修复用户发布下架后审核还有的bug

backend/internal/modules/listing/service.go

@@ -266,9 +266,9 @@ func (s *Service) Reject(id uint64, req ReviewRequest) (*ListingDTO, error) {
 	return s.repo.Reject(id, req)
 }
 
-func (s *Service) Offline(ownerID uint64, id uint64) error {
+func (s *Service) Offline(ownerID uint64, id uint64) (*ListingDTO, error) {
 	if s.repo == nil {
-		return ErrDependencyUnavailable
+		return nil, ErrDependencyUnavailable
 	}
 	return s.repo.Offline(ownerID, id)
 }