- Add GET /videos/{video}/player-data JSON endpoint returning stream URL,
cover, slides, title, duration (used by client-side SPA transitions)
- Replace music playlist JS with full SPA system: plTransitionTo() swaps
audio.src in-place (preserving browser autoplay permission), updates
cover art, resets progress bar, then background-fetches the new page
to swap #vdbWrap (description) and #ytcSection (comments) via DOMParser
- plSwapContent() re-runs the YTC comments IIFE after swapping innerHTML
so comments load correctly for the new video
- Prev/next/shuffle/loop/autoplay controls now computed dynamically from
PL_VIDEOS array — buttons stay correct after each SPA transition
- Sidebar shows ALL playlist tracks (removed @if filter); current track
highlighted in red; clicking any card triggers SPA transition
- Browser back/forward handled via popstate + history.pushState
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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