fix(WEB): 등록 버튼 링크를 ?mode=new 방식으로 변경

- 입금관리: /new → ?mode=new
- 출금관리: /new → ?mode=new
- 매출관리: /new → ?mode=new
- 카드관리: /new → ?mode=new

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/components/accounting/WithdrawalManagement/index.tsx

@@ -299,7 +299,7 @@ export function WithdrawalManagement({ initialData, initialPagination }: Withdra
 
       // 헤더 액션 (등록 버튼)
       headerActions: () => (
-        <Button className="ml-auto" onClick={() => router.push('/ko/accounting/withdrawals/new')}>
+        <Button className="ml-auto" onClick={() => router.push('/ko/accounting/withdrawals?mode=new')}>
           <Plus className="w-4 h-4 mr-2" />
           출금등록
         </Button>