撞车订单新增「接待中」状态，支持后台接待标记

已支付订单可标记为接待中，避免重复跟进；完成/取消覆盖接待中状态，前后台同步展示与筛选。

frontend/src/features/admin/views/AdminMohongOrdersView.vue

@@ -7,6 +7,7 @@ import {
   completeAdminMohongOrder,
   fetchAdminMohongOrders,
   mohongOrderStatusLabel,
+  receiveAdminMohongOrder,
   type MohongOrder,
 } from '@/features/mohong/api/mohong'
 import { formatCent } from '@/shared/utils/money'
@@ -43,6 +44,19 @@ async function load() {
   }
 }
 
+async function handleReceive(row: MohongOrder) {
+  try {
+    await ElMessageBox.confirm(`确认接待订单 ${row.order_no}？标记后状态变为「接待中」。`, '提示', {
+      type: 'info',
+    })
+    await receiveAdminMohongOrder(row.id)
+    ElMessage.success('已标记为接待中')
+    await load()
+  } catch (error) {
+    if (error !== 'cancel') ElMessage.error(readError(error, '操作失败'))
+  }
+}
+
 async function handleComplete(row: MohongOrder) {
   try {
     await ElMessageBox.confirm(`确认将订单 ${row.order_no} 标记为已完成？`, '提示', {
@@ -71,6 +85,20 @@ async function handleCancel(row: MohongOrder) {
   }
 }
 
+function canReceive(row: MohongOrder) {
+  return row.status === 'paid'
+}
+
+function canComplete(row: MohongOrder) {
+  return row.status === 'paid' || row.status === 'receiving'
+}
+
+function canCancel(row: MohongOrder) {
+  return (
+    row.status === 'pending_payment' || row.status === 'paid' || row.status === 'receiving'
+  )
+}
+
 async function copyText(text: string) {
   try {
     await navigator.clipboard.writeText(text)
@@ -86,7 +114,7 @@ async function copyText(text: string) {
     <div class="page-head">
       <div>
         <h2>撞车订单</h2>
-        <p>查看订单、完成履约、复制用户订单信息</p>
+        <p>查看订单、接待买家、完成履约、复制用户订单信息</p>
       </div>
       <el-button :icon="Refresh" @click="load">刷新</el-button>
     </div>
@@ -96,6 +124,7 @@ async function copyText(text: string) {
       <el-select v-model="status" clearable placeholder="状态" style="width: 140px">
         <el-option label="待支付" value="pending_payment" />
         <el-option label="已支付" value="paid" />
+        <el-option label="接待中" value="receiving" />
         <el-option label="已完成" value="completed" />
         <el-option label="已取消" value="cancelled" />
       </el-select>
@@ -121,23 +150,16 @@ async function copyText(text: string) {
       <el-table-column label="下单时间" min-width="160">
         <template #default="{ row }">{{ formatDateTime(row.created_at) }}</template>
       </el-table-column>
-      <el-table-column label="操作" width="220" fixed="right">
+      <el-table-column label="操作" width="260" fixed="right">
         <template #default="{ row }">
           <el-button link type="primary" @click="detail = row">详情</el-button>
-          <el-button
-            v-if="row.status === 'paid'"
-            link
-            type="success"
-            @click="handleComplete(row)"
-          >
+          <el-button v-if="canReceive(row)" link type="warning" @click="handleReceive(row)">
+            接待
+          </el-button>
+          <el-button v-if="canComplete(row)" link type="success" @click="handleComplete(row)">
             完成
           </el-button>
-          <el-button
-            v-if="row.status === 'pending_payment' || row.status === 'paid'"
-            link
-            type="danger"
-            @click="handleCancel(row)"
-          >
+          <el-button v-if="canCancel(row)" link type="danger" @click="handleCancel(row)">
             取消
           </el-button>
         </template>