lxlideas24/omr ? reverse-engineered prompt

Build me a full stack web app that lets me drag and drop a bunch of OMR sheet images, send them through AI, and pull out the handwritten data into a clean table I can edit before exporting to CSV.

I want it to handle large batches smoothly, show a clear progress indicator and a live count of how many files are done, and keep working even if I upload a lot at once. The AI should use Google Gemini, and if one model hits limits or fails, it should automatically try another one so the process does not stop. It should also let me pick the model I want from the interface.

Make the app responsive and simple to use, with a polished frontend and a Node and Express backend for file uploads and processing. Include the CSV export, good error messages, and sensible defaults so I can run it locally with an API key and also deploy it easily later. If you need to check current docs online, go ahead.