dhannzy69/online-shopping-order-system ? reverse-engineered prompt

Build me a simple online shopping order system with a frontend and backend that work together.

I want a clean React app for the user side, and a Spring Boot backend that handles the data and business logic. The app should let people browse items, view product details, add things to a cart, and place an order. It should also show order status or order history so users can see what they bought.

Please make it feel like a real working demo, with a decent looking interface and basic form validation. Use sensible sample data if needed so I can run it and see everything working right away. If anything is unclear, look up the current docs online if you need to and keep the setup easy to run locally.