sesan-7/shopSphere ? reverse-engineered prompt

Build me a full stack online shop called ShopSphere.

I want customers to be able to sign up, log in, browse products, search and filter items, view product details, add things to the cart, save favorites to a wishlist, apply coupons, and check out. They should also be able to see their past orders and order status.

I also need an admin area where I can add, edit, and remove products, manage inventory, view orders, and handle basic store management from one dashboard.

Make it feel modern and easy to use, with a clean shopping experience on the front end and a solid backend for authentication, products, carts, orders, and coupons. Use the existing client and server setup in the repo, and if you need current docs for any package or best practice, look them up online first.