Fixed memory leak issue with song image source not getting disposed. Added playbackbar configuration button.

Harmonia.UI/ViewModels/PlayingSongInfoViewModel.cs

@@ -11,7 +11,7 @@ using System.Threading.Tasks;
 
 namespace Harmonia.UI.ViewModels;
 
-public class PlayingSongInfoViewModel : ViewModelBase
+public class PlayingSongInfoViewModel : ViewModelBase, IDisposable
 {
     private readonly IAudioPlayer _audioPlayer;
     private readonly IAudioImageCache _audioImageCache;
@@ -41,6 +41,7 @@ public class PlayingSongInfoViewModel : ViewModelBase
         }
         private set
         {
+            _songImageSource?.Dispose();
             _songImageSource = value;
             OnPropertyChanged();
         }
@@ -88,4 +89,10 @@ public class PlayingSongInfoViewModel : ViewModelBase
         using MemoryStream stream = new(songPictureInfo.Data);
         SongImageSource = new(stream);
     }
+
+    public void Dispose()
+    {
+        SongImageSource?.Dispose();
+        GC.SuppressFinalize(this);
+    }
 }