approve-delivery exit-gate fix + Import Loading Confirmation frontend panel — done this session, not yet committed

apps/edr-freight-api/src/modules/train-scheduling/train-scheduling.service.ts

@@ -3257,6 +3257,53 @@ export class TrainSchedulingService {
     return days.includes(day);
   }
 
+  /**
+   * Enforce the config-driven booking window at booking-create time.
+   *
+   * A booking is only allowed when the route has an OPEN departure the customer
+   * can join for the requested day — which, because the window engine keeps
+   * `bookingWindowStatus === 'OPEN'` in lockstep with the live window, means:
+   *  - IMPORT: the day's window is currently open (opens at `windowOpenHour` EAT,
+   *    `importWindowLeadDays` before departure, for `windowDurationHours`).
+   *  - EXPORT: now is within `exportBookingLeadHours` before that departure (FCFS).
+   *
+   * `getBookableScheduleEntities` filters on `bookingWindowStatus === 'OPEN'`, so
+   * both gates are satisfied by checking that route for open departures. When a
+   * specific day is requested, require an open departure on that EAT day; when no
+   * day is given, require at least one open departure on the route at all.
+   * Throws `BadRequestException` when the window is closed. No-ops when the route
+   * yards are unknown (nothing to gate against).
+   */
+  async assertBookingWindowOpen(input: {
+    originYardId?: string | null;
+    destinationYardId?: string | null;
+    scheduledDate?: Date | string | null;
+    direction?: string | null;
+  }): Promise<void> {
+    const { originYardId, destinationYardId } = input;
+    if (!originYardId || !destinationYardId) return;
+
+    const { days } = await this.getAvailableDays(originYardId, destinationYardId);
+    if (days.length === 0) {
+      throw new BadRequestException(
+        input.direction === 'EXPORT'
+          ? 'The export booking window for this route is not open yet'
+          : 'The import booking window for this route is closed right now',
+      );
+    }
+
+    if (input.scheduledDate) {
+      const day = eatDay(new Date(input.scheduledDate));
+      if (!days.includes(day)) {
+        throw new BadRequestException(
+          input.direction === 'EXPORT'
+            ? 'No departure is within the export booking window on the selected day'
+            : 'The import booking window is not open for the selected day',
+        );
+      }
+    }
+  }
+
   private async mapScheduleDetail(
     schedule: import('../train-schedules/entities/train-schedule.entity').TrainSchedule,
   ) {