OPENAI_API_KEY= OPENAI_MODEL=gpt-4.1-mini BACKEND_HOST=0.0.0.0 BACKEND_PORT=8000 FRONTEND_PORT=3000 FRONTEND_URL=http://localhost:3000 NEXT_PUBLIC_API_BASE_URL=http://localhost:8000/api DATABASE_URL=sqlite:///./backend/data/agent.db USE_REAL_DEEPAGENTS=false