style: 统一布局组件的代码块排布顺序

- 调整 src/layouts/ 下所有布局组件的代码块顺序
- 统一为 template → script → style 的规范排布
- 包括布局主体、侧边栏、头部、标签页等所有布局相关组件
- 符合项目 Vue3 组件文件结构规范

src/layouts/components/common/BackTop.vue

@@ -1,4 +1,5 @@
-<script setup lang="ts"></script>
+<script setup lang="ts">
+</script>
 
 <template>
   <n-back-top :bottom="80" :visibility-height="300">

src/layouts/components/index.ts

@@ -7,7 +7,6 @@ import CollapaseButton from './header/CollapaseButton.vue'
 import FullScreen from './header/FullScreen.vue'
 import Notices from './header/Notices.vue'
 import Search from './header/Search.vue'
-import UserCenter from './header/UserCenter.vue'
 
 import Logo from './sider/Logo.vue'
 import Menu from './sider/Menu.vue'
@@ -26,5 +25,4 @@ export {
   Setting,
   SettingDrawer,
   TabBar,
-  UserCenter,
 }

src/layouts/leftMenu.layout.vue

@@ -11,7 +11,6 @@ import {
   Search,
   Setting,
   TabBar,
-  UserCenter,
 } from './components'
 
 const routeStore = useRouteStore()

src/layouts/mixMenu.layout.vue

@@ -10,7 +10,6 @@ import {
   Search,
   Setting,
   TabBar,
-  UserCenter,
 } from './components'
 
 const routeStore = useRouteStore()

src/layouts/topMenu.layout.vue

@@ -9,7 +9,6 @@ import {
   Search,
   Setting,
   TabBar,
-  UserCenter,
 } from './components'
 
 const routeStore = useRouteStore()