forabi/WebCeph — reverse-engineered prompt

Build me a browser app for orthodontic treatment planning where a user can drop in a cephalogram or patient photo and start tracing right away without creating an account.

The main flow should be simple. The user chooses an analysis, the app guides them through placing the needed points on the image, and it draws the tracing as they go. Measurements should calculate immediately while they work, then show a clear summary and plain language interpretation based on the norms for that analysis.

Everything needs to stay on the user’s own device. Don’t upload images or tracing data to a server. Let the user save or export each tracing so they can keep it on their computer.

It should work in a normal web browser, and after the first visit it should keep working without an internet connection. Use React and TypeScript if that fits the project. Keep the interface clean, fast, and easy enough for someone in a clinic to use without setup.