usmanali56/watch-mern-project ? reverse-engineered prompt

Build me a simple online watch store app for browsing and buying watches.

I want a clean storefront where people can see a list of watches, open a watch to view details, search or filter through products, and add items to a cart. Include a basic checkout flow so it feels like a real store, even if payment is just a mock step for now. Make the design modern and easy to use on both desktop and mobile.

Set it up as a full app with a frontend and backend, since this repo already has separate app folders. Save product data in a database, and make sure the app can load the watches from the backend instead of hardcoding everything. If anything is unclear, use sensible defaults and keep it simple. If you need current docs or examples for any libraries, look them up online first.