fix: update CLAUDE.md to reflect Phase 4 state machine changes
- Replace 'authenticated' step with 'home', 'did_document', and 'recovery_info' in state machine description
- Update step count from 13 to 16 steps
- Add src/lib/components/home/ directory to Components/Exposes section
- List three new home screen components: HomeScreen, DIDDocumentScreen, RecoveryInfoScreen
- Update Key Files section to document the new home components directory