Added playlist renaming functionality.

Harmonia.WinUI/ViewModels/PlaylistDetailViewModel.cs

@@ -158,6 +158,7 @@ public partial class PlaylistDetailViewModel : ViewModelBase
     public IRelayCommand RandomizeSelectedCommand { get; }
     public IRelayCommand ReverseAllCommand { get; }
     public IRelayCommand ReverseSelectedCommand { get; }
+    public IAsyncRelayCommand RenamePlaylistCommand { get; }
     public IRelayCommand LockPlaylistCommand { get; }
     public IRelayCommand UnlockPlaylistCommand { get; }
 
@@ -212,6 +213,7 @@ public partial class PlaylistDetailViewModel : ViewModelBase
         RandomizeSelectedCommand = new RelayCommand(RandomizeSelectedSongs, AreMultipleSongsSelected);
         ReverseAllCommand = new RelayCommand(ReverseAllSongs);
         ReverseSelectedCommand = new RelayCommand(ReverseSelectedSongs, AreMultipleSongsSelected);
+        RenamePlaylistCommand = new AsyncRelayCommand(RenamePlaylist);
         LockPlaylistCommand = new RelayCommand(LockPlaylist);
         UnlockPlaylistCommand = new RelayCommand(UnlockPlaylist);
 
@@ -762,6 +764,22 @@ public partial class PlaylistDetailViewModel : ViewModelBase
         Playlist?.Unlock();
     }
 
+    private async Task RenamePlaylist()
+    {
+        if (Playlist == null)
+            return;
+
+        string newName = await _messageService.InputTextAsync(
+            $"Rename Playlist - {Playlist.Name}",
+            "Enter a new name for the playlist:",
+            Playlist.Name ?? string.Empty);
+
+        if (string.IsNullOrWhiteSpace(newName))
+            return;
+
+        Playlist.SetName(newName);
+    }
+
     #endregion
 }