Core features:
- Multi-agent AI translation pipeline (translator + terminologist + polisher)
- RAG translation memory with Redis HNSW vector search
- 4-level cache architecture (Caffeine → Redis → MySQL → RAG)
- Cache consistency with version stamp, delayed double-delete, Redis pub/sub
- Stripe subscription billing (FREE / PRO / MAX) with webhook idempotency
- Chrome extension (MV3, 3 translation modes)
- React web dashboard + external REST API
- Team collaboration workspace with chapter assignment
- Virtual threads throughout (Java 21)
- 86% instruction / 75% branch test coverage
- GitHub Actions CI/CD pipeline