pontig/cdd_legrigne — reverse-engineered prompt

I want this turned into a working full stack TypeScript app, not just a scaffold. There’s a frontend and backend here already, so please wire everything together end to end and fill in whatever is missing so I can run it locally and actually use it.

Keep it simple and practical. Give me a basic web interface, a backend API, and persistence for the main data so changes survive restarts. Add sensible validation, error handling, and a clean happy path for the core flow. If there are half finished pieces in the repo, use those instead of reinventing things.

I also want this to be easy to deploy on a Raspberry Pi since there’s already deployment related stuff in the project. Please make sure the app can be built, configured, and started cleanly in that environment, and update any setup docs I’d need to follow. If you need missing details, use reasonable defaults and look up current docs online if needed.