Dev-Joyson/LevelUP ? reverse-engineered prompt

Build me a simple full stack app with a clean frontend and a backend that talks to it.

I want something polished and usable, with a landing page, a basic way to create, view, edit, and delete items, and a nice responsive interface that works on desktop and mobile. Set up the frontend and backend so they work together smoothly, and make sure the app feels complete, not like a demo.

Use TypeScript throughout, keep the code organized, and wire up whatever API, state, and data flow you think fits best. If you need to check current docs for any library choices or best practices, feel free to look them up online. Please also include a simple way to run the project locally and make sure the main screens and actions are actually working.