业务更名为撞车并切换crash路由

用户可见文案与页面/API路径改为撞车与crash，保留mohong表与权限码兼容；移动端入口去掉租/撞图标。

backend/internal/modules/payment/mohong_payment.go

@@ -13,7 +13,7 @@ import (
 
 const bizTypeMohongPay = "mohong_pay"
 
-// StartMohong 发起摸大红订单支付。
+// StartMohong 发起撞车订单支付。
 func (r *Repository) StartMohong(ctx context.Context, userID uint64, orderID uint64, req StartPaymentRequest, clientIP string) (*PaymentDTO, error) {
 	req.PayWay = normalizePayWay(req.PayWay)
 	defaultConfig, err := r.defaultRuntimeConfig(ctx, req.PayWay)
@@ -73,7 +73,7 @@ func (r *Repository) StartMohong(ctx context.Context, userID uint64, orderID uin
 		NotifyURL:    runtimeConfig.NotifyURL,
 		JumpURL:      runtimeConfig.JumpURL,
 		ClientIP:     clientIP,
-		Body:         "摸大红订单 " + orderRow.OrderNo,
+		Body:         "撞车订单 " + orderRow.OrderNo,
 		Attach:       orderRow.OrderNo,
 	})
 	if err != nil {
@@ -202,7 +202,7 @@ func newMohongPayment(row model.MohongOrder, req StartPaymentRequest, runtimeCon
 	return payment, nil
 }
 
-// QueryMohong 查询摸大红订单支付状态。
+// QueryMohong 查询撞车订单支付状态。
 func (r *Repository) QueryMohong(ctx context.Context, userID uint64, orderID uint64) (*PaymentDTO, error) {
 	var payment model.PaymentOrder
 	if err := r.db.WithContext(ctx).