Phase 3: Architecture refactor - consolidate folders and extract patterns

- Consolidate lib/mobile/features/iptv → lib/features/iptv
  * Move all IPTV screens, models, services, widgets to unified location
  * Update imports in main.dart and affected files
  * Remove old mobile/features/iptv directory

- Create lib/core/patterns/ for reusable implementations
  * HiveServiceBase: Template for Hive-based persistent storage
  * VideoPlayerWrapper: Abstraction for video player selection
  * StreamResolverPattern: IPTV stream resolution and validation

- Router already simplified (no kIsWeb checks, Android-only)

All changes maintain Android-only architecture and improve maintainability.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

lib/main.dart

@@ -4,21 +4,27 @@ import 'package:hive_flutter/hive_flutter.dart';
 import 'package:media_kit/media_kit.dart';
 import 'core/theme/app_theme.dart';
 import 'core/providers/theme_provider.dart';
-import 'mobile/features/iptv/screens/mobile_playlist_screen.dart';
-import 'mobile/features/iptv/screens/mobile_dashboard_screen.dart';
+import 'features/iptv/screens/mobile_playlist_screen.dart';
+import 'features/iptv/screens/mobile_dashboard_screen.dart';
 import 'core/models/playlist_config.dart';
 import 'core/database/hive_service.dart';
+import 'core/utils/startup_profiler.dart';
 
 /// Android-optimized entry point for XtremFlow IPTV
 /// No authentication - direct access to playlist selection
 void main() async {
+  StartupProfiler.start('app_init');
+
   WidgetsFlutterBinding.ensureInitialized();
+  StartupProfiler.mark('flutter_binding_init');
 
   // Initialize MediaKit (required for video playback)
   MediaKit.ensureInitialized();
+  StartupProfiler.mark('media_kit_init');
 
   // Initialize Hive (Centralized)
   await HiveService.init();
+  StartupProfiler.mark('hive_init');
 
   // CLEAR CACHE ON STARTUP (Requested by User)
   try {
@@ -28,6 +34,9 @@ void main() async {
   } catch (e) {
     debugPrint('XtremFlow: Failed to clear cache: $e');
   }
+  StartupProfiler.mark('cache_clear');
+
+  await StartupProfiler.reportAll();
 
   runApp(const ProviderScope(child: XtremFlowApp()));
 }