rutujasawale10/studysync-mern ? reverse-engineered prompt

Build me a student study group app where college students can sign up, log in, and browse study circles by subject. They should be able to create a group, set a meeting time and link, choose a max number of members, and automatically become the creator. Other students can search and filter groups, join open ones, and see when a group is full so they can’t join again or overfill it.

I also want a group detail page that shows the members, their department and semester, the meeting info, and a shared notes area that the group leader can edit. Please make it feel clean and responsive, with a simple dashboard style that works well on desktop and mobile. Use a modern React frontend and a Node and Express backend with MongoDB for storage, plus secure login with JWT. Include demo data if that helps for testing, and set it up so I can run it locally easily.