feat(contracts): implement staff cancellation of contracts with reason and notification

apps/edr-freight-api/src/modules/contracts/contracts.controller.ts

@@ -72,6 +72,7 @@ import {
   RequestChangesDto,
   ResumeContractDto,
   SuspendContractDto,
+  CancelContractByStaffDto,
 } from './dto/approve-step.dto';
 import { SignContractDto } from './dto/sign-contract.dto';
 import { ReviewClearanceDocumentDto } from './dto/review-clearance-document.dto';
@@ -552,6 +553,25 @@ export class ContractsController {
     );
   }
 
+  @Post(':id/staff/cancel')
+  @BookingStaff(FREIGHT_PERMS.contracts.cancel)
+  @ApiOperation({
+    summary:
+      'Staff cancel a contract (terminal — a new contract with the same details may be submitted after)',
+  })
+  cancelByStaff(
+    @Param('id', ParseUUIDPipe) id: string,
+    @Body() dto: CancelContractByStaffDto,
+    @CurrentUser() user: TCurrentUser,
+  ) {
+    return this.transitionService.cancelByStaff(
+      id,
+      dto.reason,
+      resolveAuthUserId(user),
+      user,
+    );
+  }
+
   @Post(':id/approval-steps/:stepId/approve')
   @BookingStaff(FREIGHT_PERMS.contracts.view)
   @ApiOperation({ summary: 'Approve one approval step in sequence' })