MetroList: Hide Lyrics Provider Banner for Manually Edited Lyrics

Problem

The lyrics provider banner appeared even when users had manually edited lyrics, creating confusion about the lyrics source. The banner should only show for auto-fetched lyrics.

Solution

Added check for manually edited lyrics state, hiding the provider banner when lyrics have been manually modified.

Result

Provider banner only appears for auto-fetched lyrics, not for manually edited content.

Commit: MetrolistGroup/Metrolist@9cfff7f
PR: #3430