fix(mobile): optimize player UI for mobile portrait and tune HLS buffering

lib/features/iptv/screens/player_screen.dart

@@ -811,6 +811,64 @@ class _PlayerScreenState extends ConsumerState<PlayerScreen> {
     );
   }
 
+  List<Widget> _buildControlButtons(bool isSmallScreen) {
+    final buttonSize = isSmallScreen ? 40.0 : 44.0;
+    final playButtonSize = isSmallScreen ? 48.0 : 52.0;
+    final spacing = isSmallScreen ? 8.0 : 16.0;
+
+    return [
+      // Previous Channel
+      if (widget.channels != null && widget.channels!.length > 1)
+        _buildSimpleIconButton(
+          icon: Icons.skip_previous_rounded,
+          onTap: _previousChannel,
+          size: buttonSize,
+        ),
+
+      if (widget.channels != null && widget.channels!.length > 1)
+        SizedBox(width: spacing),
+
+      // Play/Pause (Large)
+      _buildSimpleIconButton(
+        icon: _isPlaying ? Icons.pause_rounded : Icons.play_arrow_rounded,
+        onTap: _togglePlayPause,
+        size: playButtonSize,
+        iconSize: isSmallScreen ? 24 : 28,
+        highlighted: true,
+      ),
+
+      if (widget.channels != null && widget.channels!.length > 1)
+        SizedBox(width: spacing),
+
+      // Next Channel
+      if (widget.channels != null && widget.channels!.length > 1)
+        _buildSimpleIconButton(
+          icon: Icons.skip_next_rounded,
+          onTap: _nextChannel,
+          size: buttonSize,
+        ),
+
+      SizedBox(width: spacing),
+
+      // Mute button
+      _buildSimpleIconButton(
+        icon: _isMuted ? Icons.volume_off_rounded : Icons.volume_up_rounded,
+        onTap: _toggleMute,
+        size: buttonSize,
+      ),
+
+      if (isSmallScreen) ...[
+        SizedBox(width: spacing),
+        // Fullscreen button inside the bar for mobile
+        _buildSimpleIconButton(
+          icon: Icons.fullscreen_rounded,
+          onTap: _toggleFullscreen,
+          size: buttonSize,
+        ),
+      ],
+    ];
+  }
+
   // Simple Icon Button for Live TV player (no BackdropFilter issues)
   Widget _buildSimpleIconButton({
     required IconData icon,

web/player_lite.html

@@ -214,12 +214,15 @@
             }
 
             const hls = new Hls({
-                maxBufferLength: 30,
-                maxMaxBufferLength: 60,
-                liveSyncDurationCount: 3,
-                liveMaxLatencyDurationCount: 6,
+                maxBufferLength: 60, // doubled for stability on mobile
+                maxMaxBufferLength: 120,
+                liveSyncDurationCount: 5, // more segments for safety
+                liveMaxLatencyDurationCount: 10,
                 liveDurationInfinity: true,
-                enableWorker: true
+                enableWorker: true,
+                backStep: 0.2, // step back slightly on stall
+                nudgeOffset: 0.1,
+                nudgeMaxRetry: 5
             });
 
             window.hlsInstance = hls;
@@ -505,10 +508,22 @@
                     video.currentTime = parseFloat(data.value);
                 }
             } else if (data.type === 'request_fullscreen') {
+                log('Fullscreen requested from parent');
                 const el = document.documentElement;
                 const requestMethod = el.requestFullscreen || el.webkitRequestFullscreen || el.webkitRequestFullScreen || el.mozRequestFullScreen || el.msRequestFullscreen;
+
                 if (requestMethod) {
-                    requestMethod.call(el).catch(e => log('Fullscreen error: ' + e));
+                    // Browsers require a user gesture for fullscreen. 
+                    // This message usually comes from a Flutter button tap, so it should count as a gesture.
+                    requestMethod.call(el).catch(e => {
+                        log('Fullscreen API error: ' + e);
+                        // Fallback: try element-specific request for iOS
+                        if (video.webkitEnterFullscreen) {
+                            video.webkitEnterFullscreen();
+                        }
+                    });
+                } else if (video.webkitEnterFullscreen) {
+                    video.webkitEnterFullscreen();
                 }
             }
         });