style: 默认菜单主题色dark

src/store/modules/layout.ts

@@ -42,7 +42,7 @@ const proConfigLocal: LayoutStore['proConfig'] = localGetJSON(
 ) || {
   layout: 'mix',
   theme: 'light',
-  menuTheme: 'light',
+  menuTheme: 'dark',
   fixSiderbar: true,
   fixedHeader: true,
   splitMenus: true,