feat(订单): 添加支付倒计时功能并优化订单状态管理

- 在订单卡片和订单列表中添加支付倒计时显示
- 实现倒计时自动更新和超时自动取消订单功能
- 优化订单状态更新逻辑，确保响应式更新
- 添加倒计时定时器清理机制，防止内存泄漏

 <!--
  * @Date: 2023-12-20 14:11:11
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-07-15 15:56:28
+ * @LastEditTime: 2025-07-16 18:20:38
  * @FilePath: /jgdl/src/components/payCard.vue
  * @Description: 文件描述
 -->
@@ -11,7 +11,7 @@
       <view style="padding: 2rem 1rem; text-align: center;">
         <view style="font-size: 32rpx;">实付金额</view>
         <view style="color: red; margin: 10rpx 0;"><text style="font-size: 50rpx;">￥</text><text style="font-size: 80rpx;">{{ price }}</text></view>
-        <!-- <view style="font-size: 28rpx; margin-bottom: 20rpx;">支付剩余时间 <text style="color: red;">{{ formatTime(remain_time) }}</text></view> -->
+        <view style="font-size: 28rpx; margin-bottom: 20rpx;">支付剩余时间 <text style="color: red;">{{ formatTime(remain_time) }}</text></view>
         <nut-button block color="#fb923c" @tap="goToPay">立即支付</nut-button>
       </view>
     </nut-action-sheet>

@@ -709,3 +709,15 @@
     color: #374151;
     line-height: 1.5;
 }
+
+.payment-countdown {
+  display: flex;
+  justify-content: flex-end;
+  margin: 16rpx 0;
+}
+
+.countdown-text {
+  color: #ff4757;
+  font-size: 24rpx;
+  font-weight: 500;
+}

 <!--
  * @Date: 2022-09-19 14:11:06
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-07-14 18:18:12
+ * @LastEditTime: 2025-07-16 18:22:16
  * @FilePath: /jgdl/src/pages/myOrders/index.vue
  * @Description: 订单管理页面
 -->
@@ -77,8 +77,13 @@
               </nut-col>
             </nut-row>
 
+            <!-- 支付剩余时间 -->
+            <view v-if="viewMode === 'buy' && order.status === 3" class="payment-countdown">
+              <text class="countdown-text">剩余支付时间：{{ formatCountdown(order.remain_time) }}</text>
+            </view>
+
             <!-- 操作按钮 -->
-            <view class="order-actions">
+            <view v-if="!order.is_sold" class="order-actions">
               <!-- 买车模式：待支付状态 -->
               <template v-if="viewMode === 'buy' && order.status === 3">
                 <nut-button type="default" size="small" @click="handleCancelOrder(order.id)"
@@ -309,7 +314,7 @@
 </template>
 
 <script setup>
-import { ref, computed, onMounted } from 'vue'
+import { ref, computed, onMounted, onUnmounted, nextTick } from 'vue'
 import Taro from '@tarojs/taro'
 import './index.less'
 import { $ } from '@tarojs/extend'
@@ -361,6 +366,9 @@ const soldOrders = ref([])
 const currentPage = ref(0)
 const pageLimit = ref(10)
 
+// 倒计时相关状态
+const countdownIntervals = ref(new Map()) // 存储每个订单的倒计时定时器
+
 /**
  * 根据当前视图模式和筛选条件获取过滤后的订单列表
  */
@@ -425,10 +433,17 @@ const loadOrderData = async (isLoadMore = false) => {
       // 处理多个订单数据
       const newOrders = response.data.list.map(orderData => {
         // 处理details数组，取第一个元素作为details对象
-        return {
+        const processedOrder = {
           ...orderData,
           details: orderData.details && orderData.details.length > 0 ? orderData.details[0] : null
         }
+
+        // 为待支付订单添加mock的倒计时时间（1800秒用于测试）
+        if (processedOrder.status === 3) {
+          processedOrder.remain_time = processedOrder.pay_time || 1800
+        }
+
+        return processedOrder
       })
 
       const targetOrders = viewMode.value === 'buy' ? boughtOrders : soldOrders
@@ -441,6 +456,13 @@ const loadOrderData = async (isLoadMore = false) => {
         currentPage.value = 0
       }
 
+      // 为待支付订单启动倒计时
+      newOrders.forEach(order => {
+        if (order.status === 3 && order.remain_time) {
+          startCountdown(order)
+        }
+      })
+
       // 判断是否还有更多数据
       hasMore.value = newOrders.length === pageLimit.value
     } else {
@@ -535,12 +557,124 @@ const getStatusClass = (status) => {
 }
 
 /**
+ * 格式化倒计时显示
+ * @param {number} seconds - 剩余秒数
+ * @returns {string} 格式化的时间字符串 HH:MM:SS
+ */
+const formatCountdown = (seconds) => {
+  if (!seconds || seconds <= 0) {
+    return '00:00:00'
+  }
+
+  const hours = Math.floor(seconds / 3600)
+  const minutes = Math.floor((seconds % 3600) / 60)
+  const secs = seconds % 60
+
+  return `${hours.toString().padStart(2, '0')}:${minutes.toString().padStart(2, '0')}:${secs.toString().padStart(2, '0')}`
+}
+
+/**
+ * 启动订单倒计时
+ * @param {Object} order - 订单对象
+ */
+const startCountdown = (order) => {
+  if (!order || order.status !== 3 || !order.remain_time) {
+    return
+  }
+
+  // 清除已存在的定时器
+  if (countdownIntervals.value.has(order.id)) {
+    clearInterval(countdownIntervals.value.get(order.id))
+  }
+
+  const timer = setInterval(async () => {
+    const orders = viewMode.value === 'buy' ? boughtOrders : soldOrders
+    const targetOrderIndex = orders.value.findIndex(o => o.id === order.id)
+
+    if (targetOrderIndex !== -1) {
+      const targetOrder = orders.value[targetOrderIndex]
+
+      if (targetOrder.remain_time > 0) {
+        // 创建新的订单对象来触发响应式更新
+        const updatedOrder = {
+          ...targetOrder,
+          remain_time: targetOrder.remain_time - 1
+        }
+
+        // 替换数组中的订单对象
+        orders.value.splice(targetOrderIndex, 1, updatedOrder)
+
+        // 使用nextTick确保DOM更新
+        await nextTick()
+      } else {
+        // 时间到，取消订单
+        clearInterval(timer)
+        countdownIntervals.value.delete(order.id)
+        handleTimeoutCancel(targetOrder)
+      }
+    } else {
+      // 订单不存在，清除定时器
+      clearInterval(timer)
+      countdownIntervals.value.delete(order.id)
+    }
+  }, 1000)
+
+  countdownIntervals.value.set(order.id, timer)
+}
+
+/**
+ * 处理超时取消订单
+ * @param {Object} order - 订单对象
+ */
+const handleTimeoutCancel = async (order) => {
+  // 清除该订单的倒计时定时器
+  if (countdownIntervals.value.has(order.id)) {
+    clearInterval(countdownIntervals.value.get(order.id))
+    countdownIntervals.value.delete(order.id)
+  }
+
+  // 更新订单状态为已取消
+  const orders = viewMode.value === 'buy' ? boughtOrders : soldOrders
+  const targetOrderIndex = orders.value.findIndex(o => o.id === order.id)
+
+  if (targetOrderIndex !== -1) {
+    // 创建新的订单对象来触发响应式更新
+    const updatedOrder = {
+      ...orders.value[targetOrderIndex],
+      status: 7
+    }
+
+    // 替换数组中的订单对象
+    orders.value.splice(targetOrderIndex, 1, updatedOrder)
+
+    // 使用nextTick确保DOM更新
+    await nextTick()
+  }
+
+  Taro.showToast({
+    title: '订单已超时取消',
+    icon: 'none',
+    duration: 2000
+  })
+}
+
+/**
+ * 清除所有倒计时定时器
+ */
+const clearAllCountdowns = () => {
+  countdownIntervals.value.forEach((timer) => {
+    clearInterval(timer)
+  })
+  countdownIntervals.value.clear()
+}
+
+/**
  * 处理支付
  */
-const handlePayment = ({ id, total_amount }) => {
+const handlePayment = ({ id, total_amount, remain_time }) => {
   onPay({
     id,
-    remain_time: 1800, // 30分钟
+    remain_time, // 30分钟
     price: total_amount
   })
 }
@@ -775,8 +909,26 @@ const performCancelOrder = async (orderId) => {
       const order = orders.value.find(o => o.id === orderId)
 
       if (order) {
+        // 清除该订单的倒计时定时器
+        if (countdownIntervals.value.has(orderId)) {
+          clearInterval(countdownIntervals.value.get(orderId))
+          countdownIntervals.value.delete(orderId)
+        }
+
         // 更新订单状态为已取消
-        order.status = 7
+        const orders = viewMode.value === 'buy' ? boughtOrders : soldOrders
+        const targetOrderIndex = orders.value.findIndex(o => o.id === orderId)
+
+        if (targetOrderIndex !== -1) {
+          // 创建新的订单对象来触发响应式更新
+          const updatedOrder = {
+            ...orders.value[targetOrderIndex],
+            status: 7
+          }
+
+          // 替换数组中的订单对象
+          orders.value.splice(targetOrderIndex, 1, updatedOrder)
+        }
 
         Taro.showToast({
           title: '订单已取消',
@@ -882,6 +1034,11 @@ onMounted(async () => {
     }
   }, 500);
 })
+
+// 页面卸载时清理定时器
+onUnmounted(() => {
+  clearAllCountdowns()
+})
 </script>
 
 <script>