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/mohong/api/mohong.ts

@@ -263,6 +263,14 @@ export async function fetchAdminMohongOrder(id: number | string) {
   return data.data
 }
 
+export async function receiveAdminMohongOrder(id: number, remark?: string) {
+  const { data } = await apiClient.post<ApiResponse<MohongOrder>>(
+    `/admin/crash/orders/${id}/receive`,
+    { remark: remark || '' }
+  )
+  return data.data
+}
+
 export async function completeAdminMohongOrder(id: number, remark?: string) {
   const { data } = await apiClient.post<ApiResponse<MohongOrder>>(
     `/admin/crash/orders/${id}/complete`,
@@ -293,6 +301,7 @@ export function mohongOrderStatusLabel(status: string) {
   const map: Record<string, string> = {
     pending_payment: '待支付',
     paid: '已支付',
+    receiving: '接待中',
     completed: '已完成',
     cancelled: '已取消',
     refunded: '已退款',

frontend/src/features/mohong/views/MohongOrdersView.vue

@@ -157,6 +157,11 @@ async function loadOrders() {
   color: #059669;
 }
 
+.status-tag.receiving {
+  background: #fff7ed;
+  color: #d97706;
+}
+
 .status-tag.completed {
   background: #eff6ff;
   color: #2563eb;