- plex.py: delete the no-op _enabled() (never wired as a Depends/called; the real
gate is sysconfig plex_enabled).
- PlexBrowse.tsx: collapse toggleEpisodeWatched into toggleWatched — they were
byte-identical (both take a PlexCard).
- Delete 6 dead plex.json keys (loadMore, playerSoon, filter.library,
playlist.up/down/remove) from en/hu/de — verified 0 refs (the live
playlist.removeShow/removeSeason keys are kept).
Behavior-neutral. tsc green, ruff clean on touched files, localdev boots, Plex renders.
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