cd backend
python -m venv .venv
# Windows: .venv\Scripts\activate
# macOS/Linux: source .venv/bin/activate

pip install -r requirements.txt
uvicorn app:app --reload --port 8787 --host 0.0.0.0

cd frontend
python -m http.server 9999 --bind 0.0.0.0
# open on phone: http://<your-computer-LAN-IP>:9999