ENGLISH·COURSE API
    Preparing search index...
    ModuleRouteReading: { isRead: false } | { isRead: true; route: ModuleRoute }

    The learner's route through a module, or the fact that it cannot be known yet.

    isRead: false means the browser has not read stored progress and the continue-watching record yet — the server render and the first client frame. It is not the same as "nothing watched", which is isRead: true with no finished steps.