The faint HTPC art backdrop now slowly cross-dissolves through a pool of images
instead of showing one static art — the last E5 sprint.
- useCrossfadeBackdrop (replaces useArtBackdrop): a double buffer — the SETTLED
image lives on #root's background (the proven full-viewport layer); the next
image cross-fades in on a z-index:-1 overlay layer, then is committed and the
overlay reset. ⭐ #root is given `isolation: isolate` so it's a stacking context
— without it the z:-1 overlay paints BEHIND #root's own background and is
invisible (found + fixed live: a red test layer + a real TMDB backdrop both
only showed once #root was isolated).
- Art pool: the item's own art + its TMDB backdrops (E5 S2, rendered straight
from the TMDB CDN — the CSP allows it) + its collection siblings' art; the show
page adds related art; the PERSON page cross-dissolves through the person's
films' art (the roadmap's signature touch).
- HARD-OFF under prefers-reduced-motion (static, no overlay) + a new usePref
"Crossfade backdrop" toggle in the detail customize menu (fade 1.6s / 7s cycle).
Wired into PlexInfo, PlexShowView, PlexSeasonView, PlexPersonView. Tests:
plexBackdrop.dom.test.tsx (5: paint+isolate+overlay, reduced-motion off, single
image, animate=false, disable/unmount cleanup). Browser-E2E'd (isolation +
overlay render + a real backdrop crossfade + the toggle). Gate: vitest 347,
backend lane 403 (unchanged — FE only).
▶ E5 · Plex Experience epic COMPLETE (S1–S8).
peter
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