UnigramDev/Unigram/playback-shuffle • 90167bf • 3 files, +215/-36 Implement shuffle The button exist

UnigramDev/Unigram/playback-shuffle • 90167bf • 3 files, +215/-36
Implement shuffle

The button existed in two places and set IsReversed, since shuffle itself
was never written. It now walks a fixed shuffled order, so Previous goes
back to what was actually heard, and pages loaded later are folded into
the part not yet played.

Paging is measured against the playlist rather than the order being
walked, which shuffle reaches the ends of in no particular order.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

#unigram