fix(pitch-deck): resolve Docker build failures — nodemailer webpack + jose Edge Runtime

- Add nodemailer to serverExternalPackages so webpack doesn't try to
  bundle fs/net/dns built-ins (was fatal build error)
- Import jwtVerify from jose/jwt/verify instead of the full jose index
  to avoid pulling in JWE deflate code incompatible with Edge Runtime

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

pitch-deck/middleware.ts

@@ -1,5 +1,5 @@
 import { NextRequest, NextResponse } from 'next/server'
-import { jwtVerify } from 'jose'
+import { jwtVerify } from 'jose/jwt/verify'
 
 // Paths that bypass auth entirely
 const PUBLIC_PATHS = [