Scroll to top of the playlist on playlist change.

Harmonia.WinUI/Views/PlaylistDetailView.xaml.cs

@@ -58,6 +58,22 @@ public sealed partial class PlaylistDetailView : UserControl
 
             UpdateListViewItemStyle(listViewItem, true);
         }
+        else if (e.PropertyName == nameof(_viewModel.Playlist))
+        {
+            ScrollToTop();
+        }
+    }
+
+    private void ScrollToTop()
+    {
+        if (PlaylistListView.FindDescendant<ScrollViewer>() is ScrollViewer scrollViewer)
+        {
+            scrollViewer.ChangeView(null, 0, null, disableAnimation: false);
+        }
+        else if (_viewModel.FilteredPlaylistSongs.FirstOrDefault() is PlaylistSong firstSong)
+        {
+            PlaylistListView.ScrollIntoView(firstSong);
+        }
     }
 
     private void UpdateListViewItemStyle(FrameworkElement listViewItem, bool isPlaying)