At episode end, when a next item exists and the pref is on, show an up-next
card (poster + title + ~10s countdown + Cancel) instead of the old instant jump,
so binge stays in the viewer's control (D6-A). Countdown or Play now advances;
Cancel/✕ dismisses and stays on the finished frame. Lives only on the
play-to-the-end path — credits-auto-skip advances earlier and never reaches the
card, so the two reconcile by construction (no double-advance). New pref
'upNext' (default on) with a Playback-tab toggle; the card closes on item change
and joins the Back/Escape cascade. i18n HU/EN.
S4a-1 of the PlexPlayer decomposition. Move the module-level pure
helpers (prefs types/defaults, track-language resolution, subtitle
shadow CSS, wall-clock formatting, HLS_SUB_LAG, fmt) to
lib/plexPlayerPrefs.ts and the presentational building blocks
(Ctrl/Slider/Toggle/PanelHead) to plexPlayerControls.tsx. No hooks or
behaviour touched; PlexPlayer.tsx 1889->1661.
peter