fix

frontend/src/components/CounterDetail.tsx

@@ -222,13 +222,13 @@ export const CounterDetail: React.FC = () => {
           Recent Entries
         </h2>
         
-        {entries.length === 0 ? (
+        {(entries?.length || 0) === 0 ? (
           <div className="text-center py-8 text-gray-500">
             No entries yet. Start by incrementing your counter!
           </div>
         ) : (
           <div className="space-y-3">
-            {entries.slice(0, 10).map((entry) => (
+            {entries?.slice(0, 10).map((entry) => (
               <div
                 key={entry.id}
                 className="flex justify-between items-center py-2 px-4 bg-gray-50 rounded-lg"