- Practice exercises: AI-generated multiple choice questions, practice mode with score tracking
- Enhanced virtual character: More animations, accessories, AI chat integration, XP system
- Inter-school federation: School leaderboard, team scores, federation competitions
- Enhanced communication: Voice chat, file sharing, note sharing, teacher notes panel
- Added isFederation and federationSchedule fields to Competition model
- 170+ new i18n keys
- All lints pass
