Fix CORS errors on auth buttons by using anchor tags (#9)

Replace Next.js Link components with anchor tags for sign-in/sign-up
buttons to prevent prefetch-induced CORS errors when accessing WorkOS
authorization endpoints.

Author: nicknisi

app/page.tsx

@@ -32,12 +32,12 @@ function SignInForm() {
   return (
     <div className="flex flex-col gap-8 w-96 mx-auto">
       <p>Log in to see the numbers</p>
-      <Link href="/sign-in">
+      <a href="/sign-in">
         <button className="bg-foreground text-background px-4 py-2 rounded-md">Sign in</button>
-      </Link>
-      <Link href="/sign-up">
+      </a>
+      <a href="/sign-up">
         <button className="bg-foreground text-background px-4 py-2 rounded-md">Sign up</button>
-      </Link>
+      </a>
     </div>
   );
 }