Refactor: Split useBudgetDataState hook

Splits the `useBudgetDataState` hook into smaller, more manageable hooks for state management, data loading, and event handling. This improves code organization and maintainability while preserving existing functionality.

src/contexts/budget/hooks/useBudgetState.ts

@@ -0,0 +1,26 @@
+
+import { useState } from 'react';
+import { BudgetData, BudgetPeriod } from '../types';
+import { safelyLoadBudgetData } from '../budgetUtils';
+
+/**
+ * 예산 데이터의 기본 상태를 관리하는 훅
+ */
+export const useBudgetState = () => {
+  // 초기 데이터 로드 시 safelyLoadBudgetData 함수 사용
+  const [budgetData, setBudgetData] = useState<BudgetData>(safelyLoadBudgetData());
+  const [selectedTab, setSelectedTab] = useState<BudgetPeriod>("daily");
+  const [isInitialized, setIsInitialized] = useState(false);
+  const [lastUpdateTime, setLastUpdateTime] = useState(0);
+
+  return {
+    budgetData,
+    setBudgetData,
+    selectedTab,
+    setSelectedTab,
+    isInitialized,
+    setIsInitialized,
+    lastUpdateTime,
+    setLastUpdateTime
+  };
+};