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/settings/PlaybackControlsSettings.tsx

@@ -273,7 +273,10 @@ export const PlaybackControlsSettings: React.FC = () => {
 
         <ListItem
           title={t("home.settings.other.max_auto_play_episode_count")}
-          disabled={!settings.autoPlayNextEpisode}
+          disabled={
+            !settings.autoPlayNextEpisode ||
+            pluginSettings?.maxAutoPlayEpisodeCount?.locked
+          }
         >
           <PlatformDropdown
             groups={autoPlayEpisodeOptions}