Add admin/curator split-view questions page

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/curator/questions/page.tsx

@@ -0,0 +1,12 @@
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { redirect } from "next/navigation";
+import { QuestionSplitView } from "@/components/questions/QuestionSplitView";
+
+export default async function CuratorQuestionsPage() {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session) redirect("/login");
+  if (session.user.role !== "admin" && session.user.role !== "curator") redirect("/dashboard");
+
+  return <QuestionSplitView currentUserId={session.user.id} />;
+}