style: 左侧展开宽度256px

src/layouts/BasicLayout.vue

@@ -268,6 +268,7 @@ onUnmounted(() => {
       v-bind="proConfig"
       :iconfont-url="scriptUrl"
       :locale="fnLocale"
+      :sider-width="256"
     >
       <!--插槽-菜单头-->
       <template #menuHeaderRender>