Reconstruct React App from Build

I have only the production build of a React project—the bundled JavaScript, assets folder, and the generated index.html. The original source code is gone, yet I still depend on this application every day, so I need a full recreation of it in clean, maintainable React source.

The goal is a pixel-perfect replica: same screens, same styling, and every single feature that exists in the build today. Because I do not have any documentation or notes, you will have to inspect the compiled code, map out the routing and component hierarchy, and then rebuild it from scratch with modern React (functional components and hooks preferred).

Acceptance criteria
• New source compiles with create-react-app (or Vite) and runs locally without errors.
• Visual layout matches the current build across desktop and mobile breakpoints.
• All existing functionality—including navigation, data flow, and edge-case behaviours—works exactly as in the live build.
• Code is organised and commented clearly enough for another developer to pick up.
• A short handover README explains project setup, build commands, and any third-party libraries you introduced.

Once the source is complete and verified, I’ll test it against the current build to confirm parity before we mark the project done.