feat: add subtitle toggle hotkey

lib/l10n/app_en.arb

@@ -1592,6 +1592,7 @@
   },
   "takeScreenshot": "Take screenshot",
   "takeScreenshotClean": "Take screenshot (without subtitles)",
+  "toggleSubtitles": "Toggle subtitles",
   "screenshotTaken": "Screenshot saved!",
   "screenshotCleanTaken": "Screenshot without subtitles saved!",
   "errorTakingScreenshot": "There was an error taking the screenshot",

lib/models/settings/video_player_settings.dart

@@ -33,6 +33,7 @@ enum VideoHotKeys {
   skipMediaSegment,
   takeScreenshot,
   takeScreenshotClean,
+  toggleSubtitles,
   exit;
 
   const VideoHotKeys();
@@ -57,6 +58,7 @@ enum VideoHotKeys {
       VideoHotKeys.skipMediaSegment => context.localized.skipMediaSegment,
       VideoHotKeys.takeScreenshot => context.localized.takeScreenshot,
       VideoHotKeys.takeScreenshotClean => context.localized.takeScreenshotClean,
+      VideoHotKeys.toggleSubtitles => context.localized.toggleSubtitles,
       VideoHotKeys.exit => context.localized.exit,
     };
   }
@@ -247,6 +249,7 @@ Map<VideoHotKeys, KeyCombination> get _defaultVideoHotKeys => {
           VideoHotKeys.takeScreenshot => KeyCombination(key: LogicalKeyboardKey.keyG),
           VideoHotKeys.takeScreenshotClean =>
             KeyCombination(key: LogicalKeyboardKey.keyG, modifier: LogicalKeyboardKey.controlLeft),
+          VideoHotKeys.toggleSubtitles => KeyCombination(key: LogicalKeyboardKey.keyT),
           VideoHotKeys.exit => KeyCombination(key: LogicalKeyboardKey.escape),
         },
     };

lib/screens/video_player/video_player_controls.dart

@@ -12,6 +12,7 @@ import 'package:screen_brightness/screen_brightness.dart';
 
 import 'package:fladder/models/item_base_model.dart';
 import 'package:fladder/models/items/media_segments_model.dart';
+import 'package:fladder/models/items/media_streams_model.dart';
 import 'package:fladder/models/media_playback_model.dart';
 import 'package:fladder/models/playback/playback_model.dart';
 import 'package:fladder/models/settings/video_player_settings.dart';
@@ -78,10 +79,13 @@ class _DesktopControlsState extends ConsumerState<DesktopControls> {
   double? _vDragStartValue;
   double? _vDragLastValue;
 
+  int? _lastSelectedSubtitleIndex;
+
   @override
   void initState() {
     super.initState();
     timer.reset();
+    _lastSelectedSubtitleIndex = null;
   }
 
   @override
@@ -909,6 +913,58 @@ class _DesktopControlsState extends ConsumerState<DesktopControls> {
     _vDragLastValue = null;
   }
 
+  void _toggleSubtitles() {
+    final playbackModel = ref.read(playBackModel);
+    final player = ref.read(videoPlayerProvider);
+    final subStreams = playbackModel?.subStreams;
+
+    if (subStreams == null || subStreams.isEmpty) return;
+
+    // Filter out the "off" track (index == -1)
+    final availableSubtitles = subStreams.where((s) => s.index != -1).toList();
+    if (availableSubtitles.isEmpty) return;
+
+    final currentIndex = playbackModel?.mediaStreams?.defaultSubStreamIndex ?? -1;
+
+    // If only one subtitle track, toggle between it and off
+    if (availableSubtitles.length == 1) {
+      final singleSub = availableSubtitles.first;
+      final newSub = currentIndex == singleSub.index ? SubStreamModel.no() : singleSub;
+      _setSubtitleTrack(newSub, playbackModel, player);
+      return;
+    }
+
+    // Multiple subtitle tracks
+    if (_lastSelectedSubtitleIndex == null) {
+      // First time - show selection dialog
+      showSubSelection(context).then((_) {
+        // After dialog closes, store the selected subtitle
+        final newModel = ref.read(playBackModel);
+        final selectedIndex = newModel?.mediaStreams?.defaultSubStreamIndex;
+        if (selectedIndex != null && selectedIndex != -1) {
+          _lastSelectedSubtitleIndex = selectedIndex;
+        }
+      });
+    } else {
+      // Toggle between off and last selected
+      final lastSub = subStreams.firstWhere(
+        (s) => s.index == _lastSelectedSubtitleIndex,
+        orElse: () => availableSubtitles.first,
+      );
+      final newSub = currentIndex == _lastSelectedSubtitleIndex ? SubStreamModel.no() : lastSub;
+      _setSubtitleTrack(newSub, playbackModel, player);
+    }
+  }
+
+  void _setSubtitleTrack(SubStreamModel subModel, PlaybackModel? playbackModel, dynamic player) async {
+    if (playbackModel == null) return;
+    final newModel = await playbackModel.setSubtitle(subModel, player);
+    ref.read(playBackModel.notifier).update((state) => newModel);
+    if (newModel != null) {
+      await ref.read(playbackModelHelper).shouldReload(newModel);
+    }
+  }
+
   bool _onKey(VideoHotKeys value) {
     final mediaSegments = ref.read(playBackModel.select((value) => value?.mediaSegments));
     final position = ref.read(mediaPlaybackProvider).position;
@@ -974,6 +1030,9 @@ class _DesktopControlsState extends ConsumerState<DesktopControls> {
       case VideoHotKeys.prevChapter:
         ref.read(videoPlayerSettingsProvider.notifier).prevChapter();
         return true;
+      case VideoHotKeys.toggleSubtitles:
+        _toggleSubtitles();
+        return true;
       case VideoHotKeys.stepForward:
         playing ? ref.read(videoPlayerProvider).playOrPause() : stepForward(ref);
         return true;