Implement client-side validation for container and bul

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

@@ -2503,6 +2503,32 @@ export class BookingBatchService implements OnModuleInit {
     }
   }
 
+  /**
+   * A reservation on this schedule still has time left to pay.
+   *
+   * The PAYMENT phase ends a hair BEFORE its own reservations do: `paymentPhaseEndsAt`
+   * is stamped when the phase starts, then `reserve()` gives each booking
+   * `now + paymentWindow` a few hundred milliseconds later, one booking at a time. So
+   * the first settle after the phase deadline finds every reservation still in date,
+   * expires nothing, reports `anySettled = false`, runs no top-up — and the caller
+   * concludes the cycle out from under customers who still had time to pay. The next
+   * tick then expires them with no cycle left to promote the waiting list into.
+   *
+   * Callers must not conclude the cycle while this returns true.
+   */
+  async hasLiveReservations(scheduleId: string): Promise<boolean> {
+    const reserved =
+      await this.bookingsRepository.findReservedForSchedule(scheduleId);
+    const now = Date.now();
+    return reserved.some(
+      (b) =>
+        b.paymentStatus !== "PAID" &&
+        b.status !== "PAID" &&
+        b.paymentDeadline != null &&
+        b.paymentDeadline.getTime() > now,
+    );
+  }
+
   /** No wagon slots left for allocated + reserved bookings. */
   async isScheduleFull(scheduleId: string): Promise<boolean> {
     const schedule =