YassWorks/Evalda ? reverse-engineered prompt

Build me the full Evalda platform for running ML competitions, with a clean website for participants and admins, plus the backend that powers judging and leaderboards.

I want two competition modes. One should let teams upload a zip with their code, model, and requirements, then safely run it in a sandbox, score the predictions outside the sandbox, and show live submission progress. The other should give each team a cloud VM, let them fix and improve a broken starter setup, and then grade the running system as a black box.

Make the app feel production ready, with login, team management, submission pages, anonymous leaderboards, and an admin area for setting up contests and viewing status. Use the existing stack in the repo and keep it working with Supabase, Redis, Docker, Celery, and the frontend in Next.js. If anything is unclear, check the docs and look up current docs online if you need to.