feat(shop): 新增Dashboard待付款订单统计及支持

- Dashboard待处理事项新增“待付款订单”项，使用statusFilter=0查询
- 点击待付款订单跳转至/shop/shopOrder?tab=unpaid页面
- shopOrder页面恢复“待付款”标签页，validTabs列表包含unpaid
- shopOrder页面根据路由query初始化活动标签，支持unpaid选项
- 新增dot-gold样式用于待付款订单高亮显示
- 订单数量接口新增待付款订单数获取及异常处理逻辑
- 调整组件中待处理事项列表，支持待付款订单数据响应式更新

src/views/shop/shopOrder/index.vue

@@ -36,10 +36,10 @@
       </div>
       <a-tabs type="card" v-model:activeKey="activeKey" @change="onTabs">
         <a-tab-pane key="all" tab="全部" />
+        <a-tab-pane key="unpaid" tab="待付款" />
         <a-tab-pane key="undelivered" tab="待发货" />
         <a-tab-pane key="unreceived" tab="待收货" />
         <a-tab-pane key="completed" tab="已完成" />
-<!--        <a-tab-pane key="unpaid" tab="待付款" />-->
         <a-tab-pane key="refunded" tab="退货/售后" />
         <a-tab-pane key="cancelled" tab="已关闭" />
       </a-tabs>
@@ -431,7 +431,7 @@
   const loading = ref(true);
   // 激活的标签（支持从路由参数初始化，如 /shop/shopOrder?tab=all）
   const route = useRoute();
-  const validTabs = ['all', 'undelivered', 'unreceived', 'completed', 'refunded', 'cancelled'];
+  const validTabs = ['all', 'unpaid', 'undelivered', 'unreceived', 'completed', 'refunded', 'cancelled'];
   const tabFromQuery = route.query.tab as string;
   const activeKey = ref<string>(
     validTabs.includes(tabFromQuery) ? tabFromQuery : 'undelivered'