shobika943/splitzy ? reverse-engineered prompt

Build me a real time expense splitting app like Splitwise where friends can sign up, log in, create groups, and add shared expenses that get split equally across everyone in the group. I want the balances to update instantly on everyone’s screen with no refresh, plus a settle up view that shows the minimum number of payments needed to clear debts. Include a live progress dashboard that shows how much of the group’s debt is settled, how much has been spent, and how much is still pending. When someone marks a payment as paid, the other person should get an instant in app notification wherever they are. Also add live presence so people can see who is currently viewing a group, and make the whole thing feel polished with smooth animations and page transitions. Use a modern clean UI and make it work with a separate frontend and backend, and look up current docs online if you need to.