✅ fix: Parse Letta response format correctly
Letta API response structure:
- messages[].message_type === 'assistant_message' (not role)
- messages[].content is direct string (not nested)
UI now displays Letta agent responses correctly!
Phase 4 COMPLETE: Full Letta integration working end-to-end
- Agent selection ✅
- Message interception ✅
- API calls ✅
- Response display ✅
Next: Add streaming support
🐾 Generated with [Letta Code](https://letta.com)
Co-Authored-By: Letta <noreply@letta.com>