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/orders/views/MobileOrdersView.vue

@@ -67,6 +67,7 @@ const statusTabs = [
   { key: 'pending_handoff', label: '待交接' },
   { key: 'renting', label: '使用中' },
   { key: 'paid', label: '已支付' },
+  { key: 'receiving', label: '接待中' },
   { key: 'pending_checkout_confirm', label: '待结账' },
   { key: 'completed', label: '已完成' },
   { key: 'cancelled', label: '已取消' },
@@ -638,6 +639,10 @@ async function copyListingCode(order: Order) {
   color: #1477ff;
   background: rgba(20, 119, 255, 0.08);
 }
+.badge-receiving {
+  color: #d97706;
+  background: rgba(217, 119, 6, 0.1);
+}
 .badge-completed {
   color: #10b981;
   background: rgba(16, 185, 129, 0.08);

frontend/src/features/orders/views/OrdersView.vue

@@ -51,6 +51,7 @@ const statusTabs = [
   { key: 'pending_handoff', label: '待交接' },
   { key: 'renting', label: '使用中' },
   { key: 'paid', label: '已支付' },
+  { key: 'receiving', label: '接待中' },
   { key: 'pending_checkout_confirm', label: '待结账' },
   { key: 'completed', label: '已完成' },
   { key: 'cancelled', label: '已取消' },
@@ -844,6 +845,11 @@ function bizTypeLabel(bizType: BizType) {
   color: #059669;
 }
 
+.crash-status.receiving {
+  background: #fff7ed;
+  color: #d97706;
+}
+
 .crash-status.completed {
   background: #eff6ff;
   color: #2563eb;