feat(dialog): 상세 팝업 SuperportDetailDialog 통합

- SuperportDetailDialog 위젯과 showSuperportDetailDialog 헬퍼를 추가하고 metadata/섹션 패턴을 표준화

- 결재/재고/마스터 각 상세 다이얼로그를 dialogs 디렉터리에 신설하고 기존 페이지를 신규 팝업으로 전환

- SuperportTable 행 선택과 우편번호 검색 다이얼로그 onRowTap 보정을 통해 헤더 오프셋 버그를 제거

- 상세 다이얼로그 및 트랜잭션/상세 뷰 전용 위젯 테스트와 tester_extensions 유틸을 추가하여 회귀를 방지

- detail_dialog_unification_plan.md로 작업 배경과 필드 통합 계획을 문서화

test/features/approvals/step/presentation/pages/approval_step_page_test.dart

@@ -108,20 +108,18 @@ void main() {
     await tester.pump();
     await tester.pumpAndSettle();
 
-    expect(find.text('APP-2024-0001'), findsOneWidget);
-    expect(find.text('최승인'), findsOneWidget);
+    expect(find.text('APP-2024-0001'), findsWidgets);
+    expect(find.text('최승인'), findsWidgets);
 
-    final detailButtonFinder = find.byKey(const ValueKey('step_detail_501_1'));
-    final detailButton = tester.widget<ShadButton>(detailButtonFinder);
-    detailButton.onPressed?.call();
+    await tester.tap(find.text('APP-2024-0001'));
     await tester.pump();
     await tester.pumpAndSettle();
 
-    expect(find.text('결재 단계 상세'), findsOneWidget);
-    expect(find.text('검토 필요'), findsOneWidget);
+    expect(find.text('결재 단계 상세'), findsWidgets);
+    expect(find.text('검토 필요'), findsWidgets);
     verify(() => repository.fetchDetail(501)).called(1);
 
-    await tester.tap(find.text('닫기'));
+    await tester.tap(find.byTooltip('닫기'));
     await tester.pumpAndSettle();
   });
 
@@ -198,7 +196,7 @@ void main() {
     expect(find.text('결재번호 APP-2024-0012 단계가 추가되었습니다.'), findsOneWidget);
   });
 
-  testWidgets('단계 수정 다이얼로그에서 저장을 호출한다', (tester) async {
+  testWidgets('상세 다이얼로그에서 단계를 수정한다', (tester) async {
     dotenv.testLoad(fileInput: 'FEATURE_APPROVALS_ENABLED=true\n');
     repository = _MockApprovalStepRepository();
     GetIt.I.registerLazySingleton<ApprovalStepRepository>(() => repository);
@@ -237,6 +235,7 @@ void main() {
       ),
     );
 
+    when(() => repository.fetchDetail(any())).thenAnswer((_) async => record);
     when(
       () => repository.update(any(), any()),
     ).thenAnswer((_) async => updatedRecord);
@@ -245,36 +244,43 @@ void main() {
     await tester.pump();
     await tester.pumpAndSettle();
 
-    final editButtonFinder = find.byKey(
-      ValueKey('step_edit_${record.step.id}_${record.step.stepOrder}'),
-    );
-    final editButton = tester.widget<ShadButton>(editButtonFinder);
-    editButton.onPressed?.call();
+    await tester.tap(find.text('APP-2024-0001'));
+    await tester.pump();
+    await tester.pumpAndSettle();
+
+    final editTabsState =
+        tester.state(find.byWidgetPredicate((widget) => widget is ShadTabs))
+            as dynamic;
+    editTabsState.controller.select('edit');
     await tester.pump();
     await tester.pumpAndSettle();
 
     await tester.enterText(
-      find.byKey(const ValueKey('step_form_step_order')),
+      find.byKey(const ValueKey('approval_step_detail_step_order')),
       '2',
     );
     await tester.enterText(
-      find.byKey(const ValueKey('step_form_approver_id')),
+      find.byKey(const ValueKey('approval_step_detail_approver_id')),
       '30',
     );
-    await tester.enterText(find.byKey(const ValueKey('step_form_note')), '수정됨');
+    await tester.enterText(
+      find.byKey(const ValueKey('approval_step_detail_note')),
+      '수정됨',
+    );
 
-    await tester.tap(find.byKey(const ValueKey('step_form_submit')));
+    final submitButtonFinder = find.byKey(
+      const ValueKey('approval_step_detail_submit'),
+    );
+    final submitButton = tester.widget<ShadButton>(submitButtonFinder);
+    submitButton.onPressed?.call();
     await tester.pump();
     await tester.pumpAndSettle();
 
     verify(() => repository.update(record.step.id!, any())).called(1);
-    expect(
-      find.text('결재번호 ${record.approvalNo} 단계 정보를 수정했습니다.'),
-      findsOneWidget,
-    );
+    expect(find.text('결재 단계 정보를 수정했습니다.'), findsOneWidget);
   });
 
-  testWidgets('삭제 버튼 확인 후 저장소 삭제를 호출한다', (tester) async {
+  testWidgets('상세 다이얼로그에서 단계를 삭제한다', (tester) async {
     dotenv.testLoad(fileInput: 'FEATURE_APPROVALS_ENABLED=true\n');
     repository = _MockApprovalStepRepository();
     GetIt.I.registerLazySingleton<ApprovalStepRepository>(() => repository);
@@ -297,26 +303,37 @@ void main() {
       ),
     );
 
+    when(() => repository.fetchDetail(any())).thenAnswer((_) async => record);
     when(() => repository.delete(any())).thenAnswer((_) async {});
 
     await tester.pumpWidget(_buildApp(const ApprovalStepPage()));
     await tester.pump();
     await tester.pumpAndSettle();
 
-    final deleteFinder = find.byKey(const ValueKey('step_delete_501_1'));
-    final deleteButton = tester.widget<ShadButton>(deleteFinder);
+    await tester.tap(find.text('APP-2024-0001'));
+    await tester.pump();
+    await tester.pumpAndSettle();
+
+    final deleteTabsState =
+        tester.state(find.byWidgetPredicate((widget) => widget is ShadTabs))
+            as dynamic;
+    deleteTabsState.controller.select('delete');
+    await tester.pump();
+    await tester.pumpAndSettle();
+
+    final deleteButtonFinder = find.byKey(
+      const ValueKey('approval_step_detail_delete'),
+    );
+    final deleteButton = tester.widget<ShadButton>(deleteButtonFinder);
     deleteButton.onPressed?.call();
     await tester.pump();
     await tester.pumpAndSettle();
 
-    await tester.tap(find.widgetWithText(ShadButton, '삭제').last);
-    await tester.pump();
-    await tester.pumpAndSettle();
-
     verify(() => repository.delete(501)).called(1);
+    expect(find.text('결재 단계를 삭제했습니다.'), findsOneWidget);
   });
 
-  testWidgets('복구 버튼 확인 후 저장소 복구를 호출한다', (tester) async {
+  testWidgets('상세 다이얼로그에서 삭제된 단계를 복구한다', (tester) async {
     dotenv.testLoad(fileInput: 'FEATURE_APPROVALS_ENABLED=true\n');
     repository = _MockApprovalStepRepository();
     GetIt.I.registerLazySingleton<ApprovalStepRepository>(() => repository);
@@ -343,22 +360,35 @@ void main() {
       ),
     );
 
+    when(
+      () => repository.fetchDetail(any()),
+    ).thenAnswer((_) async => deletedRecord);
     when(() => repository.restore(any())).thenAnswer((_) async => record);
 
     await tester.pumpWidget(_buildApp(const ApprovalStepPage()));
     await tester.pump();
     await tester.pumpAndSettle();
 
-    final restoreFinder = find.byKey(const ValueKey('step_restore_501_1'));
-    final restoreButton = tester.widget<ShadButton>(restoreFinder);
+    await tester.tap(find.text('APP-2024-0001'));
+    await tester.pump();
+    await tester.pumpAndSettle();
+
+    final tabsState =
+        tester.state(find.byWidgetPredicate((widget) => widget is ShadTabs))
+            as dynamic;
+    tabsState.controller.select('restore');
+    await tester.pump();
+    await tester.pumpAndSettle();
+
+    final restoreButtonFinder = find.byKey(
+      const ValueKey('approval_step_detail_restore'),
+    );
+    final restoreButton = tester.widget<ShadButton>(restoreButtonFinder);
     restoreButton.onPressed?.call();
     await tester.pump();
     await tester.pumpAndSettle();
 
-    await tester.tap(find.widgetWithText(ShadButton, '복구').last);
-    await tester.pump();
-    await tester.pumpAndSettle();
-
     verify(() => repository.restore(501)).called(1);
+    expect(find.text('결재 단계를 복구했습니다.'), findsOneWidget);
   });
 }