release version 1.0.6

CHANGELOG.md

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 <!-- markdownlint-disable MD024 -->
 
-## [1.0.5] - 2026-08-05
+## [1.0.6] - 2026-08-05
 
 ### Added
 
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 - Rebuilt viewer, admin, and admin-login pages around custom semantic class structures with accessibility-focused landmarks, tab semantics, and keyboard-focus behavior.
 - Replaced legacy and Tailwind-based stylesheet rules with a custom design-token CSS system covering responsive layouts, forms, tables, and reduced-motion behavior.
 - Switched frontend theme to dark-mode-first token defaults with light-scheme override.
+- Applied new color palette (`#32292f` dark, `#b4c4ae` light, `#587792` brand, `#2ebfa5` focus, `#04650d` ok) across all 22 CSS custom properties in dark and light themes.
+- Replaced hardcoded admin sidebar and tab-trigger colors with CSS custom properties.
+- Optimized CI pipeline: removed duplicate `docker compose build --no-cache` from test job, removed broken playlist validation step, fixed Go module cache path, added Docker Buildx registry cache to docker/release jobs.
 - Bumped chat healthcheck `start_period` from 10s to 30s in `docker-compose.prod.yml`.
 - CD workflow now verifies nginx (port 8080) + chat (3000) + playout (8081); dumps container logs for all failing services.
 - Updated Prometheus scrape targets and Grafana dashboard queries to use live chat metrics.
 
 ### Fixed
 
-- Go module cache in CI now correctly references `backend/playout/go.sum` and `backend/chat/go.sum`.
+- Go module cache in CI now correctly references only `backend/chat/go.sum` (playout go.sum did not exist); added `go mod download` step to seed cache.
+- Removed broken playlist validation step (`go run src/playlist.go` without go.mod) from CI test job.
+- Converted nginx CI build from custom shell `docker buildx` to `docker/build-push-action@v5` for cache consistency.
 - Enforced 2GB upload ceiling plus server-side media file type/size validation for admin uploads.
 - Increased nginx `client_max_body_size` to allow resumable admin upload chunks without 413 errors.
 - Removed unused `data-admin-*` Vite env var attributes from admin HTML template.