- Efficiency: cap each person section at _PERSON_SECTION_MAX (200) so a prolific person can't
return an unbounded list the client mounts a card per row for.
- Reuse: extract the optimistic watch-toggle (flip → persist → resync) into a shared
toggleWatchState helper; the grid and the person page each supply their own cache updater.
- Correctness (scroll): onOpenPerson now stashes infoScrollRef ONLY when leaving an info page
(not from a show/grid context), and a jumped-to info page resets it — so a stale offset can't
wrongly restore a fresh info page.
- Test-coverage: add PlexPersonView.dom.test.tsx (export CastStrip + PlexPersonView) covering
the cast-row rewiring (open-person vs filter fallback) and the person page's sections + filter
+ empty state.
The name-as-identity finding is inherent to Plex cast carrying no per-person id (PlexPerson is
name-keyed too); documented in the endpoint docstring, not structurally fixable in S4.
peter
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