fix: [vendor] 거래처 관리 날짜 필터 기본값 변경

- 기본값을 당월 → 빈 값(전체 조회)으로 변경
- date-fns import 제거
- 날짜 필터 범위 조건 개선

src/components/accounting/VendorManagement/VendorManagementClient.tsx

@@ -11,7 +11,6 @@
 
 import { useState, useMemo, useCallback } from 'react';
 import { useRouter } from 'next/navigation';
-import { format, startOfMonth, endOfMonth } from 'date-fns';
 import { formatNumber } from '@/lib/utils/amount';
 import { applyFilters, textFilter, enumFilter } from '@/lib/utils/search';
 import {
@@ -73,8 +72,8 @@ export function VendorManagementClient({ initialData, initialTotal: _initialTota
   const router = useRouter();
 
   // ===== 상태 관리 =====
-  const [startDate, setStartDate] = useState(() => format(startOfMonth(new Date()), 'yyyy-MM-dd'));
-  const [endDate, setEndDate] = useState(() => format(endOfMonth(new Date()), 'yyyy-MM-dd'));
+  const [startDate, setStartDate] = useState('');
+  const [endDate, setEndDate] = useState('');
   const [searchQuery, setSearchQuery] = useState('');
   const [sortOption, setSortOption] = useState<SortOption>('latest');
   const [categoryFilter, setCategoryFilter] = useState<string>('all');
@@ -124,9 +123,12 @@ export function VendorManagementClient({ initialData, initialTotal: _initialTota
       enumFilter('transactionGrade', transactionGradeFilter),
       enumFilter('badDebtStatus', badDebtFilter),
       (items: Vendor[]) => items.filter((item) => {
+        if (!startDate && !endDate) return true;
         if (!item.createdAt) return true;
         const created = item.createdAt.slice(0, 10);
-        return created >= startDate && created <= endDate;
+        if (startDate && created < startDate) return false;
+        if (endDate && created > endDate) return false;
+        return true;
       }),
     ]);
 

src/components/accounting/VendorManagement/index.tsx

@@ -76,9 +76,9 @@ interface VendorManagementProps {
 export function VendorManagement({ initialData, initialTotal: _initialTotal }: VendorManagementProps) {
   const router = useRouter();
 
-  // ===== 날짜 범위 상태 =====
-  const [startDate, setStartDate] = useState(() => format(startOfMonth(new Date()), 'yyyy-MM-dd'));
-  const [endDate, setEndDate] = useState(() => format(endOfMonth(new Date()), 'yyyy-MM-dd'));
+  // ===== 날짜 범위 상태 (빈 값 = 전체 조회) =====
+  const [startDate, setStartDate] = useState('');
+  const [endDate, setEndDate] = useState('');
 
   // ===== 외부 상태 (Stats 계산용) =====
   const [vendorData, setVendorData] = useState<Vendor[]>(initialData);