export flow and fix intercity issue

apps/edr-freight-web/backoffice/src/services/api.ts

@@ -1,4 +1,4 @@
-import type { PaginatedResponse } from "@edr/types";
+import type { Freight, PaginatedResponse } from "@edr/types";
 
 import { QUERY_KEYS } from "@/constants/QUERY_KEYS";
 import type { FleetResourceSlug } from "@/pages/fleet/config/resources";
@@ -438,6 +438,31 @@ export const api = {
       ],
     ),
 
+    exportTrains: endpoint<
+      {
+        bookingId: string;
+        date: string;
+        cargo?: {
+          containerSizes?: string[];
+          cargoTypeCode?: string;
+          wagons?: number;
+        };
+      },
+      Freight.ExportTrainOption[]
+    >(
+      "train-scheduling",
+      "export-trains",
+      ({ bookingId, date, cargo }) =>
+        trainSchedulingService.getExportTrains(bookingId, date, cargo),
+      ({ bookingId, date, cargo }) => [
+        ...QUERY_KEYS.TRAIN_SCHEDULING.ROOT,
+        "export-trains",
+        bookingId,
+        date,
+        JSON.stringify(cargo ?? {}),
+      ],
+    ),
+
     trainTrack: endpoint<{ id: string }, TrainTrackResponse>(
       "train-scheduling",
       "track",