优惠券请求的问题： 小程序没有请求

pages-activity/activity/yifanshang/index.vue

@@ -159,7 +159,7 @@
 <script setup>
 import { ref, computed, watch } from 'vue'
 import { onLoad, onUnload } from '@dcloudio/uni-app'
-import { getIssueChoices, joinLottery, createWechatOrder, getLotteryResult } from '@/api/appUser'
+import { getIssueChoices, joinLottery, createWechatOrder, getLotteryResult, getUserCoupons } from '@/api/appUser'
 import { requestLotterySubscription } from '@/utils/subscribe'
 // 公共组件 - uni-app需要直接导入.vue文件
 import ActivityPageLayout from '@/components/activity/ActivityPageLayout.vue'
@@ -579,6 +579,9 @@ function handlePayment() {
   const amount = (selectedChoices.value.length * Number(detail.value.price_draw || 0) / 100).toFixed(2)
   paymentAmount.value = amount
 
+  // 获取优惠券
+  fetchCoupons()
+
   console.log('[Yifanshang] Payment amount:', amount, 'Opening payment popup...')
 
   // 显示支付弹窗
@@ -612,6 +615,28 @@ function handleRandomDraw() {
   handlePayment()
 }
 
+// ============ 优惠券逻辑 (Fix BUG 5) ============
+async function fetchCoupons() {
+  const userId = uni.getStorageSync('user_id')
+  if (!userId) return
+  
+  try {
+    // 获取未使用(status=1)的优惠券
+    const res = await getUserCoupons(userId, 1, 1, 100)
+    if (res && Array.isArray(res.list)) {
+      // 简单过滤：只显示未过期的（虽然接口可能已过滤）
+      // TODO: 如果需要根据活动ID过滤适用券，需后端支持或在此处根据规则过滤
+      paymentCoupons.value = res.list
+    } else {
+      paymentCoupons.value = []
+    }
+    console.log('[Yifanshang] Fetched coupons:', paymentCoupons.value.length)
+  } catch (e) {
+    console.error('[Yifanshang] Failed to fetch coupons:', e)
+    paymentCoupons.value = []
+  }
+}
+
 // ============ 次数卡逻辑 ============
 const gamePasses = ref(null)
 const gamePassRemaining = computed(() => gamePasses.value?.total_remaining || 0)