feat: add Redis-backed SSE updates

app/admin/form/[id]/result/[submissionId]/page.tsx

@@ -5,6 +5,7 @@ import { Button } from "@/components/ui/button";
 import { ArrowLeft, ArrowRight } from "lucide-react";
 import SubmissionDetailClient from "./client";
 import { DeleteSubmissionButton } from "@/components/delete-buttons";
+import { RealtimeRefresh } from "@/components/realtime-refresh";
 
 interface SubmissionDetailPageProps {
   params: Promise<{
@@ -48,6 +49,7 @@ export default async function SubmissionDetailPage({ params }: SubmissionDetailP
 
   return (
     <div className="space-y-6 w-full max-w-6xl mx-auto p-4 md:p-6 pb-10">
+      <RealtimeRefresh topic="submissions" formId={formId} />
       <div className="flex items-center justify-between">
         <div className="flex items-center gap-2">
           <Link href={`/admin/form/${formId}/result`}>