- Replace hardcoded 4-tab system with data-driven visible tab list
- Shared libraries show only Browse + Playlists tabs
- Fix dpad navigation for shared libraries (no hidden tab targets)
- Switch to TickerProviderStateMixin to support tab controller recreation
- Navigate to library screen when tapping shared library sections
- Persist tab selection by name instead of index
Extract EpisodeCard to its own widget file. MediaDetailScreen now handles
isSeason by showing episodes directly, with proper watch state tracking,
deletion handling, and D-pad focus navigation. Hide empty overview sections.
edde746