- Add llm_client.py for Kimi API integration with RAG and streaming support
- Add Agent API endpoints: query, command, suggest
- Add Provenance API for relation source tracking
- Add Entity details API with mentions and relations
- Add Entity evolution analysis API
- Update workbench.html with Agent panel, entity cards, provenance modal
- Update app.js with Agent chat, entity hover cards, relation provenance
- Add low-confidence entity highlighting
- Update STATUS.md with Phase 4 progress