reduce mediator duffs

Hyperbar.Windows/App.xaml.cs

@@ -1,11 +1,9 @@
-using Hyperbar.Extensions;
-using Hyperbar.Widget.Contextual;
+using Hyperbar.Widget.Contextual;
 using Hyperbar.Windows.Controls;
 using Hyperbar.Windows.Primary;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
-using Microsoft.Extensions.Options;
 using Microsoft.UI.Xaml;
 
 namespace Hyperbar.Windows;

Hyperbar.Windows/Lifecycles/IServiceCollectionExtensions.cs

@@ -1,5 +1,4 @@
-using Hyperbar.Extensions;
-using Hyperbar.Windows.Interop;
+using Hyperbar.Windows.Interop;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
@@ -32,7 +31,7 @@ namespace Hyperbar.Windows
                     isolatedServices.AddSingleton<IVirtualKeyboard, VirtualKeyboard>();
 
                     isolatedServices.AddSingleton<IMediator, Mediator>();
-                    isolatedServices.AddHandler<KeyAcceleratorCommandHandler>();
+                    isolatedServices.AddHandler<KeyAcceleratorHandler>();
 
                     isolatedServices.AddTransient<IWidgetView, WidgetView>();
                     isolatedServices.AddContentTemplate<WidgetButtonViewModel, WidgetButtonView>();

Hyperbar.Windows/Mediators/KeyAcceleratorHandler.cs

@@ -2,8 +2,8 @@
 
 namespace Hyperbar.Windows;
 
-public class KeyAcceleratorCommandHandler(IVirtualKeyboard virtualKeyboard) :
-    ICommandHandler<KeyAcceleratorCommand>
+public class KeyAcceleratorHandler(IVirtualKeyboard virtualKeyboard) :
+    IRequestHandler<KeyAcceleratorCommand>
 {
     public ValueTask<Unit> Handle(KeyAcceleratorCommand command,
         CancellationToken cancellationToken)