LearnTube 0.28.4

LearnTube 0.28.4 — Initial Release New Learning Features: - Learning Paths Dashboard: progress bars per playlist, stats header with weekly study hours - Watch Progress Tracking: mark videos watched/unwatched, bulk mark all/reset - Timestamped Notes: save notes during playback, tap to seek back - Learning Streak & Study Time: daily streak, today/week/all-time study hours, activity calendar Based on NewPipe 0.28.4.