tahashah123/QuickChat ? reverse-engineered prompt

Build me a simple but polished real time chat app where people can sign up, log in, and start messaging right away.

I want users to be able to send text messages and share images, and for messages to appear instantly without reloading the page. Make the login and signup secure, and keep users signed in properly so the app feels reliable. It should look clean and modern, work well on both desktop and mobile, and be easy to use for someone who just wants to chat with friends.

Please set it up as a full app with a working frontend and backend, and make sure the whole thing actually runs end to end. If you need to check current docs or best practices for anything, go ahead and look them up online.