fix: avoid duplicate play next countdown

close #942

lib/screens/video_player_screen.dart

@@ -2528,7 +2528,7 @@ class VideoPlayerScreenState extends State<VideoPlayerScreen> with WidgetsBindin
     }
   }
 
-  void _onVideoCompleted(bool completed) async {
+  void _onVideoCompleted(bool completed, {bool skipAutoPlayCountdown = false}) async {
     // Live TV streams are continuous — ignore spurious EOF events caused by
     // inter-segment gaps in the chunked MKV transcode stream.
     if (widget.isLive) return;
@@ -2562,6 +2562,11 @@ class VideoPlayerScreenState extends State<VideoPlayerScreen> with WidgetsBindin
       final settings = await SettingsService.getInstance();
       final autoPlayEnabled = settings.read(SettingsService.autoPlayNextEpisode);
 
+      if (skipAutoPlayCountdown && autoPlayEnabled) {
+        unawaited(_playNext());
+        return;
+      }
+
       if (!mounted) return;
       setState(() {
         _showPlayNextDialog = true;
@@ -3787,7 +3792,8 @@ class VideoPlayerScreenState extends State<VideoPlayerScreen> with WidgetsBindin
                           }
                         },
                         onBack: _handleBackButton,
-                        onReachedEnd: () => _onVideoCompleted(true),
+                        onReachedEnd: ({skipAutoPlayCountdown = false}) =>
+                            _onVideoCompleted(true, skipAutoPlayCountdown: skipAutoPlayCountdown),
                         canControl: canControl,
                         hasFirstFrame: _hasFirstFrame,
                         playNextFocusNode: _showPlayNextDialog ? _playNextConfirmFocusNode : null,

lib/widgets/video_controls/video_controls.dart

@@ -88,7 +88,7 @@ Widget plexVideoControlsBuilder(
   Function(SubtitleTrack)? onSecondarySubtitleTrackChanged,
   Function(Duration position)? onSeekCompleted,
   VoidCallback? onBack,
-  VoidCallback? onReachedEnd,
+  void Function({required bool skipAutoPlayCountdown})? onReachedEnd,
   bool canControl = true,
   ValueNotifier<bool>? hasFirstFrame,
   FocusNode? playNextFocusNode,
@@ -219,9 +219,9 @@ class PlexVideoControls extends StatefulWidget {
   final VoidCallback? onBack;
 
   /// Called when the video has effectively reached the end (e.g. credits extend
-  /// to EOF and can't be seeked past). Parent should route this into its
-  /// normal completion flow so the auto-play-next setting is honored.
-  final VoidCallback? onReachedEnd;
+  /// to EOF and can't be seeked past). Parent should route this into its normal
+  /// completion flow so the auto-play-next setting is honored.
+  final void Function({required bool skipAutoPlayCountdown})? onReachedEnd;
 
   /// Whether the user can control playback (false in host-only mode for non-host).
   final bool canControl;
@@ -582,7 +582,7 @@ class _PlexVideoControlsState extends State<PlexVideoControls> with WindowListen
     });
   }
 
-  Future<void> _skipMarker() async {
+  Future<void> _skipMarker({bool skipAutoPlayCountdown = false}) async {
     if (_currentMarker == null) return;
 
     final marker = _currentMarker!;
@@ -591,10 +591,14 @@ class _PlexVideoControlsState extends State<PlexVideoControls> with WindowListen
     final isAtEnd = duration > Duration.zero && (duration - endTime).inMilliseconds <= 1000;
 
     if (marker.isCredits && isAtEnd) {
-      // Seeking to EOF is unreliable due to position stream throttling,
-      // so pause and defer to the parent's completion flow.
-      await widget.player.pause();
-      widget.onReachedEnd?.call();
+      if (!skipAutoPlayCountdown && widget.onNext != null) {
+        widget.onNext!.call();
+      } else {
+        // Seeking to EOF is unreliable due to position stream throttling,
+        // so pause and defer to the parent's completion flow.
+        await widget.player.pause();
+        widget.onReachedEnd?.call(skipAutoPlayCountdown: skipAutoPlayCountdown);
+      }
     } else {
       await _seekToPosition(endTime);
     }
@@ -632,7 +636,7 @@ class _PlexVideoControlsState extends State<PlexVideoControls> with WindowListen
 
       if (timer.tick >= totalTicks) {
         timer.cancel();
-        _performAutoSkip();
+        _performAutoSkip(skipAutoPlayCountdown: true);
       }
     });
   }
@@ -666,9 +670,9 @@ class _PlexVideoControlsState extends State<PlexVideoControls> with WindowListen
   }
 
   /// Perform the appropriate skip action based on marker type and next episode availability
-  void _performAutoSkip() {
+  void _performAutoSkip({bool skipAutoPlayCountdown = false}) {
     if (_currentMarker == null) return;
-    unawaited(_skipMarker());
+    unawaited(_skipMarker(skipAutoPlayCountdown: skipAutoPlayCountdown));
   }
 
   /// Check if auto-skip should be active for the current marker