tpriyanshu60commits/Mitra---Real-Time-Chat-Application ? reverse-engineered prompt

Build me a real time chat app where people can sign up, log in, and start messaging each other instantly. I want one to one chats with messages appearing right away, a clear list of who is online, and chat history that stays saved so users can come back later and see old conversations.

Make the app feel clean and simple, with a basic modern chat layout, a sidebar for contacts or conversations, and a main area for messages. Add secure authentication so users stay logged in safely, and make sure only signed in users can use the chat. If you need to check current docs or best practices for the libraries involved, go ahead and look them up.

Please build both the frontend and backend so it all works together, and make sure the app is ready to run locally without a lot of extra setup.