Fix the issue with Chinese fonts on menu flyout items and appbar buttons in compose page.

Wino.Mail.WinUI/Controls/MenuFlyoutLanguageHelper.cs

@@ -1,4 +1,5 @@
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.UI.Xaml;
 using Microsoft.UI.Xaml.Controls;
 using Wino.Core.Domain.Enums;
 using Wino.Core.Domain.Interfaces;
@@ -9,15 +10,36 @@ internal static class MenuFlyoutLanguageHelper
 {
     private const string ChineseLanguageTag = "zh-CN";
 
-    public static void Apply(MenuFlyoutItemBase item)
+    public static void Apply(DependencyObject? element)
     {
+        if (element == null)
+        {
+            return;
+        }
+
         if (WinoApplication.Current.Services.GetRequiredService<IPreferencesService>().CurrentLanguage == AppLanguage.Chinese)
         {
-            item.Language = ChineseLanguageTag;
+            switch (element)
+            {
+                case MenuFlyoutItemBase menuFlyoutItem:
+                    menuFlyoutItem.Language = ChineseLanguageTag;
+                    break;
+                case FrameworkElement frameworkElement:
+                    frameworkElement.Language = ChineseLanguageTag;
+                    break;
+            }
         }
         else
         {
-            item.ClearValue(MenuFlyoutItemBase.LanguageProperty);
+            switch (element)
+            {
+                case MenuFlyoutItemBase menuFlyoutItem:
+                    menuFlyoutItem.ClearValue(MenuFlyoutItemBase.LanguageProperty);
+                    break;
+                case FrameworkElement frameworkElement:
+                    frameworkElement.ClearValue(FrameworkElement.LanguageProperty);
+                    break;
+            }
         }
     }
 }

Wino.Mail.WinUI/Controls/OperationCommandBar.cs

@@ -438,6 +438,11 @@ public sealed partial class OperationCommandBar : CommandBar
             frameworkElement.DataContext = dataContext;
         }
 
+        if (element is DependencyObject dependencyObject)
+        {
+            MenuFlyoutLanguageHelper.Apply(dependencyObject);
+        }
+
         return element;
     }