zukhriddin5/riza-ecommerce — reverse-engineered prompt

Build me a private ecommerce site for Riza where customers have to sign in before they can shop. I want it to feel like a clean modern online store, with a home page, product listings, product detail pages, a cart, and a simple checkout flow where the customer can place an order.

Use the existing Next.js app and whatever database and auth setup is already in the project. If some parts are started already, finish them instead of replacing everything. Please make the site look polished on mobile and desktop, with nice product cards, images, prices, quantity controls, empty states, loading states, and clear error messages.

Add a basic owner side too if it fits the current project, so products and orders can be managed without touching the database directly. Keep the code clean and easy for me to keep working on later. Look up current docs online if you need to.