Delete the corresponding song file within the application.

Because I am a heavy gamer and also a self-made score composer, due to the different update progress of the music packs provided by different authors, there are often duplicate music imports. I hope that a long press music deletion function can be added to the game UI, which will be very helpful for me to organize game files! Thank you very much!

Look for the UI code handling music file management and long-press interactions. Identify where song files are stored and loaded. Implement a deletion function that removes both the UI entry and the corresponding file from the application's data directory.

Escrito por el modelo de indexación a partir del texto del issue.