feat: persist playback speed

close #237

lib/screens/video_player_screen.dart

@@ -47,7 +47,6 @@ class VideoPlayerScreen extends StatefulWidget {
   final PlexMetadata metadata;
   final AudioTrack? preferredAudioTrack;
   final SubtitleTrack? preferredSubtitleTrack;
-  final double? preferredPlaybackRate;
   final int selectedMediaIndex;
   final bool isOffline;
 
@@ -56,7 +55,6 @@ class VideoPlayerScreen extends StatefulWidget {
     required this.metadata,
     this.preferredAudioTrack,
     this.preferredSubtitleTrack,
-    this.preferredPlaybackRate,
     this.selectedMediaIndex = 0,
     this.isOffline = false,
   });
@@ -1216,6 +1214,7 @@ class VideoPlayerScreenState extends State<VideoPlayerScreen> with WidgetsBindin
     if (!mounted || player == null) return;
 
     final profileSettings = context.read<UserProfileProvider>().profileSettings;
+    final settingsService = await SettingsService.getInstance();
     final trackService = TrackSelectionService(
       player: player!,
       profileSettings: profileSettings,
@@ -1226,7 +1225,7 @@ class VideoPlayerScreenState extends State<VideoPlayerScreen> with WidgetsBindin
     await trackService.selectAndApplyTracks(
       preferredAudioTrack: widget.preferredAudioTrack,
       preferredSubtitleTrack: widget.preferredSubtitleTrack,
-      preferredPlaybackRate: widget.preferredPlaybackRate,
+      defaultPlaybackSpeed: settingsService.getDefaultPlaybackSpeed(),
       onAudioTrackChanged: _onAudioTrackChanged,
       onSubtitleTrackChanged: _onSubtitleTrackChanged,
     );
@@ -1462,7 +1461,6 @@ class VideoPlayerScreenState extends State<VideoPlayerScreen> with WidgetsBindin
 
     final currentAudioTrack = currentPlayer.state.track.audio;
     final currentSubtitleTrack = currentPlayer.state.track.subtitle;
-    final currentRate = currentPlayer.state.rate;
 
     // Pause and stop current playback
     currentPlayer.pause();
@@ -1479,7 +1477,6 @@ class VideoPlayerScreenState extends State<VideoPlayerScreen> with WidgetsBindin
         metadata: episodeMetadata,
         preferredAudioTrack: currentAudioTrack,
         preferredSubtitleTrack: currentSubtitleTrack,
-        preferredPlaybackRate: currentRate,
         usePushReplacement: true,
       );
     }

lib/services/episode_navigation_service.dart

@@ -97,7 +97,6 @@ class EpisodeNavigationService {
         metadata: episode,
         preferredAudioTrack: currentAudioTrack,
         preferredSubtitleTrack: currentSubtitleTrack,
-        preferredPlaybackRate: currentPlaybackRate,
         usePushReplacement: usePushReplacement,
       );
     }

lib/services/keyboard_shortcuts_service.dart

@@ -305,15 +305,18 @@ class KeyboardShortcutsService {
         onPreviousChapter?.call();
         break;
       case 'speed_increase':
-        final newRate = (player.state.rate + 0.1).clamp(0.1, 3.0);
-        player.setRate(newRate);
+        final newRateUp = (player.state.rate + 0.1).clamp(0.1, 3.0);
+        player.setRate(newRateUp);
+        _settingsService.setDefaultPlaybackSpeed(newRateUp);
         break;
       case 'speed_decrease':
-        final newRate = (player.state.rate - 0.1).clamp(0.1, 3.0);
-        player.setRate(newRate);
+        final newRateDown = (player.state.rate - 0.1).clamp(0.1, 3.0);
+        player.setRate(newRateDown);
+        _settingsService.setDefaultPlaybackSpeed(newRateDown);
         break;
       case 'speed_reset':
         player.setRate(1.0);
+        _settingsService.setDefaultPlaybackSpeed(1.0);
         break;
     }
   }

lib/services/settings_service.dart

@@ -61,6 +61,7 @@ class SettingsService extends BaseSharedPreferencesService {
   static const String _keyMaxVolume = 'max_volume';
   static const String _keyEnableDiscordRPC = 'enable_discord_rpc';
   static const String _keyMatchContentFrameRate = 'match_content_frame_rate';
+  static const String _keyDefaultPlaybackSpeed = 'default_playback_speed';
 
   SettingsService._();
 
@@ -947,6 +948,15 @@ class SettingsService extends BaseSharedPreferencesService {
     return prefs.getBool(_keyMatchContentFrameRate) ?? false; // Default disabled
   }
 
+  // Default Playback Speed (0.5 to 3.0)
+  Future<void> setDefaultPlaybackSpeed(double speed) async {
+    await prefs.setDouble(_keyDefaultPlaybackSpeed, speed.clamp(0.5, 3.0));
+  }
+
+  double getDefaultPlaybackSpeed() {
+    return prefs.getDouble(_keyDefaultPlaybackSpeed) ?? 1.0; // Default: normal speed
+  }
+
   // Reset all settings to defaults
   Future<void> resetAllSettings() async {
     await Future.wait([
@@ -989,6 +999,7 @@ class SettingsService extends BaseSharedPreferencesService {
       prefs.remove(_keyMpvConfigPresets),
       prefs.remove(_keyEnableDiscordRPC),
       prefs.remove(_keyMatchContentFrameRate),
+      prefs.remove(_keyDefaultPlaybackSpeed),
     ]);
   }
 

lib/services/track_selection_service.dart

@@ -446,7 +446,7 @@ class TrackSelectionService {
   Future<void> selectAndApplyTracks({
     AudioTrack? preferredAudioTrack,
     SubtitleTrack? preferredSubtitleTrack,
-    double? preferredPlaybackRate,
+    double? defaultPlaybackSpeed,
     Function(AudioTrack)? onAudioTrackChanged,
     Function(SubtitleTrack)? onSubtitleTrackChanged,
   }) async {
@@ -491,9 +491,9 @@ class TrackSelectionService {
       onSubtitleTrackChanged(selectedSubtitleTrack);
     }
 
-    // Set playback rate if preferred rate was provided
-    if (preferredPlaybackRate != null) {
-      player.setRate(preferredPlaybackRate);
+    // Apply default playback speed from settings
+    if (defaultPlaybackSpeed != null && defaultPlaybackSpeed != 1.0) {
+      player.setRate(defaultPlaybackSpeed);
     }
   }
 }

lib/utils/video_player_navigation.dart

@@ -19,7 +19,6 @@ const String kVideoPlayerRouteName = '/video_player';
 /// - [metadata]: The Plex metadata for the content to play
 /// - [preferredAudioTrack]: Optional audio track to select on playback start
 /// - [preferredSubtitleTrack]: Optional subtitle track to select on playback start
-/// - [preferredPlaybackRate]: Optional playback speed to set on playback start
 /// - [selectedMediaIndex]: Optional media version index to use; if not provided,
 ///   loads the saved preference for the series/movie. Defaults to 0 if no preference exists.
 /// - [usePushReplacement]: If true, replaces current route instead of pushing;
@@ -33,7 +32,6 @@ Future<bool?> navigateToVideoPlayer(
   required PlexMetadata metadata,
   AudioTrack? preferredAudioTrack,
   SubtitleTrack? preferredSubtitleTrack,
-  double? preferredPlaybackRate,
   int? selectedMediaIndex,
   bool usePushReplacement = false,
   bool isOffline = false,
@@ -72,7 +70,6 @@ Future<bool?> navigateToVideoPlayer(
       metadata: metadata,
       preferredAudioTrack: preferredAudioTrack,
       preferredSubtitleTrack: preferredSubtitleTrack,
-      preferredPlaybackRate: preferredPlaybackRate,
       selectedMediaIndex: mediaIndex,
       isOffline: isOffline,
     ),
@@ -108,7 +105,6 @@ Future<bool?> navigateToVideoPlayerWithRefresh(
   VoidCallback? onRefresh,
   AudioTrack? preferredAudioTrack,
   SubtitleTrack? preferredSubtitleTrack,
-  double? preferredPlaybackRate,
   int? selectedMediaIndex,
   bool usePushReplacement = false,
 }) async {
@@ -118,7 +114,6 @@ Future<bool?> navigateToVideoPlayerWithRefresh(
     isOffline: isOffline,
     preferredAudioTrack: preferredAudioTrack,
     preferredSubtitleTrack: preferredSubtitleTrack,
-    preferredPlaybackRate: preferredPlaybackRate,
     selectedMediaIndex: selectedMediaIndex,
     usePushReplacement: usePushReplacement,
   );

lib/widgets/video_controls/sheets/video_settings_sheet.dart

@@ -338,9 +338,14 @@ class _VideoSettingsSheetState extends State<VideoSettingsSheet> {
             return ListTile(
               title: Text(label, style: TextStyle(color: isSelected ? Colors.blue : Colors.white)),
               trailing: isSelected ? const AppIcon(Symbols.check_rounded, fill: 1, color: Colors.blue) : null,
-              onTap: () {
+              onTap: () async {
                 widget.player.setRate(speed);
-                Navigator.pop(context); // Close sheet after selection
+                // Save as default playback speed
+                final settings = await SettingsService.getInstance();
+                await settings.setDefaultPlaybackSpeed(speed);
+                if (context.mounted) {
+                  Navigator.pop(context); // Close sheet after selection
+                }
               },
             );
           },