feat: enhance media management with CRUD operations and runtime tracking in admin UI

CHANGELOG.md

@@ -2,6 +2,27 @@
 
 <!-- markdownlint-disable MD024 -->
 
+## Unreleased
+
+### Added
+
+- Documentation for Admin UI Media Library (arc42 updates, refined TODO, media DB model decisions per ADR-006).
+- Started implementation of full Media CRUD + video duration extraction using ffprobe (Media Library - Full CRUD section).
+- 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.
+
+### 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.
+
+### 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.
+
 ## [1.0.3] - 2026-08-03
 
 ### Added