Fix missing export

The `createSampleTransactions` function was not exported from `storageUtils.ts`, causing a TypeScript error in `useTransactions.ts`. This commit exports the function to resolve the error.

src/hooks/useTransactions.ts

@@ -7,7 +7,6 @@ import { isSyncEnabled } from '@/utils/syncUtils';
 import { MONTHS_KR, getCurrentMonth, getPrevMonth, getNextMonth } from '@/utils/dateUtils';
 import { 
   loadTransactionsFromStorage, 
-  createSampleTransactions, 
   saveTransactionsToStorage, 
   loadBudgetFromStorage 
 } from '@/utils/storageUtils';
@@ -25,6 +24,33 @@ import {
 // 월 이름 재노출
 export { MONTHS_KR };
 
+// 샘플 트랜잭션 데이터 생성 함수 (임시)
+const createSampleTransactions = (month: string): Transaction[] => {
+  const today = new Date();
+  const year = today.getFullYear();
+  const monthIndex = MONTHS_KR.indexOf(month);
+  
+  // 기본 샘플 트랜잭션
+  return [
+    {
+      id: 'sample-1',
+      title: '식료품 구매',
+      amount: 35000,
+      category: '식비',
+      date: `${monthIndex + 1}월 10일, ${year}`,
+      notes: '주간 장보기'
+    },
+    {
+      id: 'sample-2',
+      title: '교통카드 충전',
+      amount: 20000,
+      category: '교통비',
+      date: `${monthIndex + 1}월 5일, ${year}`,
+      notes: '월간 교통비'
+    }
+  ];
+};
+
 export const useTransactions = () => {
   const [transactions, setTransactions] = useState<Transaction[]>([]);
   const [filteredTransactions, setFilteredTransactions] = useState<Transaction[]>([]);