🔧 API Format Fix:
- Convert register.ts to register.js using req/res pattern
- Convert login.ts to login.js using req/res pattern
- Convert setup-auth.ts to setup-auth.js using req/res pattern
- Use CommonJS require() instead of ES6 imports
- Use traditional Vercel function signature that works
✅ Working Format:
- export default async function handler(req, res)
- req.body for request data (auto-parsed by Vercel)
- res.status().json() for responses
- CommonJS modules with require()
This should resolve all timeout issues and make authentication work properly.
