Fed-Labs/Echo-Market — reverse-engineered prompt

Build me a simple web app called Echo Market using the existing frontend and backend setup in this repo. I want it to feel like a small online marketplace where people can browse items, open a listing to see details, and add a new listing with a title, description, price, category, and image link.

Please make the frontend clean and easy to use, with a homepage, search or filtering if it’s simple, a listing details page, and a form to create a listing. The backend should store and return listings through basic API routes, with sensible validation and clear error messages. Use TypeScript throughout since that’s what the repo is using.

Keep the first version practical and working rather than overbuilt. If there’s no database already configured, use a simple local setup or in memory data with a clear spot to swap in a real database later. Look up current docs online if you need to. Make sure I can run the frontend and backend locally and include any setup notes.