- Add useIdlePreviewPlayback composable: stops preview videos after 30s
without input and restarts them staggered on activity; also stops
while the tab is hidden.
- SeriesFullView: no episode videos play until a season is browsed
(keyboard/gamepad focus or mouse hover); only near-viewport tiles of
the active season play (IntersectionObserver); inactive seasons no
longer preload video data; sync is incremental so playing tiles are
not rewound on scroll.
- MediaDetail: header showreel videos use cancellable stagger timers,
pause when scrolled out of view, and honor the idle stop.
- Images: lazy/async decoding on series page posters; content-visibility:
auto on media cards to skip rendering off-screen row items.
LeoVasanko
258fc79753