Since the last devlog, I added the trainer system for study characters. The backend now supports listing characters, fetching random practice sets, submitting character answers, and tracking each user’s trainer progress.

I also seeded the first batch of hiragana, katakana, and a few kanji so the trainer has real content to work with. On top of that, I wired the new trainer and progress routes into the app and fixed a few implementation issues around model names, async handling, and boolean values.