ResoCoder/flutter-tdd-clean-architecture-course ? reverse-engineered prompt

Build me a Flutter app using clean architecture and test driven development, following a simple layered setup with separate data, domain, and presentation concerns.

I want a working starter project that shows how to structure the app the right way, with clear separation of responsibilities, easy to test code, and a sample feature that proves the pattern works end to end. Please include the app screens, state handling, and tests needed to demonstrate the flow, and keep the code organized so it would be easy to expand into a real app later.

Use the existing Flutter project setup, and if you need to check anything current or best practice, look up the latest docs online. Keep it practical and beginner friendly, since this is meant to be a clean example I can learn from and build on.