Replace adapter-based chat relay with lightweight claude CLI streaming
endpoint. CEO responses now arrive in 2-5s instead of minutes.
Key changes:
- POST /agents/:id/chat/stream — spawns claude -p directly, SSE streaming
- POST /agents/:id/chat/canned — persist welcome/approval messages
- POST /agents/:id/chat/generate-artifact — background doc generation
- Server-side detectArtifactCommitments() replaces unreliable AI observer
- Frontend: optimistic user messages, typewriter streaming, observer events
- Onboarding: separated name/mission substeps, back navigation
- Dev script: full server restart + fresh company + mission setup
- Removed: canned responses, heartbeat polling, inline plan detection
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
