- New: sidebar_widget.py — iTunes-like sidebar with library/playlist/nav sections, GTK palette
- New: player_header.py — global player header (cover, now playing, controls) above splitter
- New: playlist_manager.py — playlist CRUD with JSON persistence
- Refactor: moved QMediaPlayer from LibraryTab to MainWindow for clean architecture
- Refactor: LibraryTab — removed all player code, added play_requested signal
- Feat: album grid (IconMode) — grouped by album name, rounded covers 8px, Spotify-like
- Feat: NumericTableItem — numeric sort for track # column (1,2,3...10,11 not 1,10,2)
- Feat: track_num animation fixed — finds row by path, not index (no freeze on sort)
- Feat: album_artist tag extracted and stored in TrackInfo
- Feat: state persistence — view_mode/filtered_album saved to config.ini on close
- Feat: Ctrl+B toggle sidebar
- Fix: sidebar splitter handle colour from GTK palette
199fb43f04