IrfanSaeednarejo/CampusNexus ? reverse-engineered prompt

Build me a full campus management web app called CampusNexus with a modern dark look and a clean student portal feel.

I want students, mentors, society heads, and admins to each have their own sign in flow and dashboard, with the right features showing up for each role. Students should be able to see events, join societies, track academic tasks, save notes and documents, message people, and get notifications. Mentors should have a way to list themselves, get booked, see feedback, and track earnings. Society heads should be able to create and manage events, see basic activity stats, and collect feedback. Admins should have a control panel for users, moderation, support, and analytics.

Please build the frontend and backend together, with a solid API, authentication, role based access, database models, and real time chat or notifications. Use a polished responsive UI, make the app feel professional, and if you need current package or library details, look them up online before wiring things up.