fix: 调整产品列表页渲染机制

- 渲染机制：产品列表页懒加载采用el-skeleton自身模板机制
- 布局调整：调整产品页/骨架屏在竖屏下的布局

app/pages/support/contact-us.vue

@@ -7,7 +7,12 @@
     </div>
 
     <div class="page-content">
-      <el-skeleton :rows="10" :loading="pending" animated>
+      <el-skeleton
+        :rows="10"
+        :loading="pending"
+        animated
+        :throttle="{ leading: 500, trailing: 500 }"
+      >
         <template #default>
           <!-- eslint-disable-next-line vue/no-v-html -->
           <div class="html-typography" v-html="contactInfo?.content || ''" />