implement wagon maintenance feature: add functionality to detach wagons and move them to maintenance status

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

@@ -1850,6 +1850,15 @@ export const api = {
       () => TRAIN_BUILDER_INVALIDATIONS,
     ),
 
+    sendWagonToMaintenance: endpoint<{ id: string; wagonId: string }, TrainComposition>(
+      "train-builder",
+      "sendWagonToMaintenance",
+      ({ id, wagonId }) =>
+        trainBuilderService.sendWagonToMaintenance(id, wagonId).then((r) => r.data),
+      undefined,
+      () => TRAIN_BUILDER_INVALIDATIONS,
+    ),
+
     reorderWagons: endpoint<{ id: string; wagonIds: string[] }, TrainComposition>(
       "train-builder",
       "reorderWagons",

apps/edr-freight-web/backoffice/src/services/trainBuilder.service.ts

@@ -129,7 +129,6 @@ export interface BuiltTrainListResponse {
 }
 
 export interface BuildTrainPayload {
-  code: string;
   /** EXPORT run number — odd, unique across trains (e.g. 8001). */
   exportTrainNumber: string;
   /** IMPORT run number — even, unique across trains (e.g. 8002). */
@@ -249,6 +248,9 @@ export const trainBuilderService = {
     apiClient.post<TrainComposition>(`${BASE}/${id}/wagons`, { wagonIds }),
   removeWagon: (id: string, wagonId: string) =>
     apiClient.delete<TrainComposition>(`${BASE}/${id}/wagons/${wagonId}`),
+  /** Detach a wagon and move it to MAINTENANCE status. */
+  sendWagonToMaintenance: (id: string, wagonId: string) =>
+    apiClient.post<TrainComposition>(`${BASE}/${id}/wagons/${wagonId}/maintenance`),
   reorderWagons: (id: string, wagonIds: string[]) =>
     apiClient.post<TrainComposition>(`${BASE}/${id}/reorder-wagons`, { wagonIds }),
   disband: (id: string) => apiClient.delete<void>(`${BASE}/${id}`),