修复菜单栏

Author: liuchuancong

lib/common/global/platform/desktop_manager.dart

@@ -240,13 +240,11 @@ class CustomTitleBar extends StatelessWidget {
         iconMouseOver: Colors.white,
         iconMouseDown: Colors.white,
       );
-      final Brightness brightness = theme.brightness;
-      final Color effectiveBackgroundColor = isFull
-          ? Colors.black
-          : (brightness == Brightness.dark ? Colors.black : theme.scaffoldBackgroundColor); // 浅色模式下的背景色
 
       return Container(
-        color: effectiveBackgroundColor,
+        color: isFull
+            ? Colors.black
+            : ThemeUtils.select(context, light: theme.scaffoldBackgroundColor, dark: Colors.black),
         child: WindowTitleBarBox(
           child: Row(
             children: [