Implemented tag refresh on a playlist. Made audio file scanning truly asynchronous. Added basic playlist sorting functionality.

Harmonia.WinUI/Views/PlaylistDetailView.xaml.cs

@@ -35,6 +35,28 @@ public sealed partial class PlaylistDetailView : UserControl
         {
             item.DataContextChanged += Item_DataContextChanged;
         }
+
+        foreach (SortItem sortItem in _viewModel.SortItems)
+        {
+            SortByMenuFlyoutSubItem.Items.Add(new MenuFlyoutItem
+            {
+                Text = sortItem.Name,
+                Command = _viewModel.SortAllCommand,
+                CommandParameter = sortItem
+            });
+
+            SortSelectedByMenuFlyoutSubItem.Items.Add(new MenuFlyoutItem
+            {
+                Text = sortItem.Name,
+                Command = _viewModel.SortSelectedCommand,
+                CommandParameter = sortItem
+            });
+        }
+
+        _viewModel.SortSelectedCommand.CanExecuteChanged += (_, _) =>
+            SortSelectedByMenuFlyoutSubItem.IsEnabled = _viewModel.SortSelectedCommand.CanExecute(null);
+
+        SortSelectedByMenuFlyoutSubItem.IsEnabled = _viewModel.SortSelectedCommand.CanExecute(null);
     }
 
     private void OnViewModelPropertyChanging(object? sender, PropertyChangingEventArgs e)