export async function refreshAnalytics() {
  setStatus("analytics-status", "Loading analytics...");
  try {
-    const response = await fetch("/api/admin/analytics");
+    const response = await fetch(`${API_URL}/api/admin/analytics`);
    if (!response.ok) throw new Error(`HTTP ${response.status}`);
    const payload = await response.json();
    setText("analytics-total-messages", String(payload.totalMessages ?? 0));
    setText("analytics-messages-24h", String(payload.messagesLast24Hours ?? 0));
    setText("analytics-distinct-rooms", String(payload.distinctRooms ?? 0));
-    setText(
+    setText("analytics-moderation-actions", String(payload.moderationActions ?? 0));
      "analytics-moderation-actions",
      String(payload.moderationActions ?? 0),
    );
    setText("analytics-generated-at", payload.generatedAt || "unavailable");
    const tbody = document.getElementById("analytics-table-body");
@@ -255,16 +241,15 @@ async function refreshAnalytics() {
 async function refreshPlaylist() {
  setStatus("playlist-status", "Loading playlist...");
  try {
-    const response = await fetch("/api/admin/playlist");
+    const response = await fetch(`${API_URL}/api/admin/playlist`);
    if (!response.ok) throw new Error(`HTTP ${response.status}`);
    const payload = await response.json();
    const content: string = payload.content || "";
-    const textarea = document.getElementById(
+    const textarea = document.getElementById("playlist-content") as HTMLTextAreaElement | null;
      "playlist-content",
    ) as HTMLTextAreaElement | null;
    if (textarea) textarea.value = content;
-    renderPlaylistSortable(content);
+    const statusMap = await fetchMediaStatusMap();
    renderPlaylistSortable(content, statusMap);
    await showPlaylistWarnings(content);
    setStatus("playlist-status", "Playlist loaded.");
  } catch (error) {
@@ -273,17 +258,22 @@ async function refreshPlaylist() {
  }
 }
-function renderPlaylistSortable(content: string) {
+export function renderPlaylistSortable(content: string, statusMap?: Map<string, string>) {
  const list = document.getElementById("playlist-sortable");
  if (!list) return;
  const lines = content.split("\n").filter((l) => l.trim() && !l.startsWith("#"));
  list.innerHTML = lines
    .map((line, i) => {
-      const path = line.replace(/^file\s+/, "").replace(/['"]/g, "").trim();
+      const path = line
        .replace(/^file\s+/, "")
        .replace(/['"]/g, "")
        .trim();
      const badge = statusMap ? statusBadge(statusMap.get(path)) : "";
      return `<li class="sortable-item" draggable="true" data-index="${i}">
        <span class="drag-handle" aria-hidden="true">⋮⋮</span>
        <span class="sortable-index">${i + 1}</span>
        <span class="sortable-path">${path}</span>
        ${badge}
        <button type="button" class="btn btn-secondary btn-sm" data-remove="${i}">✕</button>
      </li>`;
    })
@@ -348,12 +338,17 @@ async function showPlaylistWarnings(content: string) {
      const mediaPaths = new Set((media.files || []).map((f: { path: string }) => f.path));
      const nonNorm = (media.files || []).filter((f: { status: string }) => f.status === "needs_normalization");
      for (const line of lines) {
-        const path = line.replace(/^file\s+/, "").replace(/['"]/g, "").trim();
+        const path = line
          .replace(/^file\s+/, "")
          .replace(/['"]/g, "")
          .trim();
        if (path && !mediaPaths.has(path)) msgs.push(`Missing from media library: ${path}`);
      }
      if (nonNorm.length > 0) msgs.push(`${nonNorm.length} file(s) need normalization. Run scripts/normalize.sh.`);
    }
-  } catch { /* ignore */ }
+  } catch {
    /* ignore */
  }
  if (msgs.length > 0) {
    warnings.innerHTML = msgs.map((m) => `<div class="warning-msg">⚠ ${m}</div>`).join("");
    warnings.hidden = false;
@@ -362,15 +357,87 @@ async function showPlaylistWarnings(content: string) {
  }
 }
-async function savePlaylist() {
+function statusBadge(status: string | undefined): string {
  if (!status) return `<span class="badge badge-muted">unknown</span>`;
  switch (status) {
    case "ready":
      return `<span class="badge badge-ok">ready</span>`;
    case "needs_normalization":
      return `<span class="badge badge-warn">needs normalization</span>`;
    case "normalizing":
      return `<span class="badge badge-info">normalizing</span>`;
    case "normalization_failed":
      return `<span class="badge badge-danger">failed</span>`;
    default:
      return `<span class="badge badge-muted">${status}</span>`;
  }
 }
 async function fetchMediaStatusMap(): Promise<Map<string, string>> {
  const map = new Map<string, string>();
  try {
    const resp = await fetch("/api/admin/media");
    if (!resp.ok) return map;
    const payload = await resp.json();
    for (const f of payload.files || []) {
      if (f.path) map.set(f.path, f.status || "unknown");
    }
  } catch {
    /* ignore */
  }
  return map;
 }
 async function addMediaToPlaylist(file: MediaEntry) {
  if (file.status !== "ready") {
    setStatus("media-status", "Only ready media can be added to the playlist.", true);
    return;
  }
  if (!file.path) {
    setStatus("media-status", "Cannot add media without a path.", true);
    return;
  }
  setStatus("media-status", `Adding ${file.name} to playlist...`);
  try {
    const getResp = await fetch("/api/admin/playlist");
    if (!getResp.ok) throw new Error(await readErrorMessage(getResp));
    const payload = await getResp.json();
    const content: string = payload.content || "";
    const lines = content.split("\n").filter((l) => l.trim());
    const entry = `file '${file.path}'`;
    const exists = lines.some(
      (l) =>
        l
          .replace(/^file\s+/, "")
          .replace(/['"]/g, "")
          .trim() === file.path,
    );
    if (exists) {
      setStatus("media-status", `${file.name} is already in the playlist.`, true);
      return;
    }
    lines.push(entry);
    const putResp = await fetch("/api/admin/playlist", {
      method: "PUT",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ content: lines.join("\n") + "\n" }),
    });
    if (!putResp.ok) throw new Error(await readErrorMessage(putResp));
    setStatus("media-status", `${file.name} added to playlist.`);
  } catch (error) {
    console.error("Failed to add media to playlist", error);
    const details = error instanceof Error ? error.message : "Unknown error.";
    setStatus("media-status", `Failed to add ${file.name} to playlist. (${details})`, true);
  }
 }
 export async function savePlaylist() {
  if (state.playlistSaving) return;
  state.playlistSaving = true;
  setStatus("playlist-status", "Saving playlist...");
  try {
-    const textarea = document.getElementById(
+    const textarea = document.getElementById("playlist-content") as HTMLTextAreaElement | null;
      "playlist-content",
    ) as HTMLTextAreaElement | null;
    const content = textarea?.value || "";
    const response = await fetch("/api/admin/playlist", {
@@ -415,10 +482,7 @@ async function refreshSchedule() {
      });
    }
-    setStatus(
+    setStatus("schedule-status", `Schedule loaded. Total runtime ${payload.totalRuntime || "00:00:00"}.`);
      "schedule-status",
      `Schedule loaded. Total runtime ${payload.totalRuntime || "00:00:00"}.`,
    );
  } catch (error) {
    console.error("Failed to load schedule", error);
    setStatus("schedule-status", "Failed to load schedule.", true);
@@ -445,7 +509,9 @@ async function refreshOverrides() {
    tbody.querySelectorAll("[data-delete-override]").forEach((btn) => {
      btn.addEventListener("click", () => deleteOverride(Number((btn as HTMLElement).dataset.deleteOverride)));
    });
-  } catch { /* non-critical */ }
+  } catch {
    /* non-critical */
  }
 }
 async function submitOverride(e: Event) {
@@ -457,21 +523,75 @@ async function submitOverride(e: Event) {
  const endTime = (document.getElementById("override-end") as HTMLInputElement).value;
  const reason = (document.getElementById("override-reason") as HTMLInputElement).value;
  try {
-    const resp = await fetch("/api/admin/schedule/overrides", {
+    const resp = await fetch(`${API_URL}/api/admin/schedule/overrides`, {
      method: "POST",
      headers: { "Content-Type": "application/json" },
-      body: JSON.stringify({ mediaId: Number(mediaId), startTime: new Date(startTime).toISOString(), endTime: new Date(endTime).toISOString(), reason }),
+      body: JSON.stringify({
        mediaId: Number(mediaId),
        startTime: new Date(startTime).toISOString(),
        endTime: new Date(endTime).toISOString(),
        reason,
      }),
    });
-    if (!resp.ok) { const text = await resp.text(); throw new Error(text); }
+    if (!resp.ok) {
-    if (status) { status.textContent = "Override added."; status.className = "status-line"; }
+      const text = await resp.text();
      throw new Error(text);
    }
    if (status) {
      status.textContent = "Override added.";
      status.className = "status-line";
    }
    refreshOverrides();
  } catch (err) {
-    if (status) { status.textContent = `Failed: ${err}`; status.className = "status-line status-error"; }
+    if (status) {
      status.textContent = `Failed: ${err}`;
      status.className = "status-line status-error";
    }
  }
 }
 async function deleteOverride(id: number) {
-  try { await fetch(`/api/admin/schedule/overrides?id=${id}`, { method: "DELETE" }); refreshOverrides(); } catch { /* ignore */ }
+  try {
    await fetch(`${API_URL}/api/admin/schedule/overrides?id=${id}`, { method: "DELETE" });
    refreshOverrides();
  } catch {
    /* ignore */
  }
 }
 async function renderServiceRow(service: any) {
  const svcDetail = service.detail || "";
  // playout service returns json detail, all others return `local process` or `ping ok`
  if (service.name === "playout" && svcDetail) {
    try {
      // create a list of key-value pairs for each property in the JSON object
      const detailObj = JSON.parse(svcDetail);
      // create a table of key-value pairs for each property in the JSON object
      const detailTable = Object.entries(detailObj)
        .map(([key, value]) => `<tr><td><strong>${key}</strong></td><td>${value}</td></tr>`)
        .join("");
      service.detail = `<p><table class="service-detail-table">${detailTable}</table></p>`;
    } catch {
      // ignore JSON parse errors
    }
  } else {
    service.detail = `<p>${service.detail}</p>`;
  }
  const row = document.createElement("article");
  row.className = "service-row";
  row.innerHTML = `
    <div>
      <h3>${service.name}</h3>
      <p class="small-muted">${service.checked}</p>
    </div>
    <div class="service-row-right">
      <p class="service-status service-status-${service.status}">${service.status}</p>
      ${service.detail}
    </div>
  `;
  return row;
 }
 async function refreshSystemSummary() {
@@ -493,20 +613,10 @@ async function refreshSystemSummary() {
      servicesEl.innerHTML = "";
      const services = (payload.services || []) as ServiceHealth[];
      services.forEach((service) => {
-        const row = document.createElement("article");
+        renderServiceRow(service).then((row) => {
        row.className = "service-row";
        row.innerHTML = `
          <div>
            <h3>${service.name}</h3>
            <p class="small-muted">${service.checked}</p>
          </div>
          <div class="service-row-right">
            <p class="service-status service-status-${service.status}">${service.status}</p>
            <p>${service.detail}</p>
          </div>
        `;
          servicesEl.appendChild(row);
        });
      });
    }
    setStatus("system-status", "System summary loaded.");
@@ -528,24 +638,30 @@ function renderMediaRows(files: MediaEntry[]) {
  files.forEach((file) => {
    const tr = document.createElement("tr");
    const canNormalize = file.status === "needs_normalization" || file.status === "normalization_failed";
    const canAdd = file.status === "ready";
    tr.innerHTML = `
      <td>${file.name}</td>
      <td>${file.title || "-"}</td>
      <td>${file.runtime || "00:00:00"}</td>
-      <td>${file.status || "unknown"}</td>
+      <td>${statusBadge(file.status)}</td>
      <td>${fmtSize(file.size)}</td>
      <td>${file.modifiedAt || "-"}</td>
      <td class="action-cell">
        <button type="button" class="btn btn-secondary btn-small" data-action="edit" data-id="${file.id || ""}">Edit</button>
        ${canNormalize ? `<button type="button" class="btn btn-secondary btn-small" data-action="normalize" data-id="${file.id || ""}">Normalize</button>` : ""}
        ${canAdd ? `<button type="button" class="btn btn-secondary btn-small" data-action="add" data-id="${file.id || ""}">Add to playlist</button>` : ""}
        <button type="button" class="btn btn-danger btn-small" data-action="delete" data-id="${file.id || ""}">Delete</button>
      </td>
    `;
-    tr.querySelector('[data-action="edit"]')?.addEventListener("click", () =>
+    tr.querySelector('[data-action="edit"]')?.addEventListener("click", () => editMedia(file));
-      editMedia(file),
+    if (canNormalize) {
-    );
+      tr.querySelector('[data-action="normalize"]')?.addEventListener("click", () => normalizeMedia(file));
-    tr.querySelector('[data-action="delete"]')?.addEventListener("click", () =>
+    }
-      deleteMedia(file),
+    if (canAdd) {
-    );
+      tr.querySelector('[data-action="add"]')?.addEventListener("click", () => addMediaToPlaylist(file));
    }
    tr.querySelector('[data-action="delete"]')?.addEventListener("click", () => deleteMedia(file));
    tbody.appendChild(tr);
  });
 }
@@ -612,18 +728,11 @@ async function uploadVideo(file: File) {
    const alreadyUploaded = Number(initPayload.uploadedChunks || 0);
    const effectiveTotalChunks = Number(initPayload.totalChunks || totalChunks);
-    const resumeFrom = Math.min(
+    const resumeFrom = Math.min(Math.max(alreadyUploaded, 0), effectiveTotalChunks);
      Math.max(alreadyUploaded, 0),
      effectiveTotalChunks,
    );
    setUploadProgress(resumeFrom, effectiveTotalChunks, "Uploading chunks");
-    for (
+    for (let chunkIndex = resumeFrom; chunkIndex < effectiveTotalChunks; chunkIndex += 1) {
      let chunkIndex = resumeFrom;
      chunkIndex < effectiveTotalChunks;
      chunkIndex += 1
    ) {
      const start = chunkIndex * UPLOAD_CHUNK_BYTES;
      const end = Math.min(file.size, start + UPLOAD_CHUNK_BYTES);
      const chunk = file.slice(start, end);
@@ -641,19 +750,12 @@ async function uploadVideo(file: File) {
        throw new Error(await readErrorMessage(chunkResponse));
      }
-      setUploadProgress(
+      setUploadProgress(chunkIndex + 1, effectiveTotalChunks, "Uploading chunks");
-        chunkIndex + 1,
+      setStatus("media-status", `Uploading ${file.name} (${chunkIndex + 1}/${effectiveTotalChunks} chunks)...`);
        effectiveTotalChunks,
        "Uploading chunks",
      );
      setStatus(
        "media-status",
        `Uploading ${file.name} (${chunkIndex + 1}/${effectiveTotalChunks} chunks)...`,
      );
    }
    const completeResponse = await fetch(
-      `/api/admin/media/uploads/${encodeURIComponent(uploadId)}/complete`,
+      `${API_URL}/api/admin/media/uploads/${encodeURIComponent(uploadId)}/complete`,
      {
        method: "POST",
      },
@@ -674,13 +776,8 @@ async function uploadVideo(file: File) {
    await refreshSchedule();
  } catch (error) {
    console.error("Failed to upload media", error);
-    const details =
+    const details = error instanceof Error ? error.message : "Unknown upload error.";
-      error instanceof Error ? error.message : "Unknown upload error.";
+    setStatus("media-status", `Upload interrupted. Re-select the same file to resume. (${details})`, true);
    setStatus(
      "media-status",
      `Upload interrupted. Re-select the same file to resume. (${details})`,
      true,
    );
  } finally {
    state.mediaUploading = false;
    setTimeout(() => hideUploadProgress(), 1200);
@@ -702,7 +799,7 @@ async function editMedia(file: MediaEntry) {
  setStatus("media-status", `Saving metadata for ${file.name}...`);
  try {
-    const response = await fetch(`/api/admin/media/${file.id}`, {
+    const response = await fetch(`${API_URL}/api/admin/media/${file.id}`, {
      method: "PUT",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ title, status, tags }),
@@ -719,6 +816,55 @@ async function editMedia(file: MediaEntry) {
  }
 }
 async function normalizeMedia(file: MediaEntry) {
  if (!file.id) {
    setStatus("media-status", "Cannot normalize media item without id.", true);
    return;
  }
  setStatus("media-status", `Normalizing ${file.name}...`);
  try {
    const response = await fetch(`${API_URL}/api/admin/media/${file.id}/normalize`, { method: "POST" });
    if (!response.ok) throw new Error(await readErrorMessage(response));
    setStatus("media-status", `Normalization started for ${file.name}.`);
    await refreshMediaLibrary();
    pollNormalizationStatus(file.id, 0);
  } catch (error) {
    console.error("Failed to normalize media", error);
    const details = error instanceof Error ? error.message : "Unknown error.";
    setStatus("media-status", `Failed to normalize ${file.name}. (${details})`, true);
  }
 }
 function pollNormalizationStatus(id: number, attempt: number) {
  if (attempt >= 60) {
    setStatus("media-status", "Normalization is taking longer than expected. Reload the library to check.", true);
    return;
  }
  window.setTimeout(async () => {
    try {
      const response = await fetch(`${API_URL}/api/admin/media/${id}`);
      if (!response.ok) return;
      const file = (await response.json()) as MediaEntry;
      if (file.status === "normalizing" || file.status === "needs_normalization") {
        pollNormalizationStatus(id, attempt + 1);
        return;
      }
      await refreshMediaLibrary();
      await refreshOverview();
      await refreshSchedule();
      setStatus(
        "media-status",
        file.status === "ready" ? `Normalization complete for ${file.name}.` : `Normalization failed for ${file.name}.`,
        file.status !== "ready",
      );
    } catch {
      // Stop polling on error; the user can reload the library manually.
    }
  }, 3000);
 }
 async function deleteMedia(file: MediaEntry) {
  if (!file.id) {
    setStatus("media-status", "Cannot delete media item without id.", true);
@@ -731,7 +877,7 @@ async function deleteMedia(file: MediaEntry) {
  setStatus("media-status", `Deleting ${file.name}...`);
  try {
-    const response = await fetch(`/api/admin/media/${file.id}`, {
+    const response = await fetch(`${API_URL}/api/admin/media/${file.id}`, {
      method: "DELETE",
    });
    if (!response.ok) throw new Error(`HTTP ${response.status}`);
@@ -749,9 +895,7 @@ async function deleteMedia(file: MediaEntry) {
 async function refreshModerationLogs() {
  setStatus("moderation-status", "Loading moderation logs...");
  try {
-    const response = await fetch(
+    const response = await fetch(`${API_URL}/api/admin/moderation/logs?limit=${adminConfig.moderationLogLimit}`);
      `/api/admin/moderation/logs?limit=${adminConfig.moderationLogLimit}`,
    );
    if (!response.ok) throw new Error(`HTTP ${response.status}`);
    const payload = await response.json();
@@ -787,10 +931,8 @@ async function submitModerationAction(event: Event) {
  const payload = {
    action: (document.getElementById("mod-action") as HTMLSelectElement).value,
    target: (document.getElementById("mod-target") as HTMLInputElement).value,
-    moderator: (document.getElementById("mod-moderator") as HTMLInputElement)
+    moderator: (document.getElementById("mod-moderator") as HTMLInputElement).value,
-      .value,
+    reason: (document.getElementById("mod-reason") as HTMLTextAreaElement).value,
    reason: (document.getElementById("mod-reason") as HTMLTextAreaElement)
      .value,
    room: (document.getElementById("mod-room") as HTMLInputElement).value,
  };
@@ -854,7 +996,7 @@ async function refreshChatLog() {
    if (chatLogState.username) params.set("username", chatLogState.username);
    if (chatLogState.text) params.set("text", chatLogState.text);
-    const response = await fetch(`/api/admin/chat-log?${params}`);
+    const response = await fetch(`${API_URL}/api/admin/chat-log?${params}`);
    if (!response.ok) throw new Error(`HTTP ${response.status}`);
    const payload = await response.json();
@@ -865,10 +1007,7 @@ async function refreshChatLog() {
    renderChatLogTable();
    updateChatLogPagination();
    updateBulkDeleteButton();
-    setStatus(
+    setStatus("chat-log-status", `Loaded ${chatLogState.entries.length} entries.`);
      "chat-log-status",
      `Loaded ${chatLogState.entries.length} entries.`,
    );
  } catch (error) {
    console.error("Failed to load chat log", error);
    setStatus("chat-log-status", "Failed to load chat log.", true);
@@ -908,10 +1047,7 @@ function renderChatLogTable() {
    tr.querySelector('[data-action="chat-ban"]')?.addEventListener("click", () => {
      if (confirm(`Ban ${entry.username}?`)) userAction("ban", entry.username);
    });
-    tr.querySelector('[data-action="delete-chat"]')?.addEventListener(
+    tr.querySelector('[data-action="delete-chat"]')?.addEventListener("click", () => deleteChatEntry(entry.id));
      "click",
      () => deleteChatEntry(entry.id),
    );
    tr.querySelector(".chat-log-checkbox")?.addEventListener("change", (e) => {
      const cb = e.target as HTMLInputElement;
      if (cb.checked) {
@@ -929,38 +1065,27 @@ function renderChatLogTable() {
 }
 function updateSelectAllCheckbox() {
-  const selectAll = document.getElementById(
+  const selectAll = document.getElementById("chat-log-select-all") as HTMLInputElement | null;
    "chat-log-select-all",
  ) as HTMLInputElement | null;
  if (!selectAll) return;
  const allSelected =
-    chatLogState.entries.length > 0 &&
+    chatLogState.entries.length > 0 && chatLogState.entries.every((e) => chatLogState.selected.has(e.id));
    chatLogState.entries.every((e) => chatLogState.selected.has(e.id));
  selectAll.checked = allSelected;
 }
 function updateBulkDeleteButton() {
-  const btn = document.getElementById(
+  const btn = document.getElementById("bulk-delete-chat-log-btn") as HTMLButtonElement | null;
    "bulk-delete-chat-log-btn",
  ) as HTMLButtonElement | null;
  if (!btn) return;
  btn.disabled = chatLogState.selected.size === 0;
 }
 function updateChatLogPagination() {
-  const prevBtn = document.getElementById(
+  const prevBtn = document.getElementById("chat-log-prev-btn") as HTMLButtonElement | null;
-    "chat-log-prev-btn",
+  const nextBtn = document.getElementById("chat-log-next-btn") as HTMLButtonElement | null;
  ) as HTMLButtonElement | null;
  const nextBtn = document.getElementById(
    "chat-log-next-btn",
  ) as HTMLButtonElement | null;
  const info = document.getElementById("chat-log-page-info");
  if (prevBtn) prevBtn.disabled = !chatLogState.before;
-  if (nextBtn)
+  if (nextBtn) nextBtn.disabled = chatLogState.entries.length < chatLogState.limit;
-    nextBtn.disabled = chatLogState.entries.length < chatLogState.limit;
+  if (info) info.textContent = `Showing ${chatLogState.entries.length} of ${chatLogState.total}`;
  if (info)
    info.textContent = `Showing ${chatLogState.entries.length} of ${chatLogState.total}`;
 }
 function chatLogNextPage() {
@@ -975,29 +1100,17 @@ function chatLogPrevPage() {
 }
 function chatLogApplyFilter() {
-  chatLogState.room =
+  chatLogState.room = (document.getElementById("chat-log-filter-room") as HTMLInputElement)?.value || "";
-    (document.getElementById("chat-log-filter-room") as HTMLInputElement)
+  chatLogState.username = (document.getElementById("chat-log-filter-username") as HTMLInputElement)?.value || "";
-      ?.value || "";
+  chatLogState.text = (document.getElementById("chat-log-filter-text") as HTMLInputElement)?.value || "";
  chatLogState.username =
    (document.getElementById("chat-log-filter-username") as HTMLInputElement)
      ?.value || "";
  chatLogState.text =
    (document.getElementById("chat-log-filter-text") as HTMLInputElement)
      ?.value || "";
  chatLogState.before = "";
  refreshChatLog();
 }
 function chatLogClearFilter() {
-  const roomEl = document.getElementById(
+  const roomEl = document.getElementById("chat-log-filter-room") as HTMLInputElement | null;
-    "chat-log-filter-room",
+  const userEl = document.getElementById("chat-log-filter-username") as HTMLInputElement | null;
-  ) as HTMLInputElement | null;
+  const textEl = document.getElementById("chat-log-filter-text") as HTMLInputElement | null;
  const userEl = document.getElementById(
    "chat-log-filter-username",
  ) as HTMLInputElement | null;
  const textEl = document.getElementById(
    "chat-log-filter-text",
  ) as HTMLInputElement | null;
  if (roomEl) roomEl.value = "";
  if (userEl) userEl.value = "";
  if (textEl) textEl.value = "";
@@ -1009,12 +1122,11 @@ function chatLogClearFilter() {
 }
 async function deleteChatEntry(id: number) {
-  if (!window.confirm(`Delete chat message #${id}? This cannot be undone.`))
+  if (!window.confirm(`Delete chat message #${id}? This cannot be undone.`)) return;
    return;
  setStatus("chat-log-status", `Deleting message #${id}...`);
  try {
-    const response = await fetch(`/api/admin/chat-log/${id}`, {
+    const response = await fetch(`${API_URL}/api/admin/chat-log/${id}`, {
      method: "DELETE",
    });
    if (!response.ok) throw new Error(`HTTP ${response.status}`);
@@ -1030,17 +1142,9 @@ async function deleteChatEntry(id: number) {
 async function bulkDeleteChatLog() {
  if (chatLogState.selected.size === 0) return;
-  if (
+  if (!window.confirm(`Delete ${chatLogState.selected.size} selected messages? This cannot be undone.`)) return;
    !window.confirm(
      `Delete ${chatLogState.selected.size} selected messages? This cannot be undone.`,
    )
  )
    return;
-  setStatus(
+  setStatus("chat-log-status", `Deleting ${chatLogState.selected.size} messages...`);
    "chat-log-status",
    `Deleting ${chatLogState.selected.size} messages...`,
  );
  try {
    const ids = Array.from(chatLogState.selected);
    const response = await fetch("/api/admin/chat-log/bulk", {
@@ -1050,10 +1154,7 @@ async function bulkDeleteChatLog() {
    });
    if (!response.ok) throw new Error(`HTTP ${response.status}`);
    const payload = await response.json();
-    setStatus(
+    setStatus("chat-log-status", `${payload.deleted || ids.length} messages deleted.`);
      "chat-log-status",
      `${payload.deleted || ids.length} messages deleted.`,
    );
    await refreshChatLog();
    await refreshOverview();
  } catch (error) {
@@ -1088,17 +1189,23 @@ async function refreshUsers() {
          </td>`;
        tbody.appendChild(tr);
      });
-      tbody.querySelectorAll(".user-mute").forEach(b => b.addEventListener("click", () => userAction("mute", (b as HTMLElement).dataset.user!)));
+      tbody
-      tbody.querySelectorAll(".user-ban").forEach(b => b.addEventListener("click", () => userAction("ban", (b as HTMLElement).dataset.user!)));
+        .querySelectorAll(".user-mute")
-      tbody.querySelectorAll(".user-unmute").forEach(b => b.addEventListener("click", () => userAction("unmute", (b as HTMLElement).dataset.user!)));
+        .forEach((b) => b.addEventListener("click", () => userAction("mute", (b as HTMLElement).dataset.user!)));
-      tbody.querySelectorAll(".user-unban").forEach(b => b.addEventListener("click", () => userAction("unban", (b as HTMLElement).dataset.user!)));
+      tbody
        .querySelectorAll(".user-ban")
        .forEach((b) => b.addEventListener("click", () => userAction("ban", (b as HTMLElement).dataset.user!)));
      tbody
        .querySelectorAll(".user-unmute")
        .forEach((b) => b.addEventListener("click", () => userAction("unmute", (b as HTMLElement).dataset.user!)));
      tbody
        .querySelectorAll(".user-unban")
        .forEach((b) => b.addEventListener("click", () => userAction("unban", (b as HTMLElement).dataset.user!)));
    }
    setStatus(
      "users-status",
-      payload.redisEnabled
+      payload.redisEnabled ? "Active users loaded." : "Redis disabled; no live presence data available.",
        ? "Active users loaded."
        : "Redis disabled; no live presence data available.",
    );
  } catch (error) {
    console.error("Failed to load users", error);
@@ -1127,7 +1234,13 @@ async function loadConfig() {
    const cfg = await resp.json();
    (document.getElementById("config-rate-max") as HTMLInputElement).value = cfg.rateLimitMax;
    (document.getElementById("config-rate-window") as HTMLInputElement).value = cfg.rateLimitWindowSec;
-  } catch { /* non-critical */ }
+    (document.getElementById("config-hls-duration") as HTMLInputElement).value = cfg.hlsSegmentDuration;
    (document.getElementById("config-hls-window") as HTMLInputElement).value = cfg.hlsWindowSize;
    (document.getElementById("config-matomo-url") as HTMLInputElement).value = cfg.matomoUrl || "";
    (document.getElementById("config-matomo-site-id") as HTMLInputElement).value = cfg.matomoSiteId || "";
  } catch {
    /* non-critical */
  }
 }
 async function saveConfig(e: Event) {
@@ -1139,14 +1252,22 @@ async function saveConfig(e: Event) {
      method: "PUT",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({
-        rateLimitMax: Number((document.getElementById("config-rate-max") as HTMLInputElement).value),
+        hlsSegmentDuration: Number((document.getElementById("config-hls-duration") as HTMLInputElement).value),
-        rateLimitWindowSec: Number((document.getElementById("config-rate-window") as HTMLInputElement).value),
+        hlsWindowSize: Number((document.getElementById("config-hls-window") as HTMLInputElement).value),
        matomoUrl: (document.getElementById("config-matomo-url") as HTMLInputElement).value.trim(),
        matomoSiteId: (document.getElementById("config-matomo-site-id") as HTMLInputElement).value.trim(),
      }),
    });
-    if (!resp.ok) throw new Error(`HTTP ${resp.status}`);
+    if (!resp.ok) throw new Error(await readErrorMessage(resp));
-    if (status) { status.textContent = "Config saved."; status.className = "status-line"; }
+    if (status) {
      status.textContent = "Config saved.";
      status.className = "status-line";
    }
  } catch (err) {
-    if (status) { status.textContent = `Failed: ${err}`; status.className = "status-line status-error"; }
+    if (status) {
      status.textContent = `Failed: ${err}`;
      status.className = "status-line status-error";
    }
  }
 }
@@ -1155,7 +1276,7 @@ async function restartService(service: string) {
  const status = document.getElementById("restart-status");
  if (status) status.textContent = `Requesting restart of ${service}...`;
  try {
-    const resp = await fetch(`/api/admin/restart?service=${service}`, { method: "POST" });
+    const resp = await fetch(`${API_URL}/api/admin/restart?service=${service}`, { method: "POST" });
    const data = await resp.json();
    if (status) status.textContent = data.message;
  } catch (err) {
@@ -1164,9 +1285,7 @@ async function restartService(service: string) {
 }
 function bindEvents() {
-  document
+  document.querySelectorAll<HTMLButtonElement>(".tab-trigger").forEach((button) => {
    .querySelectorAll<HTMLButtonElement>(".tab-trigger")
    .forEach((button) => {
    button.addEventListener("click", () => {
      const tab = button.dataset.tab;
      if (tab) switchTab(tab);
@@ -1186,17 +1305,11 @@ function bindEvents() {
 function bindPageEvents(tabName: string) {
  switch (tabName) {
    case "upload":
-      document
+      document.getElementById("reload-media-btn")?.addEventListener("click", refreshMediaLibrary);
        .getElementById("reload-media-btn")
        ?.addEventListener("click", refreshMediaLibrary);
-      const uploadInput = document.getElementById(
+      const uploadInput = document.getElementById("video-upload") as HTMLInputElement | null;
        "video-upload",
      ) as HTMLInputElement | null;
      const uploadDropzone = document.getElementById("upload-dropzone");
-      document
+      document.getElementById("upload-trigger-btn")?.addEventListener("click", () => uploadInput?.click());
        .getElementById("upload-trigger-btn")
        ?.addEventListener("click", () => uploadInput?.click());
      uploadDropzone?.addEventListener("dragover", (event) => {
        event.preventDefault();
@@ -1221,64 +1334,34 @@ function bindPageEvents(tabName: string) {
      break;
    case "playlist":
-      document
+      document.getElementById("reload-playlist-btn")?.addEventListener("click", refreshPlaylist);
-        .getElementById("reload-playlist-btn")
+      document.getElementById("save-playlist-btn")?.addEventListener("click", savePlaylist);
        ?.addEventListener("click", refreshPlaylist);
      document
        .getElementById("save-playlist-btn")
        ?.addEventListener("click", savePlaylist);
      break;
    case "schedule":
-      document
+      document.getElementById("reload-schedule-btn")?.addEventListener("click", refreshSchedule);
-        .getElementById("reload-schedule-btn")
+      document.getElementById("override-form")?.addEventListener("submit", submitOverride);
        ?.addEventListener("click", refreshSchedule);
      document
        .getElementById("override-form")
        ?.addEventListener("submit", submitOverride);
      refreshOverrides();
      break;
    case "moderation":
-      document
+      document.getElementById("reload-moderation-btn")?.addEventListener("click", refreshModerationLogs);
-        .getElementById("reload-moderation-btn")
+      document.getElementById("export-chat-log-btn")?.addEventListener("click", () => {
        ?.addEventListener("click", refreshModerationLogs);
      document
        .getElementById("export-chat-log-btn")
        ?.addEventListener("click", () => {
        window.open("/api/admin/chat-log/export", "_blank");
      });
-      document
+      document.getElementById("moderation-form")?.addEventListener("submit", submitModerationAction);
-        .getElementById("moderation-form")
+      (document.getElementById("mod-moderator") as HTMLInputElement).value = adminConfig.defaultModerator;
-        ?.addEventListener("submit", submitModerationAction);
+      (document.getElementById("mod-room") as HTMLInputElement).value = adminConfig.defaultRoom;
      (document.getElementById("mod-moderator") as HTMLInputElement).value =
        adminConfig.defaultModerator;
      (document.getElementById("mod-room") as HTMLInputElement).value =
        adminConfig.defaultRoom;
      break;
    case "chat-log":
-      document
+      document.getElementById("reload-chat-log-btn")?.addEventListener("click", refreshChatLog);
-        .getElementById("reload-chat-log-btn")
+      document.getElementById("bulk-delete-chat-log-btn")?.addEventListener("click", bulkDeleteChatLog);
-        ?.addEventListener("click", refreshChatLog);
+      document.getElementById("chat-log-filter-btn")?.addEventListener("click", chatLogApplyFilter);
-      document
+      document.getElementById("chat-log-clear-filter-btn")?.addEventListener("click", chatLogClearFilter);
-        .getElementById("bulk-delete-chat-log-btn")
+      document.getElementById("chat-log-prev-btn")?.addEventListener("click", chatLogPrevPage);
-        ?.addEventListener("click", bulkDeleteChatLog);
+      document.getElementById("chat-log-next-btn")?.addEventListener("click", chatLogNextPage);
-      document
+      document.getElementById("chat-log-select-all")?.addEventListener("change", (e) => {
        .getElementById("chat-log-filter-btn")
        ?.addEventListener("click", chatLogApplyFilter);
      document
        .getElementById("chat-log-clear-filter-btn")
        ?.addEventListener("click", chatLogClearFilter);
      document
        .getElementById("chat-log-prev-btn")
        ?.addEventListener("click", chatLogPrevPage);
      document
        .getElementById("chat-log-next-btn")
        ?.addEventListener("click", chatLogNextPage);
      document
        .getElementById("chat-log-select-all")
        ?.addEventListener("change", (e) => {
        const checked = (e.target as HTMLInputElement).checked;
        chatLogState.entries.forEach((entry) => {
          if (checked) {
@@ -1293,27 +1376,19 @@ function bindPageEvents(tabName: string) {
      break;
    case "analytics":
-      document
+      document.getElementById("reload-analytics-btn")?.addEventListener("click", refreshAnalytics);
        .getElementById("reload-analytics-btn")
        ?.addEventListener("click", refreshAnalytics);
      break;
    case "users":
-      document
+      document.getElementById("reload-users-btn")?.addEventListener("click", refreshUsers);
        .getElementById("reload-users-btn")
        ?.addEventListener("click", refreshUsers);
      break;
    case "system":
      document.getElementById("reload-system-btn")?.addEventListener("click", refreshSystemSummary);
      document.getElementById("config-form")?.addEventListener("submit", saveConfig);
      document
-        .getElementById("reload-system-btn")
+        .querySelectorAll(".restart-btn")
-        ?.addEventListener("click", refreshSystemSummary);
+        .forEach((btn) => btn.addEventListener("click", () => restartService((btn as HTMLElement).dataset.service!)));
      document
        .getElementById("config-form")
        ?.addEventListener("submit", saveConfig);
      document.querySelectorAll(".restart-btn").forEach((btn) =>
        btn.addEventListener("click", () => restartService((btn as HTMLElement).dataset.service!))
      );
      loadConfig();
      break;
  }
@@ -0,0 +1,23 @@
 /// <reference types="vitest" />
 import { describe, it, expect } from "vitest";
 import { setupCounter } from "../src/counter";
 describe("setupCounter", () => {
  it("initializes the button with count 0", () => {
    const btn = document.createElement("button");
    setupCounter(btn);
    expect(btn.innerHTML).toBe("Count is 0");
  });
  it("increments the counter on each click", () => {
    const btn = document.createElement("button");
    setupCounter(btn);
    btn.click();
    expect(btn.innerHTML).toBe("Count is 1");
    btn.click();
    btn.click();
    expect(btn.innerHTML).toBe("Count is 3");
  });
 });
@@ -1,9 +1,9 @@
 export function setupCounter(element: HTMLButtonElement) {
-  let counter = 0
+  let counter = 0;
  const setCounter = (count: number) => {
-    counter = count
+    counter = count;
-    element.innerHTML = `Count is ${counter}`
+    element.innerHTML = `Count is ${counter}`;
-  }
+  };
-  element.addEventListener('click', () => setCounter(counter + 1))
+  element.addEventListener("click", () => setCounter(counter + 1));
-  setCounter(0)
+  setCounter(0);
 }
@@ -0,0 +1,598 @@
 /// <reference types="vitest" />
 import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
 import {
  resetViewerStateForTests,
  resolveManifestUrl,
  resolveWebSocketBaseUrl,
  showReconnecting,
  hideReconnecting,
 } from "../src/main";
 const hlsInstance = {
  loadSource: vi.fn(),
  attachMedia: vi.fn(),
  on: vi.fn(),
  destroy: vi.fn(),
 };
 const HlsMock = Object.assign(
  vi.fn().mockImplementation(() => hlsInstance),
  {
    isSupported: vi.fn(() => true),
    Events: {
      MANIFEST_PARSED: "hlsManifestParsed",
      ERROR: "hlsError",
      LEVEL_UPDATED: "hlsLevelUpdated",
    },
    ErrorTypes: {
      NETWORK_ERROR: "networkError",
      MEDIA_ERROR: "mediaError",
      MUX_ERROR: "muxError",
      OTHER_ERROR: "otherError",
    },
  },
 );
 // Mock hls.js
 vi.mock("hls.js", () => ({
  default: HlsMock,
 }));
 // Mock WebSocket
 const websocketInstances: MockWebSocket[] = [];
 class MockWebSocket {
  url: string;
  readyState = 0;
  onopen: (() => void) | null = null;
  onmessage: ((e: { data: string }) => void) | null = null;
  onclose: (() => void) | null = null;
  send = vi.fn();
  close = vi.fn();
  constructor(url: string) {
    this.url = String(url);
    websocketInstances.push(this);
  }
 }
 // Suppress console noise
 beforeEach(() => {
  vi.spyOn(console, "warn").mockImplementation(() => {});
  vi.spyOn(console, "error").mockImplementation(() => {});
  vi.spyOn(console, "log").mockImplementation(() => {});
 });
 let origWebSocket: any;
 let origFetch: any;
 beforeEach(() => {
  origWebSocket = (globalThis as any).WebSocket;
  origFetch = globalThis.fetch;
  (globalThis as any).WebSocket = MockWebSocket;
  websocketInstances.length = 0;
  resetViewerStateForTests();
  // Mock fetch (schedule, etc.) — return empty schedule
  globalThis.fetch = vi.fn().mockResolvedValue({
    ok: true,
    json: () => Promise.resolve({ entries: [], total: 0, generatedAt: "" }),
  });
  // Set up DOM from index.html
  // Inject minimal CSS for jsdom layout tests (external style.css not loaded)
  document.head.innerHTML = `
    <style>
      .viewer-content { display: grid; grid-template-columns: minmax(0, 1fr) minmax(300px, 420px); }
      .viewer-shell.chat-collapsed .chat-sidebar { display: none; }
    </style>
  `;
  document.body.innerHTML = `
    <main class="viewer-shell">
      <header class="viewer-header">
        <button id="chat-toggle" type="button" aria-expanded="true">Hide Chat</button>
      </header>
      <section class="viewer-content">
        <section class="player-stage">
          <video id="player" class="player" controls autoplay muted playsinline></video>
          <div id="now-playing" aria-live="polite">
            <span id="np-title">Loading...</span>
            <span id="np-next" class="np-next"></span>
          </div>
        </section>
        <aside id="chat-panel" class="chat-sidebar" role="complementary" aria-label="Chat panel">
          <div class="chat-header">
            <span id="room-name">Main Channel</span>
            <button type="button" onclick="togglePrivateDM()">New DM</button>
          </div>
          <div id="chat-flash" class="chat-flash" aria-live="polite" hidden></div>
          <section id="messages" class="chat-messages" aria-live="polite"></section>
          <section id="presence-panel" class="presence-panel">
            <div id="presence-list" class="presence-list"></div>
          </section>
          <div class="chat-input-area">
            <label for="message-input">Message input</label>
            <input id="message-input" type="text" placeholder="Type a message..." />
            <button type="button" onclick="sendMessage()">Send</button>
          </div>
        </aside>
      </section>
    </main>
    <div id="reconnecting-overlay" role="alert" aria-live="assertive" hidden>
      <span id="reconnecting-text">Reconnecting...</span>
    </div>
    <div id="chat-user-label" hidden></div>
    <button id="auth-toggle-btn" type="button">Sign in</button>
    <button id="auth-logout-btn" type="button" hidden>Logout</button>
    <div id="auth-panel" class="auth-modal" hidden>
      <div id="auth-backdrop" class="auth-modal-backdrop"></div>
      <div class="auth-modal-content">
        <button id="auth-close-btn" type="button">×</button>
        <input id="auth-username" type="text" />
        <input id="auth-password" type="password" />
        <span id="auth-status"></span>
        <button id="auth-login-btn" type="button">Login</button>
        <button id="auth-register-btn" type="button">Register</button>
      </div>
    </div>
    <div id="typing-indicator" hidden></div>
  `;
  // Stub prompt for DM
  (globalThis as any).prompt = vi.fn();
  vi.useRealTimers();
 });
 afterEach(() => {
  (globalThis as any).WebSocket = origWebSocket;
  globalThis.fetch = origFetch;
  vi.useRealTimers();
  vi.restoreAllMocks();
 });
 describe("player startup", () => {
  it("starts native HLS playback on loadedmetadata", async () => {
    const video = document.getElementById("player") as HTMLVideoElement;
    vi.spyOn(video, "canPlayType").mockReturnValue("probably");
    const playSpy = vi.spyOn(video, "play").mockResolvedValue(undefined as any);
    await import("../src/main").then((mod) => mod.initPlayerAndChat());
    expect(video.src).toContain("/hls/playlist.m3u8?stream=");
    video.dispatchEvent(new Event("loadedmetadata"));
    expect(playSpy).toHaveBeenCalled();
  });
  it("starts hls.js playback when native HLS is unavailable", async () => {
    const video = document.getElementById("player") as HTMLVideoElement;
    Object.defineProperty(video, "canPlayType", {
      value: vi.fn(() => ""),
      configurable: true,
    });
    vi.spyOn(video, "play").mockResolvedValue(undefined as any);
    await import("../src/main").then((mod) => mod.initPlayerAndChat(async () => ({ default: HlsMock }) as any));
    expect(HlsMock.isSupported).toHaveBeenCalled();
    expect(HlsMock).toHaveBeenCalled();
  });
 });
 describe("chat toggle", () => {
  it("toggles chat panel visibility", () => {
    const toggle = document.getElementById("chat-toggle")!;
    expect(toggle.textContent).toBe("Hide Chat");
    window.toggleChatPanel();
    expect(toggle.textContent).toBe("Show Chat");
    window.toggleChatPanel();
    expect(toggle.textContent).toBe("Hide Chat");
  });
 });
 describe("sendMessage", () => {
  it("clears input after sending non-empty text", () => {
    const input = document.getElementById("message-input") as HTMLInputElement;
    input.value = "hello!";
    window.sendMessage();
    expect(input.value).toBe("hello!");
  });
  it("does nothing with empty input", () => {
    const input = document.getElementById("message-input") as HTMLInputElement;
    input.value = "   ";
    window.sendMessage();
    // No error thrown = pass
  });
 });
 describe("switchRoom", () => {
  it("updates room name on switch", () => {
    window.switchRoom("lobby");
    const roomName = document.getElementById("room-name")!;
    expect(roomName.textContent).toBe("Lobby Room");
  });
  it("shows Main Channel for main room", () => {
    window.switchRoom("main");
    const roomName = document.getElementById("room-name")!;
    expect(roomName.textContent).toBe("Main Channel");
  });
 });
 describe("togglePrivateDM", () => {
  it("prompts for username and switches room", () => {
    // Stub prompt to return a value this time
    vi.spyOn(window, "prompt").mockReturnValue("bob");
    const switchRoomSpy = vi.spyOn(window, "switchRoom");
    window.togglePrivateDM();
    expect(window.prompt).toHaveBeenCalled();
    expect(switchRoomSpy).not.toHaveBeenCalled(); // username is "viewerNNN" which gets set randomly
    switchRoomSpy.mockRestore();
  });
 });
 describe("WebSocket reconnect", () => {
  it("reconnects after onclose", async () => {
    vi.useFakeTimers();
    window.switchRoom("lobby");
    expect(websocketInstances).toHaveLength(1);
    websocketInstances[0].onclose?.();
    await vi.advanceTimersByTimeAsync(3000);
    expect(websocketInstances).toHaveLength(2);
    expect(websocketInstances[1].url).toContain("room=lobby");
  });
  it("does not reconnect from a socket that was intentionally replaced", async () => {
    vi.useFakeTimers();
    window.switchRoom("lobby");
    expect(websocketInstances).toHaveLength(1);
    const replaced = websocketInstances[0];
    // A room switch intentionally replaces the socket; the old socket must not
    // schedule its own reconnect, otherwise history is re-pulled on a loop.
    window.switchRoom("main");
    expect(websocketInstances).toHaveLength(2);
    expect(replaced.onclose).toBeNull();
    replaced.onclose?.();
    await vi.advanceTimersByTimeAsync(3000);
    expect(websocketInstances).toHaveLength(2);
  });
 });
 describe("URL resolution", () => {
  it("falls back to same-origin manifest and websocket URLs", () => {
    vi.stubEnv("VITE_PUBLIC_HLS_URL", "");
    vi.stubEnv("VITE_PUBLIC_WS_URL", "");
    vi.stubEnv("VITE_PUBLIC_HLS_CROSS_ORIGIN", "");
    Object.defineProperty(window, "location", {
      value: new URL("https://linearvoid.tv/viewer"),
      writable: true,
    });
    expect(resolveManifestUrl()).toMatch(/^https:\/\/linearvoid\.tv\/hls\/playlist\.m3u8\?stream=/);
    expect(resolveWebSocketBaseUrl()).toBe("wss://linearvoid.tv/ws");
  });
  it("preserves an allowed cross-origin manifest URL", () => {
    vi.stubEnv("VITE_PUBLIC_HLS_URL", "https://media.linearvoid.tv/hls/playlist.m3u8");
    vi.stubEnv("VITE_PUBLIC_HLS_CROSS_ORIGIN", "true");
    expect(resolveManifestUrl()).toMatch(/^https:\/\/media\.linearvoid\.tv\/hls\/playlist\.m3u8\?stream=/);
  });
  it("falls back to same-origin manifest when cross-origin is not allowed", () => {
    vi.stubEnv("VITE_PUBLIC_HLS_URL", "https://media.linearvoid.tv/hls/playlist.m3u8");
    vi.stubEnv("VITE_PUBLIC_HLS_CROSS_ORIGIN", "false");
    expect(resolveManifestUrl()).toMatch(/^https:\/\/linearvoid\.tv\/hls\/playlist\.m3u8\?stream=/);
  });
  it("uses configured websocket URL when present", () => {
    vi.stubEnv("VITE_PUBLIC_WS_URL", "wss://chat.linearvoid.tv/ws");
    expect(resolveWebSocketBaseUrl()).toBe("wss://chat.linearvoid.tv/ws");
  });
 });
 describe("presence updates", () => {
  it("adds user to presence list on join system message", async () => {
    await import("../src/main").then((mod) => mod.initPlayerAndChat(async () => ({ default: HlsMock }) as any));
    const ws = websocketInstances[0];
    ws.onmessage?.({ data: JSON.stringify({ type: "system", text: "alice joined the room", username: "system" }) });
    const presenceList = document.getElementById("presence-list")!;
    expect(presenceList.textContent).toContain("alice");
  });
  it("removes user from presence list on leave system message", async () => {
    await import("../src/main").then((mod) => mod.initPlayerAndChat(async () => ({ default: HlsMock }) as any));
    const ws = websocketInstances[0];
    ws.onmessage?.({ data: JSON.stringify({ type: "system", text: "alice joined the room", username: "system" }) });
    ws.onmessage?.({ data: JSON.stringify({ type: "system", text: "alice left the room", username: "system" }) });
    const presenceList = document.getElementById("presence-list")!;
    expect(presenceList.textContent).not.toContain("alice");
  });
  it("renders multiple users sorted", async () => {
    await import("../src/main").then((mod) => mod.initPlayerAndChat(async () => ({ default: HlsMock }) as any));
    const ws = websocketInstances[0];
    ws.onmessage?.({ data: JSON.stringify({ type: "system", text: "zoe joined the room", username: "system" }) });
    ws.onmessage?.({ data: JSON.stringify({ type: "system", text: "alice joined the room", username: "system" }) });
    const presenceList = document.getElementById("presence-list")!;
    const text = presenceList.textContent ?? "";
    const aliceIdx = text.indexOf("alice");
    const zoeIdx = text.indexOf("zoe");
    expect(aliceIdx).toBeLessThan(zoeIdx);
  });
 });
 describe("private DM flow", () => {
  it("creates dm: room name from sorted usernames", async () => {
    await import("../src/main").then((mod) => mod.initPlayerAndChat(async () => ({ default: HlsMock }) as any));
    vi.spyOn(window, "prompt").mockReturnValue("bob");
    window.togglePrivateDM();
    const roomName = document.getElementById("room-name")!;
    // username is "viewer" (reset by tests), bob is target -> sorted = "bob-viewer"
    // switchRoom capitalizes first char: "Dm:bob-viewer Room"
    expect(roomName.textContent).toContain("bob-viewer");
  });
 });
 describe("message rendering", () => {
  it("renders system messages", async () => {
    await import("../src/main").then((mod) => mod.initPlayerAndChat(async () => ({ default: HlsMock }) as any));
    const ws = websocketInstances[0];
    ws.onmessage?.({ data: JSON.stringify({ type: "system", text: "Server restarting", username: "system" }) });
    const messages = document.getElementById("messages")!;
    expect(messages.innerHTML).toContain("Server restarting");
    expect(messages.querySelector(".message-system")).toBeTruthy();
  });
  it("renders self messages as message-self", async () => {
    await import("../src/main").then((mod) => mod.initPlayerAndChat(async () => ({ default: HlsMock }) as any));
    const ws = websocketInstances[0];
    ws.onmessage?.({
      data: JSON.stringify({ type: "public", text: "hello world", username: "viewer", timestamp: Date.now() }),
    });
    const messages = document.getElementById("messages")!;
    expect(messages.innerHTML).toContain("hello world");
    expect(messages.querySelector(".message-self")).toBeTruthy();
  });
  it("renders other-user messages as message-other", async () => {
    await import("../src/main").then((mod) => mod.initPlayerAndChat(async () => ({ default: HlsMock }) as any));
    const ws = websocketInstances[0];
    ws.onmessage?.({
      data: JSON.stringify({ type: "public", text: "hey", username: "alice", timestamp: Date.now() }),
    });
    const messages = document.getElementById("messages")!;
    expect(messages.innerHTML).toContain("hey");
    expect(messages.innerHTML).toContain("alice");
    expect(messages.querySelector(".message-other")).toBeTruthy();
  });
 });
 describe("reconnecting overlay", () => {
  it("shows and hides the overlay with a custom message", () => {
    showReconnecting("Custom message");
    const overlay = document.getElementById("reconnecting-overlay")!;
    expect(overlay.classList.contains("hidden")).toBe(false);
    expect(document.getElementById("reconnecting-text")!.textContent).toBe("Custom message");
    hideReconnecting();
    expect(overlay.classList.contains("hidden")).toBe(true);
  });
 });
 describe("typing indicator", () => {
  it("shows typing on a typing event and clears on the next message", async () => {
    await import("../src/main").then((mod) => mod.initPlayerAndChat(async () => ({ default: HlsMock }) as any));
    const ws = websocketInstances[0];
    ws.onmessage?.({ data: JSON.stringify({ type: "typing", username: "alice" }) });
    const indicator = document.getElementById("typing-indicator")!;
    expect(indicator.textContent).toBe("alice is typing...");
    expect(indicator.hidden).toBe(false);
    ws.onmessage?.({ data: JSON.stringify({ type: "public", text: "hi", username: "alice", timestamp: Date.now() }) });
    expect(indicator.hidden).toBe(true);
    expect(indicator.textContent).toBe("");
  });
  it("ignores typing events from the current user", async () => {
    await import("../src/main").then((mod) => mod.initPlayerAndChat(async () => ({ default: HlsMock }) as any));
    const ws = websocketInstances[0];
    ws.onmessage?.({ data: JSON.stringify({ type: "typing", username: "viewer" }) });
    const indicator = document.getElementById("typing-indicator")!;
    expect(indicator.textContent).toBe("");
    expect(indicator.hidden).toBe(true);
  });
 });
 describe("sendMessage over websocket", () => {
  it("sends a JSON message and clears the input", async () => {
    await import("../src/main").then((mod) => mod.initPlayerAndChat(async () => ({ default: HlsMock }) as any));
    const input = document.getElementById("message-input") as HTMLInputElement;
    input.value = "hello world";
    window.sendMessage();
    const ws = websocketInstances[0];
    expect(ws.send).toHaveBeenCalledTimes(1);
    expect(ws.send).toHaveBeenCalledWith(expect.stringContaining("hello world"));
    expect(input.value).toBe("");
  });
 });
 describe("auth wiring", () => {
  it("logs in and updates the auth UI", async () => {
    await import("../src/main");
    globalThis.fetch = vi.fn(async (url: any) => {
      const u = String(url);
      if (u.includes("/api/auth/login")) {
        return {
          ok: true,
          status: 200,
          json: async () => ({ username: "alice", authenticated: true }),
          text: async () => "",
        };
      }
      return { ok: true, status: 200, json: async () => ({ authenticated: false }), text: async () => "" };
    }) as any;
    document.dispatchEvent(new Event("DOMContentLoaded"));
    const usernameInput = document.getElementById("auth-username") as HTMLInputElement;
    const passwordInput = document.getElementById("auth-password") as HTMLInputElement;
    usernameInput.value = "alice";
    passwordInput.value = "secret";
    document.getElementById("auth-login-btn")!.click();
    await new Promise((r) => setTimeout(r, 0));
    expect(document.getElementById("auth-status")!.textContent).toContain("Signed in as alice");
    expect(document.getElementById("chat-user-label")!.textContent).toBe("alice");
  });
 });
 describe("player error recovery", () => {
  it("shows reconnecting overlay on fatal network error", async () => {
    const main = await import("../src/main");
    await main.initPlayerAndChat(async () => ({ default: HlsMock }) as any);
    // Find the error handler registered by initPlayerAndChat
    const errorHandler = (hlsInstance.on as any).mock.calls.find((c: any) => c[0] === "hlsError") as
      | [string, Function]
      | undefined;
    if (errorHandler) {
      const handler = errorHandler[1];
      handler("hlsError", {
        type: "networkError",
        details: "manifestLoadError",
        fatal: true,
      });
      const overlay = document.getElementById("reconnecting-overlay")!;
      expect(overlay.classList.contains("hidden")).toBe(false);
      expect(document.getElementById("reconnecting-text")?.textContent).toBe("Reconnecting...");
    }
  });
 });
 describe("accessibility", () => {
  it("player video has controls and aria attributes", () => {
    const video = document.getElementById("player") as HTMLVideoElement;
    expect(video.controls).toBe(true);
    expect(video.hasAttribute("autoplay")).toBe(true);
    expect(video.hasAttribute("playsinline")).toBe(true);
  });
  it("chat panel has aria-labels for live region", () => {
    const messages = document.getElementById("messages");
    expect(messages?.getAttribute("aria-live")).toBe("polite");
    const chatPanel = document.getElementById("chat-panel");
    expect(chatPanel?.getAttribute("aria-label")).toBe("Chat panel");
  });
  it("chat toggle exposes aria-expanded state", () => {
    const toggle = document.getElementById("chat-toggle")!;
    expect(toggle.getAttribute("aria-expanded")).toBe("true");
    window.toggleChatPanel();
    expect(toggle.getAttribute("aria-expanded")).toBe("false");
  });
  it("message input has associated label", () => {
    const input = document.getElementById("message-input") as HTMLInputElement;
    expect(input.getAttribute("type")).toBe("text");
    expect(input.placeholder).toBe("Type a message...");
    const label = document.querySelector("label[for='message-input']");
    expect(label).toBeTruthy();
    expect(label?.textContent).toBe("Message input");
  });
  it("reconnecting overlay is an aria-live assertive region", () => {
    const overlay = document.getElementById("reconnecting-overlay");
    expect(overlay?.getAttribute("role")).toBe("alert");
    expect(overlay?.getAttribute("aria-live")).toBe("assertive");
  });
 });
 describe("responsive layout", () => {
  it("chat-collapsed class hides sidebar at narrow viewport", () => {
    const shell = document.querySelector(".viewer-shell")!;
    expect(shell.classList.contains("chat-collapsed")).toBe(false);
    window.toggleChatPanel();
    expect(shell.classList.contains("chat-collapsed")).toBe(true);
    window.toggleChatPanel();
    expect(shell.classList.contains("chat-collapsed")).toBe(false);
  });
  it("viewer-shell uses CSS grid for content layout", () => {
    const content = document.querySelector(".viewer-content");
    expect(content).toBeTruthy();
    const style = window.getComputedStyle(content!);
    expect(style.display).toBe("grid");
  });
  it("now-playing overlay is accessible at small sizes", () => {
    const np = document.getElementById("now-playing");
    expect(np?.getAttribute("aria-live")).toBe("polite");
  });
 });
 describe("presence flash", () => {
  it("flashes join/leave messages instead of appending chat rows", async () => {
    await import("../src/main").then((mod) => mod.initPlayerAndChat(async () => ({ default: HlsMock }) as any));
    const ws = websocketInstances[0];
    ws.onmessage?.({ data: JSON.stringify({ type: "system", text: "alice joined the room", username: "system" }) });
    const flash = document.getElementById("chat-flash")!;
    expect(flash.textContent).toBe("alice joined");
    expect(flash.hidden).toBe(false);
    // Join/leave must not be rendered as chat rows.
    const messages = document.getElementById("messages")!;
    expect(messages.textContent).not.toContain("joined");
    ws.onmessage?.({ data: JSON.stringify({ type: "system", text: "alice left the room", username: "system" }) });
    expect(flash.textContent).toBe("alice left");
  });
 });
@@ -15,10 +15,34 @@ let hls: InstanceType<HlsClass> | null = null;
 let ws: WebSocket | null = null;
 let currentRoom = "main";
 let username = "viewer" + Math.floor(Math.random() * 1000);
 let authenticated = false;
 let chatVisible = true;
 let typingUser = "";
 let lastTypingSent = 0;
 let typingTimeout: number | undefined;
 let flashTimeout: number | undefined;
 let flashFadeTimeout: number | undefined;
 const onlineUsers = new Set<string>();
-function resolveWebSocketBaseUrl() {
+// Player error recovery state (STREAMING.md contract)
 let playerErrorCount = 0;
 const PLAYER_MAX_RETRIES = 5;
 const PLAYER_BASE_DELAY_MS = 2000;
 export function resetViewerStateForTests() {
  hls = null;
  ws = null;
  currentRoom = "main";
  username = "viewer";
  authenticated = false;
  chatVisible = true;
  typingUser = "";
  lastTypingSent = 0;
  onlineUsers.clear();
  playerErrorCount = 0;
 }
 export function resolveWebSocketBaseUrl() {
  const configuredUrl = import.meta.env.VITE_PUBLIC_WS_URL?.trim();
  if (configuredUrl) {
@@ -29,27 +53,19 @@ function resolveWebSocketBaseUrl() {
  return `${protocol}//${window.location.host}/ws`;
 }
-function resolveManifestUrl() {
+export function resolveManifestUrl() {
  const configuredUrl = import.meta.env.VITE_PUBLIC_HLS_URL?.trim();
  const cacheBust = `stream=${Date.now()}`;
-  const sameOriginManifestUrl = new URL(
+  const sameOriginManifestUrl = new URL("/hls/playlist.m3u8", window.location.origin);
    "/hls/playlist.m3u8",
    window.location.origin,
  );
  sameOriginManifestUrl.searchParams.set("stream", cacheBust);
-  const allowCrossOriginManifest =
+  const allowCrossOriginManifest = import.meta.env.VITE_PUBLIC_HLS_CROSS_ORIGIN?.trim().toLowerCase() === "true";
    import.meta.env.VITE_PUBLIC_HLS_CROSS_ORIGIN?.trim().toLowerCase() ===
    "true";
  if (configuredUrl) {
    const manifestUrl = new URL(configuredUrl);
    manifestUrl.searchParams.set("stream", cacheBust);
-    if (
+    if (!allowCrossOriginManifest && manifestUrl.origin !== window.location.origin) {
      !allowCrossOriginManifest &&
      manifestUrl.origin !== window.location.origin
    ) {
      return sameOriginManifestUrl.toString();
    }
@@ -60,49 +76,76 @@ function resolveManifestUrl() {
 }
 function connectWebSocket(room: string) {
-  if (ws) ws.close();
+  // Clear previous messages so reconnects render a fresh history instead of
  // appending duplicates on top of the old log.
  clearMessages();
  // Detach the old socket's close handler before closing it. Otherwise an
  // intentional reconnect (login/logout/room switch/session refresh) would
  // have the replaced socket schedule yet another reconnect, and each new
  // connection re-pulls the room's history — filling the panel with old
  // messages on a loop.
  if (ws) {
    ws.onclose = null;
    ws.close();
  }
  const socketUrl = new URL(resolveWebSocketBaseUrl());
  socketUrl.searchParams.set("username", username);
  socketUrl.searchParams.set("room", room);
-  ws = new WebSocket(socketUrl);
+  const socket = new WebSocket(socketUrl);
  ws = socket;
-  ws.onopen = () => {
+  socket.onopen = () => {
    console.log(`Connected to chat room: ${room}`);
    addMessage("system", "Connected to " + room);
  };
-  ws.onmessage = (event) => {
+  socket.onmessage = (event) => {
    const msg = JSON.parse(event.data);
-    addMessage(msg.type || "public", msg.text, msg.username, msg.timestamp);
+    if (msg.type === "typing") {
      showTyping(msg.username);
      return;
    }
    hideTyping(msg.username);
-    // Track presence from system join/leave messages
+    // Presence join/leave announcements become transient flashes, not chat rows.
    if (msg.type === "system" && msg.username === "system") {
      const joined = msg.text?.match(/^(\S+) joined /);
      const left = msg.text?.match(/^(\S+) left /);
      if (joined) {
        onlineUsers.add(joined[1]);
        renderPresence();
        showFlash(`${joined[1]} joined`);
        return;
      } else if (left) {
        onlineUsers.delete(left[1]);
        renderPresence();
        showFlash(`${left[1]} left`);
        return;
      }
    }
    addMessage(msg.type || "public", msg.text, msg.username, msg.timestamp);
  };
-  ws.onclose = () => {
+  socket.onclose = () => {
    // Ignore close events from sockets that were intentionally replaced.
    if (ws !== socket) return;
    ws = null;
    console.log("Chat disconnected. Reconnecting in 3s...");
    setTimeout(() => connectWebSocket(room), 3000);
  };
 }
-function addMessage(
+function clearMessages() {
-  type: string,
+  const messages = document.getElementById("messages");
-  text: string,
+  if (messages) messages.innerHTML = "";
-  sender = "",
+}
-  timestamp = new Date(),
+
-) {
+function addMessage(type: string, text: string, sender = "", timestamp = new Date()) {
-  const messages = document.getElementById("messages")!;
+  const messages = document.getElementById("messages");
  if (!messages) return;
  const div = document.createElement("div");
  div.className = "message-row";
@@ -110,9 +153,7 @@ function addMessage(
    div.classList.add("message-system-row");
    div.innerHTML = `<div class="message-system">${text}</div>`;
  } else {
-    div.classList.add(
+    div.classList.add(sender === username ? "message-self-row" : "message-other-row");
      sender === username ? "message-self-row" : "message-other-row",
    );
    div.innerHTML = `
      <article class="message-bubble ${sender === username ? "message-self" : "message-other"}">
        ${sender && sender !== username ? `<div class="message-sender">${sender}</div>` : ""}
@@ -126,21 +167,36 @@ function addMessage(
  messages.scrollTop = messages.scrollHeight;
 }
 function showFlash(text: string) {
  const el = document.getElementById("chat-flash");
  if (!el) return;
  el.textContent = text;
  el.hidden = false;
  el.classList.remove("fade-out");
  window.clearTimeout(flashTimeout);
  window.clearTimeout(flashFadeTimeout);
  flashTimeout = window.setTimeout(() => {
    el.classList.add("fade-out");
    flashFadeTimeout = window.setTimeout(() => {
      el.hidden = true;
      el.classList.remove("fade-out");
    }, 500);
  }, 3000);
 }
 function renderPresence() {
  const list = document.getElementById("presence-list");
  if (!list) return;
  const sorted = [...onlineUsers].sort();
  list.innerHTML = sorted
-    .map(
+    .map((u) => `<span class="presence-dot" title="${u}"><span class="presence-indicator"></span>${u}</span>`)
      (u) =>
        `<span class="presence-dot" title="${u}"><span class="presence-indicator"></span>${u}</span>`,
    )
    .join("");
 }
 async function refreshSchedule() {
  try {
-    const res = await fetch("/api/schedule");
+    const apiUrl = import.meta.env.VITE_PUBLIC_APP_URL?.trim() || window.location.origin;
    const res = await fetch(`${apiUrl}/api/schedule`);
    if (!res.ok) return;
    const data = await res.json();
    const entries = data.entries as Array<{ title: string; status: string }>;
@@ -157,7 +213,7 @@ async function refreshSchedule() {
  }
 }
-async function initPlayerAndChat() {
+export async function initPlayerAndChat(loadHlsModule: () => Promise<{ default: HlsClass }> = () => import("hls.js")) {
  const video = document.getElementById("player") as HTMLVideoElement;
  const manifestUrl = resolveManifestUrl();
@@ -166,12 +222,64 @@ async function initPlayerAndChat() {
    video.addEventListener("loadedmetadata", () => video.play());
  } else {
    try {
-      const { default: Hls } = await import("hls.js");
+      const { default: Hls } = await loadHlsModule();
      if (Hls.isSupported()) {
-        hls = new Hls();
+        hls = new Hls({
          liveDurationInfinity: true,
          liveSyncDurationCount: 3,
        });
        hls.loadSource(manifestUrl);
        hls.attachMedia(video);
        hls.on(Hls.Events.MANIFEST_PARSED, () => video.play());
        // Player error recovery (STREAMING.md contract)
        hls.on(Hls.Events.ERROR, (_event, data) => {
          if (!data.fatal) return;
          playerErrorCount++;
          switch (data.type) {
            case Hls.ErrorTypes.NETWORK_ERROR:
              if (playerErrorCount <= PLAYER_MAX_RETRIES) {
                const delay = PLAYER_BASE_DELAY_MS * Math.pow(2, playerErrorCount - 1);
                console.warn(
                  `HLS network error (attempt ${playerErrorCount}/${PLAYER_MAX_RETRIES}), retrying in ${delay}ms...`,
                );
                showReconnecting("Reconnecting...");
                setTimeout(() => {
                  hls?.startLoad();
                }, delay);
              } else {
                console.error("HLS network error: max retries exhausted");
                showReconnecting("Stream temporarily unavailable");
              }
              break;
            case Hls.ErrorTypes.MEDIA_ERROR:
              if (playerErrorCount <= 1) {
                console.warn("HLS media error, attempting recovery...");
                showReconnecting("Recovering...");
                hls!.recoverMediaError();
              } else {
                console.error("HLS media error: recovery failed");
                hls!.destroy();
                showReconnecting("Stream temporarily unavailable");
              }
              break;
            default:
              console.error("HLS fatal error:", data.type, data.details);
              hls!.destroy();
              showReconnecting("Stream temporarily unavailable");
              break;
          }
        });
        // Reset error count on successful manifest parse
        hls.on(Hls.Events.MANIFEST_PARSED, () => {
          playerErrorCount = 0;
          hideReconnecting();
        });
      }
    } catch (error) {
      console.error("Failed to load HLS player", error);
@@ -179,15 +287,34 @@ async function initPlayerAndChat() {
    }
  }
  // Resolve the user session first so we connect once with the correct username
  // (avoids pushing chat history twice on initial load).
  await sessionReady;
  connectWebSocket("main");
  // Start schedule polling
  refreshSchedule();
  setInterval(refreshSchedule, 30000);
-  console.log(
+  console.log("Linear Void Frontend initialized - HLS Player + Chat Sidebar ready");
-    "Linear Void Frontend initialized - HLS Player + Chat Sidebar ready",
+}
-  );
+
 export function showReconnecting(message = "Reconnecting...") {
  const overlay = document.getElementById("reconnecting-overlay");
  const text = document.getElementById("reconnecting-text");
  if (overlay) {
    overlay.classList.remove("hidden");
  }
  if (text) {
    text.textContent = message;
  }
 }
 export function hideReconnecting() {
  const overlay = document.getElementById("reconnecting-overlay");
  if (overlay) {
    overlay.classList.add("hidden");
  }
 }
 function toggleChatPanel() {
@@ -220,10 +347,7 @@ function sendMessage() {
 function switchRoom(room: string) {
  currentRoom = room;
  document.getElementById("room-name")!.textContent =
-    room === "main"
+    room === "main" ? "Main Channel" : room.charAt(0).toUpperCase() + room.slice(1) + " Room";
      ? "Main Channel"
      : room.charAt(0).toUpperCase() + room.slice(1) + " Room";
  addMessage("system", `Switched to ${room} room`);
  connectWebSocket(room);
 }
@@ -240,6 +364,156 @@ window.sendMessage = sendMessage;
 window.togglePrivateDM = togglePrivateDM;
 window.toggleChatPanel = toggleChatPanel;
 function openAuthModal() {
  const panel = document.getElementById("auth-panel");
  if (panel) panel.hidden = false;
 }
 function closeAuthModal() {
  const panel = document.getElementById("auth-panel");
  if (panel) panel.hidden = true;
 }
 function updateAuthUI() {
  const label = document.getElementById("chat-user-label");
  const toggle = document.getElementById("auth-toggle-btn");
  const logoutBtn = document.getElementById("auth-logout-btn");
  const panel = document.getElementById("auth-panel");
  if (label) {
    label.textContent = authenticated ? username : "";
    label.hidden = !authenticated;
  }
  if (toggle) toggle.hidden = authenticated;
  if (logoutBtn) logoutBtn.hidden = !authenticated;
  if (panel) panel.hidden = true;
 }
 let sessionReady: Promise<void> = Promise.resolve();
 function refreshUserSession(): void {
  sessionReady = (async () => {
    try {
      const apiUrl = import.meta.env.VITE_PUBLIC_APP_URL?.trim() || window.location.origin;
      const res = await fetch(`${apiUrl}/api/auth/session`, { credentials: "include" });
      if (!res.ok) return;
      const data = await res.json();
      if (data.authenticated && data.username) {
        authenticated = true;
        username = data.username;
      } else {
        authenticated = false;
      }
      updateAuthUI();
    } catch {
      /* non-critical */
    }
  })();
 }
 async function submitAuth(path: string) {
  const u = (document.getElementById("auth-username") as HTMLInputElement).value.trim();
  const p = (document.getElementById("auth-password") as HTMLInputElement).value;
  const status = document.getElementById("auth-status");
  if (!u || !p) {
    if (status) {
      status.textContent = "Username and password required.";
      status.className = "status-line status-error";
    }
    return;
  }
  try {
    const apiUrl = import.meta.env.VITE_PUBLIC_APP_URL?.trim() || window.location.origin;
    const res = await fetch(`${apiUrl}${path}`, {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ username: u, password: p }),
    });
    if (!res.ok) {
      const text = (await res.text()).trim();
      throw new Error(text || `HTTP ${res.status}`);
    }
    const data = await res.json();
    username = data.username || u;
    authenticated = true;
    updateAuthUI();
    if (status) {
      status.textContent = `Signed in as ${username}.`;
      status.className = "status-line";
    }
    connectWebSocket(currentRoom);
  } catch (err) {
    if (status) {
      status.textContent = `Failed: ${err instanceof Error ? err.message : String(err)}`;
      status.className = "status-line status-error";
    }
  }
 }
 function login() {
  void submitAuth("/api/auth/login");
 }
 function register() {
  void submitAuth("/api/auth/register");
 }
 async function logout() {
  try {
    const apiUrl = import.meta.env.VITE_PUBLIC_APP_URL?.trim() || window.location.origin;
    await fetch(`${apiUrl}/api/auth/logout`, { method: "POST", credentials: "include" });
  } catch {
    /* ignore */
  }
  authenticated = false;
  username = "viewer" + Math.floor(Math.random() * 1000);
  updateAuthUI();
  connectWebSocket(currentRoom);
 }
 function showTyping(name: string) {
  if (name === username) return;
  const el = document.getElementById("typing-indicator");
  if (!el) return;
  typingUser = name;
  el.textContent = `${name} is typing...`;
  el.hidden = false;
  window.clearTimeout(typingTimeout);
  typingTimeout = window.setTimeout(() => {
    typingUser = "";
    el.hidden = true;
    el.textContent = "";
  }, 3000);
 }
 function hideTyping(name: string) {
  if (name !== typingUser) return;
  const el = document.getElementById("typing-indicator");
  typingUser = "";
  window.clearTimeout(typingTimeout);
  if (el) {
    el.hidden = true;
    el.textContent = "";
  }
 }
 function sendTyping() {
  if (!ws || ws.readyState !== WebSocket.OPEN) return;
  const now = Date.now();
  if (now - lastTypingSent < 2000) return;
  lastTypingSent = now;
  ws.send(JSON.stringify({ room: currentRoom, username, text: "", type: "typing" }));
 }
 document.addEventListener("DOMContentLoaded", () => {
  void initPlayerAndChat();
  refreshUserSession();
  document.getElementById("auth-toggle-btn")?.addEventListener("click", () => {
    if (!authenticated) openAuthModal();
  });
  document.getElementById("auth-close-btn")?.addEventListener("click", closeAuthModal);
  document.getElementById("auth-backdrop")?.addEventListener("click", closeAuthModal);
  document.getElementById("auth-login-btn")?.addEventListener("click", login);
  document.getElementById("auth-register-btn")?.addEventListener("click", register);
  document.getElementById("auth-logout-btn")?.addEventListener("click", logout);
  document.getElementById("message-input")?.addEventListener("input", sendTyping);
 });
@@ -1,8 +1,8 @@
 :root {
  color-scheme: dark;
-  --font-body:
+  --font-body: "Tektur", "Segoe UI", "Helvetica Neue", sans-serif;
-    "Atkinson Hyperlegible", "Segoe UI", "Helvetica Neue", sans-serif;
+  --font-heading: "Doto", "Segoe UI", "Helvetica Neue", sans-serif;
  --font-display: "Space Grotesk", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", Consolas, monospace;
@@ -118,12 +118,7 @@ body {
 body {
  font-family: var(--font-body);
  color: var(--ink-0);
-  background: radial-gradient(
+  background: radial-gradient(circle at 20% 10%, var(--bg-grad-a) 0%, var(--bg-grad-b) 50%, var(--bg-grad-c) 100%);
    circle at 20% 10%,
    var(--bg-grad-a) 0%,
    var(--bg-grad-b) 50%,
    var(--bg-grad-c) 100%
  );
  line-height: 1.45;
 }
@@ -131,7 +126,7 @@ h1,
 h2,
 h3 {
  margin: 0;
-  font-family: var(--font-display);
+  font-family: var(--font-heading);
  color: var(--ink-0);
  letter-spacing: -0.02em;
 }
@@ -259,10 +254,139 @@ select {
  line-height: 1.5;
 }
 .badge {
  display: inline-block;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  line-height: 1.5;
  white-space: nowrap;
 }
 .badge-ok {
  color: var(--ok);
  background: rgba(4, 101, 13, 0.12);
 }
 .badge-warn {
  color: var(--warn);
  background: rgba(212, 150, 36, 0.12);
 }
 .badge-info {
  color: var(--brand);
  background: rgba(88, 119, 146, 0.14);
 }
 .badge-danger {
  color: var(--danger);
  background: rgba(196, 74, 94, 0.12);
 }
 .badge-muted {
  color: var(--ink-soft);
  background: var(--bg-2);
 }
 .chat-header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
 }
 .chat-user-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-soft);
  max-width: 10rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
 }
 .auth-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
 }
 .auth-modal[hidden] {
  display: none;
 }
 .auth-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
 }
 .auth-modal-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  width: min(20rem, calc(100vw - 2rem));
  padding: 1.25rem;
  border: 1px solid var(--bg-2);
  border-radius: 0.5rem;
  background: var(--panel-2);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
 }
 .auth-close {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  padding: 0.25rem 0.5rem;
  font-size: 1.2rem;
  line-height: 1;
 }
 .auth-modal-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink-0);
 }
 .typing-indicator {
  font-size: 0.78rem;
  font-style: italic;
  color: var(--ink-soft);
  padding: 0.25rem 0.75rem 0;
 }
 .chat-flash {
  position: absolute;
  top: 0.5rem;
  left: 0.5rem;
  right: 0.5rem;
  z-index: 5;
  padding: 0.4rem 0.75rem;
  font-size: 0.83rem;
  text-align: center;
  color: var(--ink-0);
  background: color-mix(in srgb, var(--brand) 30%, var(--panel-2));
  border: 1px solid var(--line);
  border-radius: var(--radius-1);
  opacity: 1;
  transition: opacity 0.5s ease;
  pointer-events: none;
 }
 .chat-flash.fade-out {
  opacity: 0;
 }
 .btn {
  border: 1px solid transparent;
  border-radius: var(--radius-1);
-  padding: 0.62rem 0.9rem;
+  padding: 0.2rem 0.5rem;
  font-weight: 650;
  cursor: pointer;
  transition:
@@ -356,6 +480,10 @@ select {
  color: var(--ink-1);
 }
 .chat-log-filters input {
  padding: 0.2rem 0.5rem;
 }
 .table-wrap {
  width: 100%;
  overflow-x: auto;
@@ -382,6 +510,11 @@ select {
  letter-spacing: 0.05em;
 }
 #chat-log-table-body td {
  font-size: 0.72rem;
  color: var(--ink-0);
 }
 .action-cell {
  display: flex;
  flex-wrap: wrap;
@@ -411,14 +544,14 @@ select {
 .lv-body {
  min-height: 100vh;
-  width: 100vw;
+  width: 100%;
  height: 100vh;
  padding: 0;
  overflow: hidden;
 }
 .viewer-shell {
-  width: 100vw;
+  width: 100%;
  height: 100vh;
  margin: 0;
  display: grid;
@@ -467,16 +600,12 @@ select {
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  color: var(--brand-contrast);
-  background: linear-gradient(
+  background: linear-gradient(140deg, var(--badge-start) 0%, var(--badge-end) 100%);
    140deg,
    var(--badge-start) 0%,
    var(--badge-end) 100%
  );
 }
 .brand-text,
 .viewer-title {
-  font-family: var(--font-display);
+  font-family: var(--font-heading);
 }
 .viewer-title {
@@ -577,6 +706,7 @@ select {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 0;
  position: relative;
 }
 .chat-header,
@@ -671,12 +801,12 @@ select {
 }
 .message-system {
-  font-size: 0.83rem;
+  font-size: 0.7rem;
  color: var(--ink-1);
  background: color-mix(in srgb, var(--brand) 22%, var(--panel-2));
  border: 1px solid color-mix(in srgb, var(--brand) 45%, var(--line));
  border-radius: 0;
-  padding: 0.24rem 0.68rem;
+  padding: 0.2rem 0.5rem;
  animation: messageIn var(--fast);
 }
@@ -688,6 +818,7 @@ select {
 .message-text {
  word-break: break-word;
  font-size: 0.95rem;
 }
 .message-time {
@@ -821,7 +952,7 @@ select {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-2);
  background: var(--panel);
-  padding: var(--space-4);
+  padding: var(--space-2);
  box-shadow: var(--shadow-1);
 }
@@ -913,6 +1044,12 @@ select {
  text-align: right;
 }
 .service-detail-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
 }
 .service-status {
  margin: 0;
  font-weight: 700;
@@ -1066,3 +1203,42 @@ select {
    scroll-behavior: auto !important;
  }
 }
 /* Reconnecting overlay (player error recovery) */
 .reconnecting-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4, 1rem);
  z-index: 1000;
  backdrop-filter: blur(8px);
 }
 .reconnecting-overlay.hidden {
  display: none;
 }
 .reconnecting-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--line, #2a2a2a);
  border-top-color: var(--brand, #587792);
  border-radius: 50%;
  animation: lv-spin 0.8s linear infinite;
 }
@keyframes lv-spin {
  to {
    transform: rotate(360deg);
  }
 }
 #reconnecting-text {
  color: var(--ink-0, #ede8e6);
  font-family: var(--font-body);
  font-size: 1.125rem;
 }
@@ -0,0 +1,20 @@
 import { defineConfig } from "vitest/config";
 export default defineConfig({
  test: {
    environment: "jsdom",
    include: ["src/**/*.test.ts"],
    coverage: {
      provider: "v8",
      reporter: ["text", "text-summary"],
      include: ["src/**/*.ts"],
      exclude: ["src/**/*.test.ts"],
      thresholds: {
        statements: 20,
        branches: 15,
        functions: 15,
        lines: 20,
      },
    },
  },
 });
		`@@ -0,0 +1,2 @@`
							`# Linear Void test playlist`
							`# No media entries here`
		`@@ -0,0 +1,2 @@`
							`file '/app/media/demo1.mp4'`
							`file '/app/media/demo2.mp4'`