Add subtext indicating whether backdrop is not available

Author: onesounds

Flow.Launcher/Languages/en.xaml

@@ -196,6 +196,7 @@
     <system:String x:Key="Clock">Clock</system:String>
     <system:String x:Key="Date">Date</system:String>
     <system:String x:Key="BackdropType">Backdrop Type</system:String>
+    <system:String x:Key="BackdropTypeDisabledToolTip">Backdrop supported starting from Windows 11 build 22000 and above</system:String>
     <system:String x:Key="BackdropTypesNone">None</system:String>
     <system:String x:Key="BackdropTypesAcrylic">Acrylic</system:String>
     <system:String x:Key="BackdropTypesMica">Mica</system:String>

Flow.Launcher/SettingPages/ViewModels/SettingsPaneThemeViewModel.cs

@@ -21,6 +21,7 @@ namespace Flow.Launcher.SettingPages.ViewModels;
 public partial class SettingsPaneThemeViewModel : BaseModel
 {
     private const string DefaultFont = "Segoe UI";
+    public string BackdropSubText => !Win32Helper.IsBackdropSupported() ? App.API.GetTranslation("BackdropTypeDisabledToolTip") : ""; 
     public Settings Settings { get; }
     private readonly Theme _theme = Ioc.Default.GetRequiredService<Theme>();
 

Flow.Launcher/SettingPages/Views/SettingsPaneTheme.xaml

@@ -468,7 +468,8 @@
                 <cc:Card
                     Title="{DynamicResource BackdropType}"
                     Margin="0 0 0 0"
-                    Icon="&#xeb42;">
+                    Icon="&#xeb42;"
+                    Sub="{Binding BackdropSubText}">
                     <ComboBox
                         MinWidth="160"
                         VerticalAlignment="Center"
@@ -478,7 +479,6 @@
                         ItemsSource="{Binding BackdropTypesList}"
                         SelectedValue="{Binding BackdropType, Mode=TwoWay}"
                         SelectedValuePath="Value" />
-                    <!--  ✅ 추가  -->
                 </cc:Card>
 
                 <!--  Drop shadow effect  -->