fix(player): prevent slider snapping back when seeking while paused

[GadhiyaRaj]

What & why

Prevents the playback slider from snapping back to its old position when dragged and released while paused

Linked issue

Closes #2480

Checklist

• This PR addresses an accepted issue (linked above)
• I wrote or personally reviewed every line of this change
• I tested it on Android and/or Desktop (say which, and how) -> Tested it on Android by playing a song, then pausing it and dragging the playback slider to random positions and then releasing the slider, also tested the general flow of dragging the slider while the song is playing and not paused (tested the same in full-screen video mode)

[maxrave-dev]

Thanks for tracking this down and for the clear repro! We ended up fixing it with a simpler change at the source: while paused, the player handlers stop their progress ticker, so a seek never reached the shared timeline. The handlers now publish the new position on every seek while paused (maxrave-dev/core@5d3fb4c, bumped in c539920), which covers every seek bar plus lyric taps and system media controls with no UI changes. Closing this one, appreciate the contribution!