fix(ci): exclude bin/ from root analyzer and clean remaining warnings

The frontend CI job ran `flutter analyze` from the repo root, which also
analyzed the bin/ server package without its dependencies resolved
(shelf_router, sqlite3, bcrypt, test), producing hundreds of
uri_does_not_exist errors. bin/ is a standalone package covered by the
backend job, so it is now excluded from root analysis.

Also:
- Remove all unused fields/variables flagged as analyzer warnings
  (api_client, cache_service, player_screen, subtitle_service,
  live_tv_tab, mobile screens)
- Run `flutter analyze --no-fatal-infos` in CI: pre-existing deprecation
  infos (withOpacity, dart:html) stay non-fatal while errors and warnings
  still fail the build

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

lib/features/iptv/screens/player_screen.dart

@@ -54,14 +54,10 @@ class _PlayerScreenState extends ConsumerState<PlayerScreen> {
   bool _isInitialized = false;
   bool _isLoading = true;
   StreamSubscription? _messageSubscription;
-  final String _aspectRatio = 'contain';
   bool _isSeeking = false;
   late final String _viewIdPrefix =
       DateTime.now().millisecondsSinceEpoch.toString();
   String _viewId = 'iptv-player';
-  String? _currentStreamUrl;
-  String _statusMessage = 'Loading...';
-  String? _errorMessage;
   bool _isMuted = false;
   bool _ignoreStatusUpdates = false;
 
@@ -104,7 +100,6 @@ class _PlayerScreenState extends ConsumerState<PlayerScreen> {
   }) async {
     setState(() {
       _isLoading = true;
-      _statusMessage = 'Loading...';
     });
 
     try {
@@ -164,8 +159,6 @@ class _PlayerScreenState extends ConsumerState<PlayerScreen> {
         service.isPlaybackLoading = false;
       });
 
-      _currentStreamUrl = streamUrl;
-
       final encodedUrl = Uri.encodeComponent(streamUrl);
       // Force player choice based on stream type:
       // - Live TV: Player Lite (simple TS playback with mpegts.js)
@@ -222,9 +215,9 @@ class _PlayerScreenState extends ConsumerState<PlayerScreen> {
         });
       }
     } catch (e) {
+      print('[PlayerScreen] Failed to load stream: $e');
       if (mounted) {
         setState(() {
-          _errorMessage = 'Failed to load stream: $e';
           _isLoading = false;
         });
       }

lib/features/iptv/services/subtitle_service.dart

@@ -42,9 +42,6 @@ class SubtitleEntry {
 
 /// Service for handling subtitles
 class SubtitleService {
-  static const _srtPattern =
-      r'(\d+)\n(\d{2}):(\d{2}):(\d{2}),(\d{3}) --> (\d{2}):(\d{2}):(\d{2}),(\d{3})\n([\s\S]*?)(?=\n\n|\Z)';
-
   /// Parse SRT subtitle content
   static List<SubtitleEntry> parseSrt(String content) {
     final entries = <SubtitleEntry>[];

lib/features/iptv/widgets/live_tv_tab.dart

@@ -26,7 +26,6 @@ class LiveTVTab extends ConsumerStatefulWidget {
 class _LiveTVTabState extends ConsumerState<LiveTVTab>
     with AutomaticKeepAliveClientMixin {
   String? _selectedCategory;
-  final bool _isGridView = true;
   final TextEditingController _searchController = TextEditingController();
   bool _showFavoritesOnly = false;
   String _searchQuery = '';