feat: full wagon cancel, leg board, wagon dates

feat(freight): editable train leg times, SL invoice payer

apps/edr-freight-api/src/modules/wagons/wagons.service.ts

@@ -121,8 +121,46 @@ export class WagonsService {
    * (yard workspace, coupling pickers) walk the pages client-side — see
    * `wagonService.listAll` in the backoffice.
    */
-  findAll(query: ListWagonsQueryDto = {}): Promise<PaginatedResponse<Wagon>> {
-    return paginateQuery(this.buildListQuery(query), query, { defaultPageSize: 10 });
+  async findAll(query: ListWagonsQueryDto = {}): Promise<PaginatedResponse<Wagon>> {
+    const page = await paginateQuery(this.buildListQuery(query), query, { defaultPageSize: 10 });
+    await this.attachStatusDates(page.items);
+    return page;
+  }
+
+  /**
+   * Latest status-flip dates from the audit log, for the wagons desk columns:
+   * when the wagon last went to MAINTENANCE and when it last became AVAILABLE.
+   * One grouped query per page; null when the log has no such flip.
+   */
+  private async attachStatusDates(wagons: Wagon[]): Promise<void> {
+    if (!wagons.length) return;
+    const rows: Array<{
+      wagonId: string;
+      lastMaintenanceAt: Date | null;
+      lastAvailableAt: Date | null;
+    }> = await this.dataSource
+      .getRepository(WagonStatusLog)
+      .createQueryBuilder('l')
+      .select('l.wagon_id', 'wagonId')
+      .addSelect(
+        `MAX(l.created_at) FILTER (WHERE l.to_status = '${WagonStatus.Maintenance}')`,
+        'lastMaintenanceAt',
+      )
+      .addSelect(
+        `MAX(l.created_at) FILTER (WHERE l.to_status = '${WagonStatus.Available}')`,
+        'lastAvailableAt',
+      )
+      .where('l.wagon_id IN (:...ids)', { ids: wagons.map((w) => w.id) })
+      .groupBy('l.wagon_id')
+      .getRawMany();
+    const byId = new Map(rows.map((r) => [r.wagonId, r]));
+    for (const w of wagons) {
+      const r = byId.get(w.id);
+      Object.assign(w, {
+        lastMaintenanceAt: r?.lastMaintenanceAt ?? null,
+        lastAvailableAt: r?.lastAvailableAt ?? null,
+      });
+    }
   }
 
   async findById(id: string): Promise<Wagon> {