## Summary
- Add custom assistant-message rendering for Nova connector tool results
- Show integration-style setup/status cards with icon, status pill, setup steps, docs links, copy buttons, and key reveal/generate action
- Keep plugin API keys client-side only by calling the existing `/v3/auth/key?client=...` endpoint from the UI
- Add Nova empty-state suggestions for Cursor setup and active plugins
- Added attachment draft/shared types and validation in components/chat/attachments.ts.
- Added paperclip upload UI to Nova composer with file chips, size/status, remove, retry, and per-file Save / Chat only toggle.
- Wired uploads before send to /chat/attachments, then sends returned attachment references in chat message metadata.
- Preserved attachment metadata when loading threads and rendered attachment chips on user messages.
- Added attachment support from the home composer into the full chat view.
- Extended chat analytics with attachment counts.
<img width="1905" height="900" alt="image" src="https://github.com/user-attachments/assets/631001b8-7c68-4015-b36b-06c69cdad271" />
<img width="1323" height="1600" alt="image" src="https://github.com/user-attachments/assets/77eee08a-b235-41eb-b03a-f406b81b46e7" />
- ensured responsiveness
