fix(frontend): prefix auth API requests with VITE_PUBLIC_APP_URL for cross-origin Workers hosting

docs/architecture/README.md

@@ -534,7 +534,7 @@ ffmpeg -i input.mov \
 A thread-safe, JSON-persisted runtime config store lives in `backend/chat/src/config/runtime.go` and is shared with the playout service via the playlist volume (`/app/playlist/config.json`).
 
 - Editable via `GET/PUT /api/admin/config` from the admin UI.
-- Fields: `hlsSegmentDuration` (2–15s, default 6), `hlsWindowSize` (3–100, default 24), `matomoUrl`, `matomoSiteId`.
+- Fields: `hlsSegmentDuration` (2–15s, default 2), `hlsWindowSize` (3–100, default 12), `matomoUrl`, `matomoSiteId`.
 - Playout reads the same file (`loadSharedHLSConfig`) as an env fallback for HLS segment duration/window.
 - Typed setters validate values; invalid input is rejected with `400`.