bytebandit-07/NotifySync ? reverse-engineered prompt

Build me a clean Flutter app called NotifySync that works nicely on phone, web, and desktop.

I just want a solid starter app with a polished first screen, simple navigation, and a layout that looks good on different screen sizes. Keep it lightweight and easy to understand, but make it feel like a real product instead of a blank template. Add a basic empty state or sample content so the app doesn’t feel unfinished, and make sure the app launches without errors on the supported platforms.

Please set it up so it’s easy to extend later, with sensible organization and a simple visual style. If anything about Flutter setup or current best practices matters, look up the latest docs online and use those.