Shared TabChipStrip replaces the plain Rows in libraries/downloads/live
TV app bars (and live TV's hand-rolled scroll wrapper); chips center
themselves on focus so d-pad reaches off-screen tabs.
- 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
- Skip redundant notifyListeners in HiddenLibrariesProvider init when
set is empty (empty→empty is a no-op for consumers)
- Track last-seen hidden keys in DiscoverScreen to avoid reloading
content when the listener fires without an actual change
- Track previous online server set in MultiServerProvider; only re-check
DVR availability when a new server comes online
- Remove dead content-loading pipeline from libraries_screen (sorts,
pagination, filters, items) that was never rendered
- Move /media/providers fetch into PlexClient.create() init, replacing
lazy EPG cache and providing libraries including shared items
Replace duplicated focusable action button pattern across 8 screens with
a shared FocusableActionBar widget that handles focus nodes, D-pad
navigation, back key, and focus decoration automatically.
edde746