shlyncl01/Kanang-Alalay ? reverse-engineered prompt

Build me a simple full stack app for web and mobile, with a backend that handles the data and the main screens working end to end.

I want the project organized so the frontend, backend, mobile app, and routes all fit together cleanly, and the app feels polished and usable on both desktop and phone. Please create the core user flow, basic navigation, and whatever pages or screens make sense for a starter app like this, then wire them up to the backend so the app actually works instead of being just a mockup.

Keep the UI clean and modern, and make sure the code is easy to run and extend. If you need to check current docs or best practices for anything, go ahead and look them up online. Also make sure the setup is straightforward so I can start it locally without a lot of extra steps.