Fix data persistence issue

Addresses a bug where budget and expense data were not persisting correctly, leading to data loss when navigating between pages.

src/contexts/budget/hooks/useCategoryBudgetState.ts

@@ -4,7 +4,7 @@ import {
   loadCategoryBudgetsFromStorage, 
   saveCategoryBudgetsToStorage, 
   clearAllCategoryBudgets 
-} from '../storage/categoryStorage';
+} from '../storage';
 
 // 카테고리 예산 상태 관리 훅
 export const useCategoryBudgetState = () => {
@@ -12,6 +12,21 @@ export const useCategoryBudgetState = () => {
     loadCategoryBudgetsFromStorage()
   );
 
+  // 이벤트 리스너 설정
+  useEffect(() => {
+    const handleCategoryUpdate = () => {
+      setCategoryBudgets(loadCategoryBudgetsFromStorage());
+    };
+    
+    window.addEventListener('categoryBudgetsUpdated', handleCategoryUpdate);
+    window.addEventListener('storage', handleCategoryUpdate);
+    
+    return () => {
+      window.removeEventListener('categoryBudgetsUpdated', handleCategoryUpdate);
+      window.removeEventListener('storage', handleCategoryUpdate);
+    };
+  }, []);
+
   // 카테고리 예산 업데이트 함수
   const updateCategoryBudgets = useCallback((newCategoryBudgets: Record<string, number>) => {
     setCategoryBudgets(newCategoryBudgets);