Improve sub navigations

Bitvault/BackActionViewModel.cs

@@ -0,0 +1,20 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using Toolkit.Foundation;
+
+namespace Bitvault;
+
+public partial class BackActionViewModel(IServiceProvider provider,
+    IServiceFactory factory,
+    IMediator mediator,
+    IPublisher publisher,
+    ISubscription subscriber,
+    IDisposer disposer) : Observable<string>(provider, factory, mediator, publisher, subscriber, disposer)
+{
+    [ObservableProperty]
+    private int index = 0;
+
+    [RelayCommand]
+    public void Invoke() => Publisher.Publish(Notify.As(new Search(Value)),
+        nameof(ItemCollectionViewModel));
+}