sundramsoni8899/mern-Todo-app ? reverse-engineered prompt

Build me a simple full stack todo app where I can add tasks, edit them, mark them complete, and delete them.

I want a clean frontend and a backend that saves the todos so they are still there after refresh. Please make it easy to use, with a nice modern layout, basic validation, and clear feedback when something is added or updated. If it makes sense, include simple filtering like all, active, and completed, plus a way to toggle items on and off.

Set it up as a working project with the frontend and backend wired together so I can run it locally and use it right away. Keep the code organized and easy to understand. If you need current setup details for any library, look up the latest docs online first.