THANUJ-IMAYAVARAMBAN31/class-attendance ? reverse-engineered prompt

Build me a class attendance web app for a school or college, where students can register, wait for approval, then log in and see their own profile, QR code, and attendance history. I want a Head account that can approve or reject student requests, create classes by department with date and time, and view who was present, absent, and how long each student stayed. I also want a Security account that can open a webcam scanner and scan student QR codes to mark entry and exit, with the first scan saving in time and the second scan saving out time automatically. Make sure access is role based, routes are protected, and passwords are stored safely. Use a clean modern interface for the dashboard and landing page, and if you need to check anything current while building, look up the latest docs online.