fix: 调整默认布局mix，修复底部宽度100%

src/store/modules/layout.ts

@@ -70,7 +70,7 @@ const proRender = (render: any) => (render === false ? false : undefined);
 const proConfigLocal: LayoutStore['proConfig'] = localGetJSON(
   CACHE_LOCAL_PROCONFIG
 ) || {
-  layout: 'side',
+  layout: 'mix',
   theme: 'light',
   menuTheme: 'light',
   fixSiderbar: true,