Refactor frontend: Enhance chat UI and player initialization

- Updated main.ts to streamline player and chat initialization, removing Alpine.js dependency.
- Improved message rendering with new CSS classes for better styling and layout.
- Added a function to simulate "now playing" titles at regular intervals.
- Revamped style.css with a new design system using CSS variables for better maintainability.
- Removed tailwind.config.js as Tailwind CSS is no longer used.

CHANGELOG.md

@@ -11,17 +11,21 @@
 - Added `/api/admin/media/{id}` GET/PUT/DELETE handlers for media metadata retrieval, updates, and file+record deletion.
 - Extended admin schedule and dashboard data endpoints with media duration totals, runtime strings, and media counts.
 - Added admin UI runtime display for schedule/dashboard plus media library edit/delete actions.
+- Added a dedicated plain TypeScript admin module for tab navigation, media CRUD actions, schedule/system analytics refresh, and moderation workflows without Alpine dependencies.
 
 ### Changed
 
 - Revised ADR-006 to reflect current implemented storage: PostgreSQL is the compose default and deployed primary backend, with SQLite retained as optional fallback.
 - Updated chat runtime image to include ffmpeg/ffprobe for media duration probing on upload.
+- 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.
 
 ### Fixed
 
 - Started Admin UI Media Library backend implementation by adding the `Media` GORM model and AutoMigrate integration in chat startup.
 - Implemented media upload duration probing with ffprobe and persisted media metadata to the database alongside filesystem storage.
 - Updated media listing to read from the media table and return duration metadata with HH:MM:SS runtime formatting.
+- Removed Tailwind and Alpine runtime/build dependencies from the frontend package configuration and eliminated Tailwind directives/warnings during production build.
 
 ## [1.0.3] - 2026-08-03