Function markCompleted

web-build/src/progress.ts:26–30

(chapterId: string, lessonId: string)

}

export function markCompleted(chapterId: string, lessonId: string) {
  const progress = getProgress();
  progress.add(`${chapterId}/${lessonId}`);
  saveProgress(progress);
}

// ── Draft persistence ─────────────────────────────────────────────────