SUBHAM-RAJ-X/Ai-spend-audit ? reverse-engineered prompt

Build me a modern web app called AI Spend Audit that helps businesses see where they are overspending on AI tools and subscriptions. I want users to add their tools and monthly costs, get a clear audit of total spend, see simple recommendations for how to cut costs, and get a polished summary that can use AI when available, or a sensible fallback if not.

The app should have a clean SaaS style, work well on mobile and desktop, and let people share a public link to their audit results without exposing private info like email or company name. It should also collect basic lead info in a simple form, save audit data and leads in Supabase, and be ready to run locally and deploy easily on Vercel. If anything needs current setup details, look up the latest docs online and keep the experience smooth and professional.