- Season cards (show page) gain a hover Play overlay, a clickable title, a quick
watched/unwatched toggle (whole season) and an add-whole-season-to-playlist button.
- Episode cards gain a hover watched/unwatched quick toggle (single episode) — in the
season page and the search Episodes section.
- Series show + season pages now use the same glassy HTPC look as the movie info page:
a faint fixed art backdrop + a customize menu (toggle the backdrop / hide the cast
row), factored into a shared lib/plexDetailUi (useDetailPrefs / useArtBackdrop /
DetailCustomizeMenu), reusing the movie info prefs (plexInfoArtBg/plexInfoCast) so the
toggle state is consistent across movies and series.
