Souvikkundu0901/coding-arena ? reverse-engineered prompt

Build me a real time 1v1 coding battle app where people can sign up, log in, and get matched with another player to solve programming problems live. I want quick matchmaking, private friend challenges, and a clean game room where both players can type code, submit it, and see results right away for things like compile errors, runtime errors, and test cases.

The app should keep score with an Elo style rating system, update wins and losses after each match, and handle disconnects or leaving the tab as an automatic forfeit. Please also add basic anti cheat and bot protection, like blocking tab switching during ranked matches and requiring captcha for signup. Profiles should include stats and a simple avatar or character choice.

Make it feel polished, fast, and multiplayer first, with live updates between players. If you need to check current docs for any libraries or services, go ahead and look them up online.