Add progress messages between each demo step

Stream demo progress in real-time with faster polling

Replace WebSocket confirmTransaction with HTTP polling for Vercel

Fix Vercel serverless WebSocket error (t.mask is not a function)

Remove vercel.json — Root Directory already set to app/ in Vercel dashboard

Add vercel.json for monorepo deployment

Add .npmrc with legacy-peer-deps for anchor-bankrun compatibility

Fix Next.js build: restore self-contained PDA utils for app

Security hardening, receipt NFT invalidation, and test coverage expansion

Initial Commit