feat: persist volume

lib/screens/video_player_screen.dart

@@ -150,6 +150,10 @@ class _VideoPlayerScreenState extends State<VideoPlayerScreen> {
         );
       }
 
+      // Apply saved volume
+      final savedVolume = settingsService.getVolume();
+      player!.setVolume(savedVolume);
+
       // Notify that player is ready
       if (mounted) {
         setState(() {

lib/services/keyboard_shortcuts_service.dart

@@ -262,10 +262,12 @@ class KeyboardShortcutsService {
       case 'volume_up':
         final newVolume = (player.state.volume + 10).clamp(0.0, 100.0);
         player.setVolume(newVolume);
+        _settingsService.setVolume(newVolume);
         break;
       case 'volume_down':
         final newVolume = (player.state.volume - 10).clamp(0.0, 100.0);
         player.setVolume(newVolume);
+        _settingsService.setVolume(newVolume);
         break;
       case 'seek_forward':
         _seekWithClamping(player, Duration(seconds: _seekTimeSmall));
@@ -283,7 +285,9 @@ class KeyboardShortcutsService {
         onToggleFullscreen?.call();
         break;
       case 'mute_toggle':
-        player.setVolume(player.state.volume > 0 ? 0.0 : 100.0);
+        final newVolume = player.state.volume > 0 ? 0.0 : 100.0;
+        player.setVolume(newVolume);
+        _settingsService.setVolume(newVolume);
         break;
       case 'subtitle_toggle':
         onToggleSubtitles?.call();

lib/services/settings_service.dart

@@ -29,6 +29,7 @@ class SettingsService {
   static const String _keySleepTimerDuration = 'sleep_timer_duration';
   static const String _keyAudioSyncOffset = 'audio_sync_offset';
   static const String _keySubtitleSyncOffset = 'subtitle_sync_offset';
+  static const String _keyVolume = 'volume';
 
   static SettingsService? _instance;
   late SharedPreferences _prefs;
@@ -200,6 +201,15 @@ class SettingsService {
         0; // Default: 0ms (no offset)
   }
 
+  // Volume (0.0 to 100.0)
+  Future<void> setVolume(double volume) async {
+    await _prefs.setDouble(_keyVolume, volume);
+  }
+
+  double getVolume() {
+    return _prefs.getDouble(_keyVolume) ?? 100.0; // Default: full volume
+  }
+
   // Keyboard Shortcuts (Legacy String-based)
   Map<String, String> getDefaultKeyboardShortcuts() {
     return {
@@ -716,6 +726,7 @@ class SettingsService {
       _prefs.remove(_keySleepTimerDuration),
       _prefs.remove(_keyAudioSyncOffset),
       _prefs.remove(_keySubtitleSyncOffset),
+      _prefs.remove(_keyVolume),
     ]);
   }
 

lib/widgets/video_controls/video_controls.dart

@@ -1282,12 +1282,11 @@ class _PlexVideoControlsState extends State<PlexVideoControls>
                 isMuted ? Icons.volume_off : Icons.volume_up,
                 color: Colors.white,
               ),
-              onPressed: () {
-                if (isMuted) {
-                  widget.player.setVolume(100.0);
-                } else {
-                  widget.player.setVolume(0.0);
-                }
+              onPressed: () async {
+                final newVolume = isMuted ? 100.0 : 0.0;
+                widget.player.setVolume(newVolume);
+                final settings = await SettingsService.getInstance();
+                await settings.setVolume(newVolume);
               },
               padding: EdgeInsets.zero,
               constraints: const BoxConstraints(),
@@ -1312,6 +1311,10 @@ class _PlexVideoControlsState extends State<PlexVideoControls>
                   onChanged: (value) {
                     widget.player.setVolume(value);
                   },
+                  onChangeEnd: (value) async {
+                    final settings = await SettingsService.getInstance();
+                    await settings.setVolume(value);
+                  },
                   activeColor: Colors.white,
                   inactiveColor: Colors.white.withValues(alpha: 0.3),
                 ),