优化结构

internal/biz/system/media.go

@@ -21,6 +21,25 @@ type MediaRepo interface {
 	UploadRepo
 }
 
+type StoredFile struct {
+	Name         string
+	Path         string
+	URL          string
+	Size         int64
+	LastModified time.Time
+	ContentType  string
+}
+
+// FileStorage owns the persistence boundary for uploaded files.
+type FileStorage interface {
+	Put(context.Context, string, io.Reader) (*StoredFile, error)
+	Open(context.Context, string) (io.ReadCloser, error)
+	Delete(context.Context, string) error
+	Compose(context.Context, []string, string) (*StoredFile, string, error)
+	DeletePrefix(context.Context, string) error
+	List(context.Context, string, string, int) ([]*StoredFile, string, bool, error)
+}
+
 type MediaUsecase struct {
 	MediaRepo
 	files    FileStorage