fix: some Copilot bugs

Author: TechQuery

app/activities/[id]/page.tsx

@@ -28,10 +28,14 @@ const DATA_EDIT_URL =
 
 async function findActivity(id: string) {
   const res = await fetch(ACTIVITIES_API_URL, { cache: 'force-cache' });
-  if (!res.ok) throw new Error(`Failed to fetch activities: ${res.status}`);
+
+  if (!res.ok) throw new URIError(`Failed to fetch activities: ${res.status}`);
+
   const externalData = (await res.json()) as ExternalDeadlineItem[];
+
   for (const raw of externalData) {
     const item = transformItem(raw);
+
     for (const event of item.events)
       if (event.id === id) return { item, event };
   }

app/restaurants/[id]/page.tsx

@@ -70,7 +70,7 @@ export default async function RestaurantDetailPage({
             </div>
 
             {/* Food types */}
-            {restaurant.food && restaurant.food.length > 0 && (
+            {restaurant.food?.[0] && (
               <div className="text-sm">
                 <span className="font-medium text-gray-700">
                   美食类型