Devmayank-official/DML-Arena ? reverse-engineered prompt

Build me a polished web app called DML Arena, an open source place where people can compare AI models side by side and see which one answers better. I want a landing page, a main arena where I can enter a prompt and watch multiple model responses stream in at the same time, and a deep mode that lets models debate and then gives a final synthesized answer. Include login, saved history, favorites, shareable read only links, a community feed for shared comparisons, and a dashboard with basic stats like response time and win rate. Make it feel modern, fast, and mobile friendly, with dark and light themes, keyboard shortcuts, and an installable app like a PWA. Use the existing Supabase setup for auth, storage, realtime, and data, and make sure the app is safe with sanitized markdown and sensible validation. If you need current docs or setup details, look them up online first.