first implementation

frontend/app/signup/[code]/page.tsx

@@ -0,0 +1,37 @@
+"use client";
+
+import { useEffect } from "react";
+import { useRouter, useParams } from "next/navigation";
+import { useAuth } from "../../auth-context";
+
+export default function SignupWithCodePage() {
+  const params = useParams();
+  const router = useRouter();
+  const { user } = useAuth();
+  const code = params.code as string;
+
+  useEffect(() => {
+    if (user) {
+      // Already logged in, redirect to home
+      router.replace("/");
+    } else {
+      // Redirect to signup with code as query param
+      router.replace(`/signup?code=${encodeURIComponent(code)}`);
+    }
+  }, [user, code, router]);
+
+  return (
+    <main style={{ 
+      minHeight: "100vh", 
+      display: "flex", 
+      alignItems: "center", 
+      justifyContent: "center",
+      background: "linear-gradient(135deg, #0f0f23 0%, #1a1a3e 50%, #0f0f23 100%)",
+      color: "rgba(255,255,255,0.6)",
+      fontFamily: "'DM Sans', system-ui, sans-serif",
+    }}>
+      Redirecting...
+    </main>
+  );
+}
+