export flow and fix intercity issue

packages/types/src/freight/contracts.ts

@@ -999,6 +999,8 @@ export interface CreateBookingUnderContractDto {
   paymentCurrency?: string;
   /** Binding shipment day. Omitted for intercity (DOMESTIC) bookings — staff assign a passing train later. */
   scheduledDate?: string;
+  /** EXPORT rail only: the train (schedule id) picked from GET /bookings/:id/export-trains. */
+  trainScheduleId?: string;
   /** "WITH_RETURN" | "WITHOUT_RETURN" — per-shipment override; falls back to the contract's equipment return. */
   equipmentReturn?: string;
   containers?: CreateBookingContainerLineDto[];