divyanshakya966/SmartCampus ? reverse-engineered prompt

Build me a campus community web app called SmartCampus that feels simple and easy to use.

I want students to be able to sign in with Google or email, create a profile, browse and post marketplace listings, view product or item pages, and see public profile info synced across the app. It should also include real time chat so people can message each other directly, and if you need it, look up the current docs online for Firebase and Socket.IO so the setup is done right.

Make it a clean modern web app with a polished student friendly UI, and include the basic pages and flows needed to actually use it end to end. If anything needs a small backend or separate chat server, set that up too so the app works smoothly in development and production.