优化结构

internal/biz/system/media.go

@@ -110,10 +110,12 @@ func (uc *MediaUsecase) Upload(ctx context.Context, userID uint, name, suppliedM
 	if save {
 		count, countErr := uc.MediaKeyReferences(ctx, key)
 		if countErr != nil {
+			_ = uc.files.Delete(ctx, key)
 			return nil, countErr
 		}
 		if count == 0 {
 			if err = uc.CreateMedia(ctx, media); err != nil {
+				_ = uc.files.Delete(ctx, key)
 				return nil, err
 			}
 		}