EmbarkXOfficial/spring-boot-course ? reverse-engineered prompt

Build me a full eCommerce app from this course repo, with a Spring Boot backend and a simple frontend for shopping. I want users to be able to browse products, search and filter items, view product details, manage a cart, and place orders. Include the usual store basics like categories, product images, user login, and an admin side for adding and editing products, inventory, and orders.

Please wire up the backend cleanly, make the frontend look modern and easy to use, and set it up so I can run everything locally without a lot of manual work. If there are API endpoints, make them easy to test with Postman too. Use the code and folders in the repo as the starting point, and if you need current docs for any libraries or tools, look them up online.