Three bugs in the Up Next / playlist SPA transition for music-type videos:
1. Title selector was '.audio-title' (doesn't exist) instead of '.video-title span'
2. Cover image only updated #audioCoverImg — missed when video has a slideshow
3. Slideshow SLIDE_URLS lived in a closed IIFE and couldn't be updated cross-video
Fix: always render both #audioCoverImg and #slideshowWrap in the DOM (toggle
display via inline style), hoist slideshow state variables outside the if-block,
and expose window._audioPlayerUpdate(d) that both recTransitionTo and
plTransitionTo call. The hook handles all cases: cover-to-cover, cover-to-slideshow,
slideshow-to-cover, slideshow-to-slideshow.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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