perf: 主界面布局滚动条显示样式处理 (#59)

perf: 主界面布局滚动条采用el-scrollbar

src/layout/components/appMain.vue

@@ -15,6 +15,7 @@ const transition = computed(() => {
 
 <template>
   <section class="app-main">
+    <el-scrollbar>
       <router-view>
         <template #default="{ Component, route }">
           <transition
@@ -45,6 +46,7 @@ const transition = computed(() => {
           </transition>
         </template>
       </router-view>
+    </el-scrollbar>
   </section>
 </template>