docs: add Cursor Cloud dev environment instructions to AGENTS.md

[manit0700]

Summary

Sets up the EvolveAgent AI development environment (backend + frontend) for Cursor Cloud agents and documents non-obvious startup/testing caveats discovered during setup. The only code/repo change is an appended ## Cursor Cloud specific instructions section in AGENTS.md; the dependency install/refresh is handled by the VM startup update script (not committed here).

What was set up

• Backend (FastAPI): Python venv + pip install -r backend/requirements.txt
• Frontend (React + Vite): npm install in frontend/
• Installed the python3.12-venv system package (needed once to create the backend venv)

Verification

Service	Command	Result
Backend tests	cd backend && ./venv/bin/pytest -q	1444 passed, 9 skipped
Frontend tests	cd frontend && npm run test	56 passed
Frontend build	cd frontend && npm run build	built (1609 modules)
Backend run	./venv/bin/uvicorn app.main:app --reload --port 8000	/health ok; POST /api/run returns multi-agent response
Frontend run	npm run dev -- --host 127.0.0.1 --port 5173	serves 200; UI loads

Hello-world task: sent a chat message in Simple Mode Chat and received a multi-agent orchestrated response (mock mode), no errors.

evolveagent_chat_hello_world.mp4

Chat response in EvolveAgent AI

Key notes (also in AGENTS.md)

• App runs fully offline in mock/JSON mode; no .env or API keys required for dev.
• Do NOT copy .env.example to backend/.env before running tests — it sets REDIS_URL/DATABASE_URL and breaks test_default_backend_is_json_and_status (CI runs with these unset).
• Some tests (e.g. business-intelligence) assume a clean backend/app/data/; running the app/suite writes runtime JSON there. Clear with git clean -fdx backend/app/data/ for a pristine baseline. Fresh checkouts/CI are unaffected.

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