strudast/mern-thinkboard ? reverse-engineered prompt

Build me a simple full stack app called Thinkboard where people can save quick thoughts, ideas, and notes in one place.

I want a clean page where users can add a new thought, see their saved thoughts in a list or board, edit them, and delete them when they are done. Make it feel modern and easy to use, with a simple layout that works well on desktop and mobile. If it makes sense, add basic login so each person can keep their own board.

Set up the frontend and backend so the app actually works end to end, with data saved in a database and loaded back when the page refreshes. Keep the code organized and easy to understand, and make the interface polished enough that it feels like a real product. If you need to check current docs or best practices while building it, go ahead and look them up online.