整理model

internal/service/song_svc.go

@@ -1,6 +1,7 @@
 package service
 
 import (
+	"butterfliu/internal/model"
 	"butterfliu/internal/repository"
 )
 
@@ -21,10 +22,10 @@ func (s *SongService) GetAllWithDetails() ([]repository.SongDetail, error) {
 }
 
 // GetMediaFilePath returns the file path of a song by its song ID.
-func (s *SongService) GetMediaFile(id int) (repository.MediaFile, error) {
+func (s *SongService) GetMediaFile(id int) (model.MediaFile, error) {
 	song, err := s.songRepo.Get(id)
 	if err != nil {
-		return repository.MediaFile{}, err
+		return model.MediaFile{}, err
 	}
 	return s.mediaRepo.Get(song.MediaFileID)
 }