Fix minor bugs in gift-context.tsx

frontend/src/context/gift-context.tsx

@@ -275,7 +275,7 @@ export const GiftProvider: React.FC<GiftProviderProps> = ({ children }) => {
         ? readGiftCategories({
             path: { event_id: currentEventId },
           }).then((res) => res.data)
-        : Promise.resolve(undefined),
+        : Promise.resolve([]),
     enabled: !!currentEventId,
   });
 
@@ -385,10 +385,9 @@ export const GiftProvider: React.FC<GiftProviderProps> = ({ children }) => {
       if (currentCategoryId) {
         query.category_id = currentCategoryId;
       }
-      // We don't need to add event_id to query since it's part of the path
 
       if (!currentEventId) {
-        return Promise.resolve(undefined);
+        return Promise.resolve([]);
       }
 
       return readGiftItems({
@@ -396,7 +395,7 @@ export const GiftProvider: React.FC<GiftProviderProps> = ({ children }) => {
         query,
       }).then((res) => res.data);
     },
-    enabled: !!(currentCategoryId || currentEventId),
+    enabled: !!currentEventId,
   });
 
   const refetchItems = async (categoryId?: string, eventId?: string) => {