feat: quick fix and rename.

demo/Ursa.Demo/App.axaml

@@ -5,6 +5,6 @@
     xmlns:u-semi="https://irihi.tech/ursa/themes/semi">
     <Application.Styles>
         <StyleInclude Source="avares://Semi.Avalonia/Themes/Index.axaml" />
-        <u-semi:SemiTheme Locale="en-US"/>
+        <u-semi:SemiTheme Locale="zh-CN"/>
     </Application.Styles>
 </Application>

demo/Ursa.Demo/Dialogs/DialogWithActionViewModel.cs

@@ -14,10 +14,10 @@ public partial class DialogWithActionViewModel: ObservableObject, IDialogContext
 
     public void Close()
     {
-        Closed?.Invoke(this, false);
+        RequestClose?.Invoke(this, false);
     }
 
-    public event EventHandler<object?>? Closed;
+    public event EventHandler<object?>? RequestClose;
     
     public ICommand OKCommand { get; set; }
     public ICommand CancelCommand { get; set; }
@@ -35,12 +35,12 @@ public partial class DialogWithActionViewModel: ObservableObject, IDialogContext
 
     private void OK()
     {
-        Closed?.Invoke(this, true);
+        RequestClose?.Invoke(this, true);
     }
 
     private void Cancel()
     {
-        Closed?.Invoke(this, false);
+        RequestClose?.Invoke(this, false);
     }
     
     private async Task ShowDialog()