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/useBudgetState.ts

@@ -64,7 +64,7 @@ export const useBudgetState = () => {
     };
     
     // 로컬 이벤트 발생 (다른 컴포넌트에서 변경 감지하도록)
-    window.dispatchEvent(new Event('categoryBudgetsUpdated'));
+    window.dispatchEvent(new Event('budgetDataUpdated'));
   }, [categoryBudgets, budgetData]);
 
   // 모든 데이터 리셋 함수