feat(warehouse): Batch 7 — Import Arrive Queue (arrived import trains, read-only)

- SchedulingReadFacade: importArriveQueue() + importTrainDetail() — read-only SELECTs only,
  direction derived from origin/destination station countries (route-based), so EXPORT/DOMESTIC
  trains are excluded. Per-train booking/container/cargo counts.
- GET /warehouse-inventory/import/arrive-queue + /import/trains/:scheduleId/items
- Import tab restructured into sub-tabs: Arrive Queue (implemented) / Unloaded Queue /
  Dispatch Queue (placeholders for next batch)
- ImportArriveQueueTab: train table (schedule id, train #, route, origin, destination, arrival,
  bookings/containers/cargoes, status) with Open (expandable assigned-items detail) + Auto Unload
  (reuses existing per-booking unload endpoint over the train's bookings)
- Batch7TestDataSeeder: 1 arrived IMPORT train (SEED-IMP-001) + 1 arrived EXPORT train
  (SEED-EXP-001, proves exclusion); idempotent
- Train schedule service logic untouched (facade is SELECT-only)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/edr-freight-web/backoffice/src/hooks/useWarehouses.ts

@@ -227,6 +227,24 @@ export function useLoadedExport(enabled = true) {
 export const useBulkDispatchExport = () =>
   useInventoryMutation((inventoryIds: string[]) => warehouseService.bulkDispatchExport(inventoryIds));
 
+/** Arrived IMPORT trains (route-derived). Read-only. */
+export function useImportArriveQueue(enabled = true) {
+  return useQuery({
+    queryKey: ['warehouse-inventory', 'import-arrive-queue'],
+    queryFn: () => warehouseService.importArriveQueue().then((r) => r.data),
+    enabled,
+  });
+}
+
+/** Assigned bookings/items for an arrived import train. Read-only. */
+export function useImportTrainItems(scheduleId?: string) {
+  return useQuery({
+    queryKey: ['warehouse-inventory', 'import-train-items', scheduleId],
+    queryFn: () => warehouseService.importTrainItems(scheduleId as string).then((r) => r.data),
+    enabled: Boolean(scheduleId),
+  });
+}
+
 // ── Loading (Batch 3) ────────────────────────────────────────────────────────
 
 export function useLoadableWagons(enabled = true) {