w3aftab/mern-daily-notes ? reverse-engineered prompt

Build me a simple daily notes app where I can write, save, edit, and delete notes from a clean web interface.

I want it to feel easy to use, with a page to see all my notes, a form to add a new one, and a way to open a note and update it later. Please make it work as a full app with a frontend and backend, and store the notes in a database so they are still there when I come back. Keep the design simple and modern, and make sure it works well on both desktop and mobile.

If you need to check anything current while building it, look up the latest docs online. Also please include basic validation and handle loading or error states so it feels finished.