Fix TS2353 error in useTransactions

The object literals in createSampleTransactions function were specifying the 'notes' property, which does not exist in the Transaction type. This commit removes the 'notes' property from the object literals to resolve the TS2353 error.

src/hooks/useTransactions.ts

@@ -38,7 +38,7 @@ const createSampleTransactions = (month: string): Transaction[] => {
       amount: 35000,
       category: '식비',
       date: `${monthIndex + 1}월 10일, ${year}`,
-      notes: '주간 장보기'
+      type: 'expense'
     },
     {
       id: 'sample-2',
@@ -46,7 +46,7 @@ const createSampleTransactions = (month: string): Transaction[] => {
       amount: 20000,
       category: '교통비',
       date: `${monthIndex + 1}월 5일, ${year}`,
-      notes: '월간 교통비'
+      type: 'expense'
     }
   ];
 };