优化申诉仲裁流程和证据展示

backend/internal/modules/dispute/service.go

@@ -11,6 +11,7 @@ var (
 	ErrInvalidDispute        = errors.New("invalid dispute")
 	ErrDisputeExists         = errors.New("dispute already exists")
 	ErrDisputeCannotHandle   = errors.New("dispute cannot handle")
+	ErrDisputeCannotCancel   = errors.New("dispute cannot cancel")
 )
 
 type Service struct {
@@ -45,6 +46,26 @@ func (s *Service) FindForUser(ctx context.Context, userID uint64, id uint64) (*D
 	return s.repo.FindForUser(ctx, userID, id)
 }
 
+func (s *Service) Cancel(ctx context.Context, userID uint64, id uint64) (*DisputeDTO, error) {
+	if s.repo == nil {
+		return nil, ErrDependencyUnavailable
+	}
+	if id == 0 {
+		return nil, ErrInvalidDispute
+	}
+	return s.repo.Cancel(ctx, userID, id)
+}
+
+func (s *Service) CancelByOrder(ctx context.Context, userID uint64, orderID uint64) (*DisputeDTO, error) {
+	if s.repo == nil {
+		return nil, ErrDependencyUnavailable
+	}
+	if orderID == 0 {
+		return nil, ErrInvalidDispute
+	}
+	return s.repo.CancelByOrder(ctx, userID, orderID)
+}
+
 func (s *Service) ListAdmin(ctx context.Context, page, pageSize int) (*PaginatedResult, error) {
 	if s.repo == nil {
 		return nil, ErrDependencyUnavailable