venus220706/expense-tracker ? reverse-engineered prompt

Build me a full stack expense tracker where people can sign up, log in, and manage their personal expenses securely with JWT login.

I want a simple, clean dashboard where users can add, edit, delete, and view expenses, then search through them and filter by category. Please include basic stats for spending and an interactive chart so users can quickly understand where their money is going. Toast notifications would be nice for actions like saving or deleting an expense, and the whole thing should work well on mobile too.

Use a React frontend and a Node, Express, MongoDB backend. Make sure the app feels polished and easy to use, with a smooth login flow and protected pages after authentication. If you need to check current docs for anything, feel free to look them up online.