Fix duplicate exports and filter error handling

app/list/[id]/page.tsx

@@ -11,9 +11,6 @@ import ListDetailView from '@/components/ListDetailView'
 export const dynamic = 'force-dynamic'
 export const revalidate = 0
 
-export const dynamic = 'force-dynamic'
-export const revalidate = 0
-
 export default async function ListDetailPage({ params }: { params: { id: string } }) {
   const session = await getServerSession(authOptions)
   if (!session?.user?.id) {

components/ListDetailView.tsx

@@ -134,8 +134,12 @@ export default function ListDetailView({
         sortOrder: newFilters.sortOrder
       })
       // Extract items from pagination result
-      const items = 'items' in results ? results.items : results
-      setFilteredItems(items as Item[])
+      if (results) {
+        const items = 'items' in results ? results.items : results
+        setFilteredItems(items as Item[])
+      } else {
+        setFilteredItems(initialItems)
+      }
     } catch (error) {
       console.error('Filter error:', error)
       setFilteredItems(initialItems)