fix(buyer): 补齐领券中心页头并处理秒杀空数据

buyer/src/pages/CouponCenter.vue

@@ -1,6 +1,7 @@
 <template>
   <div class="coupon-center">
     <BaseHeader></BaseHeader>
+    <SearchHeader></SearchHeader>
     <div class="content">
       <h2 class="coupon-page-title">领券中心</h2>
 
@@ -48,6 +49,7 @@ import { onMounted, reactive, ref } from "vue";
 import { useRoute, useRouter } from "vue-router";
 import { Modal } from "@/utils/message";
 import storage from "@/plugins/storage";
+import SearchHeader from "@/components/indexDecorate/components/SearchHeader.vue";
 import { couponList, receiveCoupon } from "@/api/member.js";
 
 const route = useRoute();

buyer/src/pages/promotion/seckill.vue

@@ -81,7 +81,7 @@ watch(currIndex, (val) => {
   interval = null;
   nowHour.value = new Date().getHours();
   countDown(val);
-  goodsList.value = list.value[val].seckillGoodsList;
+  goodsList.value = list.value[val]?.seckillGoodsList || [];
 });
 
 watch(diffSeconds, (val) => {
@@ -108,11 +108,11 @@ watch(diffSeconds, (val) => {
 });
 
 function getListByDay () {
-  // 当天秒杀活动
+  // 当天秒杀活动；result 可能为空数组（当天无活动），需判空避免取下标 0 报错
   seckillByDay().then((res) => {
-    if (res.success) {
+    if (res.success && res.result && res.result.length) {
       list.value = res.result;
-      goodsList.value = list.value[0].seckillGoodsList;
+      goodsList.value = list.value[0].seckillGoodsList || [];
       countDown(currIndex.value);
     }
   });