Merge origin/develop into refactor-chromecast

Bring 323 commits of develop (incl. the Expo SDK 56 / TV-branch work) into
the chromecast refactor. Conflict resolutions:

- chapters: take develop's reviewed version (ChapterList/ChapterTicks/
  chapters.ts/test) — adds chapterNameAt, markers API, themed Colors.
- auto-skip: keep chromecast's unified useSegmentSkipper for the phone
  player; restore develop's useCreditSkipper/useIntroSkipper (deleted on
  chromecast) so develop's Controls.tv.tsx compiles. TV->useSegmentSkipper
  migration left as follow-up.
- en.json: union the two player blocks (kept chromecast casting keys +
  develop's subtitle/playback keys).
- TechnicalInfoOverlay/PlatformDropdown: take develop's TV-safe versions
  (kept chromecast's disabled-prop branch, aliased to avoid shadowing the
  @expo/ui disabled modifier).
- SDK 56 fixes: expo-router Router -> ImperativeRouter in cast components;
  ChapterTicks markers API in CastPlayerProgressBar.
- restore utils/profiles/chromecast* (deleted on chromecast, still used by
  PlayButton).

Typecheck passes; bun.lock regenerated against merged package.json.

components/item/ItemPeopleSections.tsx

@@ -37,7 +37,20 @@ export const ItemPeopleSections: React.FC<Props> = ({ item, ...props }) => {
     return { ...item, People: people } as BaseItemDto;
   }, [item, people]);
 
-  const topPeople = useMemo(() => people.slice(0, 3), [people]);
+  // Jellyfin can list the same person several times (e.g. an actor also
+  // credited as writer). Dedupe by Id so the same actor section isn't rendered
+  // twice and we still surface 3 distinct people.
+  const topPeople = useMemo(() => {
+    const seen = new Set<string>();
+    const unique: BaseItemPerson[] = [];
+    for (const person of people) {
+      if (!person.Id || seen.has(person.Id)) continue;
+      seen.add(person.Id);
+      unique.push(person);
+      if (unique.length >= 3) break;
+    }
+    return unique;
+  }, [people]);
 
   const renderActorSection = useCallback(
     (person: BaseItemPerson, idx: number, total: number) => {