修复上传minio路径错误

service/video/concat_service.go

@@ -130,7 +130,7 @@ func (s *concatService) Concat(ctx context.Context, req *ConcatReq) (res *Concat
 
 	// 如果需要上传到 MinIO（用独立 context，避免 HTTP 断开后 ctx 被取消）
 	if req.Upload {
-		uploadCtx := context.Background()
+		uploadCtx := context.WithValue(context.Background(), "user", getUserFromCtx(ctx))
 		uploadRes, uploadErr := s.UploadToMinIO(uploadCtx, outputPath)
 		if uploadErr != nil {
 			return nil, fmt.Errorf("上传到MinIO失败: %v", uploadErr)