[Feature Request] Add Crossfade (5-10s) between tracks

[Kaezoo26]

Hello,

I would like to suggest a new feature for OpenTune: the integration of a crossfade (audio overlap) option.

Context:

Currently, there is a silent gap between tracks. To improve the user experience and ensure continuous playback, it would be great to have a transition where the next track starts fading in while the current one fades out.

Proposed Solution:

Add a toggle in the settings to enable/disable Crossfade.
Include a slider to adjust the duration of the overlap (ideally between 5 and 10 seconds).

Why this is useful:

This would provide a much smoother listening experience, especially for gapless albums or background music, making the player feel more professional and polished.

Thank you for your hard work on this project!