Better Auth Authentication

This handles Better Auth setup for TypeScript apps, covering email/password login and OAuth providers like GitHub. You get client methods for signUp, signIn (both email and social), and signOut, plus email verification hooks if you need them. The separation between server config (credentials, verification handlers) and client calls is clean, and it includes callback URLs for post-auth redirects. If you're already using Better Auth or evaluating it against NextAuth or Clerk, this gives you the implementation patterns without digging through docs. The guardrails about keeping secrets server-side and calling client methods only from the client are basic but worth the reminder.