sinharoyneha-alt/feedback-collector ? reverse-engineered prompt

Build me a simple feedback collector app where people can submit feedback through a clean form and see the feedback saved and displayed in the app.

I want a modern front end and a backend that stores the entries, so submitted feedback is not lost on refresh. The app should make it easy to add a new message, view all collected feedback, and keep the interface friendly and easy to use. If it makes sense, include basic validation so empty submissions are blocked and show a nice success or error message after submitting.

Please set it up so I can run the full project locally without a lot of extra work, and if you need current setup details for the stack, look up the latest docs online. I want the result to feel like a real working MERN app that is ready to demo.