Fix data loading issues

Addresses issues where budget data is missing on expense and analytics pages, and where transactions are being automatically created.

src/contexts/budget/storage/transactionStorage.ts

@@ -27,6 +27,7 @@ export const loadTransactionsFromStorage = (): Transaction[] => {
   } catch (error) {
     console.error('트랜잭션 데이터 파싱 오류:', error);
   }
+  // 데이터가 없을 경우 빈 배열 반환 (샘플 데이터 생성하지 않음)
   return [];
 };