feature: drop Windows 11 Mica support

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

Author: love-linger

src/App.axaml.cs

@@ -151,8 +151,6 @@ public static void SetTheme(string theme, string themeOverridesFile)
                     else
                         Models.CommitGraph.SetDefaultPens(overrides.GraphPenThickness);
 
-                    Native.OS.UseMicaOnWindows11 = overrides.UseMicaOnWindows11;
-
                     app.Resources.MergedDictionaries.Add(resDic);
                     app._themeOverrides = resDic;
                 }

src/Native/OS.cs

@@ -112,12 +112,6 @@ public static string ExternalDiffArgs
             set;
         } = string.Empty;
 
-        public static bool UseMicaOnWindows11
-        {
-            get => OperatingSystem.IsWindows() && OperatingSystem.IsWindowsVersionAtLeast(10, 0, 22000) && _enableMicaOnWindows11;
-            set => _enableMicaOnWindows11 = value;
-        }
-
         public static bool UseSystemWindowFrame
         {
             get => OperatingSystem.IsLinux() && _enableSystemWindowFrame;
@@ -349,6 +343,5 @@ private static void UpdateGitVersion()
         private static IBackend _backend = null;
         private static string _gitExecutable = string.Empty;
         private static bool _enableSystemWindowFrame = false;
-        private static bool _enableMicaOnWindows11 = true;
     }
 }

src/Views/Launcher.axaml

@@ -22,8 +22,8 @@
     <Grid Grid.Row="0" ColumnDefinitions="Auto,32,32,*,Auto">
       <!-- Bottom border -->
       <Border Grid.Column="0" Grid.ColumnSpan="5"
-              x:Name="TitleBarBG"
               BorderThickness="0,0,0,1" BorderBrush="{DynamicResource Brush.Border0}"
+              Background="{DynamicResource Brush.TitleBar}"
               DoubleTapped="MaximizeOrRestoreWindow"
               PointerPressed="BeginMoveWindow"/>
 

src/Views/Launcher.axaml.cs

@@ -4,7 +4,6 @@
 using Avalonia.Controls;
 using Avalonia.Input;
 using Avalonia.Interactivity;
-using Avalonia.Markup.Xaml.MarkupExtensions;
 using Avalonia.Media;
 using Avalonia.Platform;
 using Avalonia.VisualTree;
@@ -62,17 +61,6 @@ public Launcher()
             InitializeComponent();
             PositionChanged += OnPositionChanged;
 
-            if (Native.OS.UseMicaOnWindows11)
-            {
-                Background = Brushes.Transparent;
-                TransparencyLevelHint = [WindowTransparencyLevel.Mica];
-                TitleBarBG.Background = Brushes.Transparent;
-            }
-            else
-            {
-                TitleBarBG.Bind(BackgroundProperty, new DynamicResourceExtension("Brush.TitleBar"));
-            }
-
             var layout = ViewModels.Preferences.Instance.Layout;
             Width = layout.LauncherWidth;
             Height = layout.LauncherHeight;