- Add .channel to BaseItemKind.supportedCases for proper filtering
- Implement channel API routing in ItemLibraryViewModel
- Add comprehensive debug logging to track API calls and filtering
- Support channels in MediaViewModel library views
- Fix channel items not appearing in media libraries
This enables Xtream plugin channels (VOD/Series) to display correctly
in jellypig tvOS. Channels now use proper /Channels API endpoints
instead of falling back to regular /Items API.
Related to ongoing fix for Xtream content media display.