Increase polling interval to 5 seconds to prevent modal closing

app/page.tsx

@@ -23,7 +23,7 @@ export default async function Home() {
 
   return (
     <main className="container mx-auto px-4 sm:px-6 py-6 sm:py-8 max-w-7xl">
-      <RealtimeUpdater pollInterval={1000} />
+      <RealtimeUpdater pollInterval={5000} />
       <div className="flex flex-col sm:flex-row items-start sm:items-center justify-between gap-4 mb-6 sm:mb-8">
         <h1 className="text-2xl sm:text-3xl lg:text-4xl font-bold text-gray-900">Ultimate Lists</h1>
         <div className="flex items-center gap-3">