feat: implement Turbo-Start stream acceleration

- Add direct MPEG-TS support and optimized HLS tuning
- Implement low-latency sync and instant bitrate selection
- Achieve TiviMate-like zapping speed by reducing initial buffers

lib/features/iptv/screens/player_screen.dart

@@ -132,20 +132,29 @@ class _PlayerScreenState extends ConsumerState<PlayerScreen> {
       }
 
       // Store URL for Lite Player
+      final isMobile = MediaQuery.of(context).size.width < 600;
+      final isLiveTV = widget.streamType == StreamType.live;
+      
+      // TURBO-START: Use direct MPEG-TS for Live TV on Desktop/Android for instant zapping
+      if (isLiveTV && !isMobile) {
+        streamUrl = service.getLiveStreamUrlTs(currentStreamId);
+      }
+
       _currentStreamUrl = streamUrl;
 
       final encodedUrl = Uri.encodeComponent(streamUrl);
       // Force player choice based on stream type:
       // - Live TV: Player Lite (simple TS playback with mpegts.js)
       // - VOD/Series: Player Standard (fuller controls, HLS support)
-      final isMobile = MediaQuery.of(context).size.width < 600;
-      final isLiveTV = widget.streamType == StreamType.live;
+      
       // Cache buster to force reload of updated player.html
       final cacheBuster = DateTime.now().millisecondsSinceEpoch;
 
       final streamTypeParam = widget.streamType == StreamType.live ? 'live' : 'vod';
       final playerFile = isMobile ? 'player_mobile.html' : (isLiveTV ? 'player_lite.html' : 'player.html');
-      var playerSrc = '$playerFile?url=$encodedUrl&type=$streamTypeParam&v=$cacheBuster';
+      
+      // Inject Turbo-Start flag
+      var playerSrc = '$playerFile?url=$encodedUrl&type=$streamTypeParam&turbo=true&v=$cacheBuster';
 
       if (startTimeOverride != null) {
         playerSrc += '&t=$startTimeOverride';

lib/features/iptv/services/xtream_service.dart

@@ -89,13 +89,24 @@ class XtreamService {
     _currentPlaylist = playlist;
   }
 
-  /// Generate stream URL for live TV
+  /// Generate stream URL for live TV (HLS)
   String getLiveStreamUrl(String streamId) {
     if (_currentPlaylist == null) throw Exception('No playlist configured');
-    // Use HLS (.m3u8) with a subpath to ensure relative segments resolve correctly
     return '$_backendBaseUrl/api/live/$streamId/playlist.m3u8';
   }
 
+  /// Generate stream URL for live TV (Direct MPEG-TS)
+  /// Faster zapping on compatible players (mpegts.js)
+  String getLiveStreamUrlTs(String streamId) {
+    if (_currentPlaylist == null) throw Exception('No playlist configured');
+    // Direct link to the .ts stream through our proxy
+    final dns = _currentPlaylist!.dns;
+    final user = _currentPlaylist!.username;
+    final pass = _currentPlaylist!.password;
+    final url = '$dns/live/$user/$pass/$streamId.ts';
+    return '$_backendBaseUrl/api/xtream/${Uri.encodeComponent(url)}';
+  }
+
   /// Generate stream URL for VOD (movies)
   String getVodStreamUrl(String streamId, String containerExtension) {
     if (_currentPlaylist == null) throw Exception('No playlist configured');