feat(WEB): 전체 페이지 ?mode= URL 네비게이션 패턴 적용

- 등록(?mode=new), 상세(?mode=view), 수정(?mode=edit) URL 패턴 일괄 적용
- 중복 패턴 제거: /edit?mode=edit → ?mode=edit (16개 파일)
- 제목 일관성: {기능} 등록/상세/수정 패턴 적용
- 검수 체크리스트 문서 추가 (79개 페이지)
- UniversalListPage, IntegratedDetailTemplate 공통 컴포넌트 개선

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

src/components/quotes/QuoteManagementClient.tsx

@@ -79,11 +79,11 @@ export function QuoteManagementClient({
 
   // ===== 핸들러 =====
   const handleView = useCallback((quote: Quote) => {
-    router.push(`/sales/quote-management/${quote.id}`);
+    router.push(`/sales/quote-management/${quote.id}?mode=view`);
   }, [router]);
 
   const handleEdit = useCallback((quote: Quote) => {
-    router.push(`/sales/quote-management/${quote.id}/edit`);
+    router.push(`/sales/quote-management/${quote.id}?mode=edit`);
   }, [router]);
 
   const handleDeleteClick = useCallback((id: string) => {
@@ -358,7 +358,7 @@ export function QuoteManagementClient({
       headerActions: () => (
         <Button
           className="ml-auto"
-          onClick={() => router.push('/sales/quote-management/new')}
+          onClick={() => router.push('/sales/quote-management?mode=new')}
         >
           <FileText className="w-4 h-4 mr-2" />
           견적 등록

src/components/quotes/quoteConfig.ts

@@ -65,7 +65,7 @@ export const quoteEditConfig: DetailConfig = {
  * - 저장/취소 버튼이 IntegratedDetailTemplate에서 처리됨
  */
 export const quoteRegistrationCreateConfig: DetailConfig = {
-  title: '견적 등록',
+  title: '견적',
   description: '새 견적을 등록합니다',
   icon: FileText,
   basePath: '/sales/quote-management',
@@ -82,7 +82,7 @@ export const quoteRegistrationCreateConfig: DetailConfig = {
  * 견적 수정 페이지 Config (구버전 QuoteRegistration용)
  */
 export const quoteRegistrationEditConfig: DetailConfig = {
-  title: '견적 수정',
+  title: '견적',
   description: '견적 정보를 수정합니다',
   icon: FileText,
   basePath: '/sales/quote-management',