Snapchat/Valdi ? reverse-engineered prompt

Build me a small Valdi app that feels like a polished starter project for iOS, Android, and macOS.

I want a simple home screen written in declarative TypeScript with a clean native look, a header, a few tappable cards, and a second screen so I can see navigation working. It should be easy to run, easy to edit, and show off instant hot reload if possible. Please keep it close to the way Valdi likes to work, with native views instead of a web view, and make the example code easy to understand for someone just getting started.

If anything is unclear, look up the current Valdi docs online and follow the recommended setup. Also include a tiny example of shared state or context if that fits naturally, so I can see how data moves through the app.