shivamdada1/alternativeto.net ? reverse-engineered prompt

Build me a simple AlternativeTo style app where people can browse apps and find alternatives to them.

I want a clean front end with a search bar, a way to view app details, and a list of similar products for each app. It should feel easy to use on desktop and mobile, with a polished homepage and basic navigation. If it needs a backend, set up whatever is needed so the data can be loaded and updated cleanly.

Please make the whole thing work end to end, and include a few basic tests so I can tell it is wired up correctly. If you need to check current docs or best practices while building, go ahead and look them up online.