refactor: ♻️ 重构优化导航栏代码

src/components/SizeSelect/index.vue

@@ -2,9 +2,7 @@
   <!-- 布局大小 -->
   <el-tooltip :content="t('sizeSelect.tooltip')" effect="dark" placement="bottom">
     <el-dropdown trigger="click" @command="handleSizeChange">
-      <div>
-        <div class="i-svg:size" />
-      </div>
+      <div class="i-svg:size" />
       <template #dropdown>
         <el-dropdown-menu>
           <el-dropdown-item