step 10.4: done

public/js/create-hero.js

@@ -1,4 +1,14 @@
 document.addEventListener('DOMContentLoaded', () => {
+  // If user already has a hero, redirect to game page
+  api.get('/auth/me').then((data) => {
+    if (data.hasHero) {
+      window.location.href = '/game.html';
+      return;
+    }
+  }).catch(() => {
+    // Not logged in or error — stay on page (login form will show)
+  });
+
   const form = document.getElementById('create-hero-form');
   if (!form) return;