Fix data persistence issue

Addresses a problem where budget and expense data was not being saved correctly.

src/contexts/budget/BudgetContext.tsx

@@ -15,7 +15,9 @@ interface BudgetContextType {
     current: number;
     total: number;
   }>;
+  addTransaction: (transaction: Transaction) => void;
   updateTransaction: (transaction: Transaction) => void;
+  deleteTransaction: (id: string) => void;
   handleBudgetGoalUpdate: (type: BudgetPeriod, amount: number, newCategoryBudgets?: Record<string, number>) => void;
   resetBudgetData?: () => void; // 선택적 필드로 추가
 }