yuvraj24/WhatsApp-Clone — reverse-engineered prompt

Build me a WhatsApp style chat app that works on Android, iOS, and the web. I want a mobile app plus a WhatsApp Web style site, all connected to the same backend.

Users should be able to send instant one to one text messages, see when someone is online or offline, see last seen time, and get unread message counts. Add a status feature like stories, where people can post status updates, view multiple statuses, and see progress while viewing them. The web version should support logging in by scanning a QR code from the mobile app, then show real time chats and statuses.

Use the same general stack this kind of app needs, React Native for mobile, React for web, Node and Express for the server, MongoDB for data, and sockets for live updates. Please wire everything together so it can run locally, include clear setup steps, and look up current docs online if needed.