Refactor budget calculation logic

Modify budget calculation to use monthly input as the base and adjust tab order.

src/contexts/budget/hooks/useBudgetState.ts

@@ -9,7 +9,7 @@ import { safelyLoadBudgetData } from '../budgetUtils';
 export const useBudgetState = () => {
   // 초기 데이터 로드 시 safelyLoadBudgetData 함수 사용
   const [budgetData, setBudgetData] = useState<BudgetData>(safelyLoadBudgetData());
-  const [selectedTab, setSelectedTab] = useState<BudgetPeriod>("daily");
+  const [selectedTab, setSelectedTab] = useState<BudgetPeriod>("daily"); // 초기값을 daily로 변경
   const [isInitialized, setIsInitialized] = useState(false);
   const [lastUpdateTime, setLastUpdateTime] = useState(0);