升级Vue3，iView替换ElementPlus

- 删除babel配置、更新依赖与入口初始化
- 全量替换UI组件、样式适配，新增迁移文档与标签/过滤器自动化替换脚本

buyer/src/pages/home/userCenter/Coupons.vue

@@ -9,14 +9,11 @@
             <span
               v-if="item.couponType === 'PRICE'"
               class="fontsize_12 global_color"
-              >￥<span class="price">{{ item.price | unitPrice }}</span></span
-            >
+              >￥<span class="price">{{ $filters.unitPrice(item.price) }}</span></span>
             <span
               v-if="item.couponType === 'DISCOUNT'"
               class="fontsize_12 global_color"
-              ><span class="price">{{ item.discount }}</span
-              >折</span
-            >
+              ><span class="price">{{ item.discount }}</span>折</span>
             <span class="describe">满{{ item.consumeThreshold }}元可用</span>
           </div>
           <p>使用范围：{{ useScope(item.scopeType, item.storeName) }}</p>
@@ -33,17 +30,13 @@
         <i class="circle-bottom"></i>
       </li>
     </ul>
-    <Page
-      :total="total"
-      @on-change="changePageNum"
+    <el-pagination       :total="total"
+      @current-change="changePageNum"
       class="pageration"
-      @on-page-size-change="changePageSize"
+      @size-change="changePageSize"
       :page-size="params.pageSize"
-      show-total
-      show-sizer
-    >
-    </Page>
-    <Spin v-if="loading" fix></Spin>
+     layout="total, sizes, prev, pager, next"></el-pagination>
+    <el-skeleton v-if="loading" fix></el-skeleton>
   </div>
 </template>