feat: auth error page

Author: Eric-Zhang-Developer

src/app/auth/auth-code-error/page.tsx

@@ -0,0 +1,24 @@
+import Link from "next/link";
+
+export default function AuthCodeError() {
+  return (
+    <main
+      className="min-h-dvh flex items-center justify-center bg-cover bg-center bg-no-repeat p-6 font-cinzel text-white"
+      style={{ backgroundImage: "url('/geminiblurred.png')" }}
+    >
+      <div className="w-full max-w-md bg-white/10 backdrop-blur-lg border border-white/20 rounded-2xl shadow-[0_0_30px_rgba(255,255,255,0.25)] p-8 text-center">
+        <h1 className="text-3xl font-bold mb-4">⚠️ Authentication Failed</h1>
+        <p className="text-white/70 mb-6">
+          Something went wrong while signing you in. This could happen if the login was cancelled or
+          took too long.
+        </p>
+        <Link
+          href="/login"
+          className="inline-block px-6 py-2 bg-indigo-600 hover:bg-indigo-500 rounded-md font-semibold transition shadow-[0_0_20px_rgba(140,120,255,0.7)]"
+        >
+          Try Again
+        </Link>
+      </div>
+    </main>
+  );
+}