Fix：4112 【商城小程序】礼包结算页面点击【默认封面】无反应（点击后应该弹出选择封面弹窗）

pkg_user/views/gift/gift.vue

@@ -1,5 +1,5 @@
 <template>
-  <view class="gift-page" v-if="goodsInfo.productInfo.storeName">
+  <view class="gift-page" v-if="goodsInfo.productInfo && goodsInfo.productInfo.storeName">
     <view class="top-card" v-if="!isPayOk ">
       <view class="v12-justify-between v12-pa-2">
         <view>
@@ -13,7 +13,7 @@
           <image class="custom-cover" :src="webUrl + '/icon/custom.png'" mode="heightFix" lazy-load="false">
             
           </image>
-          <view  @click="showCoverPicker = true">{{ cover }}封面</view>
+          <view  @click="handleShowCover">{{ cover }}封面</view>
           <view>
             <u-icon name="arrow-right" color="#c52733"></u-icon>
           </view>
@@ -297,6 +297,9 @@ export default {
   //   })
   // },
   methods: {
+    handleShowCover() {
+      this.showCoverPicker = true
+    },
     showCouponsPopup() {
       if (this.couponList.usable && this.couponList.usable.length === 0) return
       if(this.isPayOk) return