ux: close AIAssistant dialog immediately after applying the generated message (#2535)

Signed-off-by: leo <longshuang@msn.cn>

Author: love-linger

src/Views/AIAssistant.axaml.cs

@@ -168,6 +168,7 @@ private void OnUseClicked(object sender, RoutedEventArgs e)
             if (DataContext is ViewModels.AIAssistant vm && !string.IsNullOrEmpty(vm.Response))
                 vm.Use(vm.Response);
 
+            Close();
             e.Handled = true;
         }