fix(player): sync restored volume state

lib/mpv/player/platform/player_android.dart

@@ -159,6 +159,7 @@ class PlayerAndroid extends PlayerBase {
   @override
   Future<void> setVolume(double volume) async {
     await invoke('setVolume', {'volume': volume});
+    if (!disposed) setVolumeState(volume);
   }
 
   @override

lib/mpv/player/player_base.dart

@@ -190,9 +190,7 @@ abstract class PlayerBase with PlayerStreamControllersMixin implements Player {
 
       case 'volume':
         if (value is num) {
-          final volume = value.toDouble();
-          _state = _state.copyWith(volume: volume);
-          volumeController.add(volume);
+          setVolumeState(value.toDouble());
         }
         break;
 
@@ -477,6 +475,13 @@ abstract class PlayerBase with PlayerStreamControllersMixin implements Player {
     tracksController.add(empty);
   }
 
+  @protected
+  void setVolumeState(double volume) {
+    if (_state.volume == volume) return;
+    _state = _state.copyWith(volume: volume);
+    volumeController.add(volume);
+  }
+
   @protected
   void setSeekable(bool seekable) {
     if (_state.seekable == seekable) return;

lib/mpv/player/player_native.dart

@@ -187,6 +187,7 @@ class PlayerNative extends PlayerBase {
   @override
   Future<void> setVolume(double volume) async {
     await setProperty('volume', volume.toString());
+    if (!disposed) setVolumeState(volume);
   }
 
   @override

lib/screens/video_player_screen.dart

@@ -719,7 +719,7 @@ class VideoPlayerScreenState extends State<VideoPlayerScreen> with WidgetsBindin
       await player!.setProperty('volume-max', maxVolume.toString());
 
       final savedVolume = settingsService.read(SettingsService.volume).clamp(0.0, maxVolume.toDouble());
-      unawaited(player!.setVolume(savedVolume));
+      await player!.setVolume(savedVolume);
 
       if (mounted) {
         setState(() {