New Features

1. Sleep Timer: Added a sleep timer function that automatically pauses playback after a set countdown. Path: Bottom-right "..." button -> Sleep Timer
2. Spectrum Refresh Interval: Added a configurable spectrum refresh interval (range 10–64 ms). The old "Refresh Speed" option has been removed

Improvements

1. Playback Progress Bar: The playback progress bar now features rounded corners
2. Performance Improvements: Avalonia has been upgraded to 12.1.2, bringing better performance