- Fix black episode thumbnails in the Next Up / Continue Watching rows:
build the parent Thumb URL from the matched ParentThumbItemId +
ParentThumbImageTag pair, instead of pairing ParentBackdropItemId with
the thumb tag (different parent -> 404 -> black). Fixed on mobile
(ContinueWatchingPoster) and TV (TVPosterCard, TVHeroCarousel).
- Add a "Use episode images for Next Up & Continue Watching" setting
(default off = series image, matching Jellyfin), wired into the home
rows on mobile and TV.
- Add helper descriptions under the Appearance settings rows.