fix: the style problem caused by SideMenu.vue overflow; 🐛

修复：SideMenu.vue 组件溢出导致的样式问题；

src/layouts/AdminLayout.vue

@@ -1,5 +1,5 @@
 <template>
-  <a-layout :class="['admin-layout', fixedSideBar ? 'fixed-side-bar' : '']">
+  <a-layout :class="['admin-layout', fixedSideBar ? 'fixed-side-bar' : '', 'beauty-scroll']">
     <drawer v-if="isMobile" v-model="collapsed">
       <side-menu :theme="theme.mode" :menuData="menuData" :collapsed="false" :collapsible="false" @menuSelect="onMenuSelect"/>
     </drawer>