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/masters/customer/presentation/dialogs/customer_detail_dialog_test.dart

@@ -0,0 +1,91 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:intl/intl.dart' as intl;
+import 'package:superport_v2/features/masters/customer/domain/entities/customer.dart';
+import 'package:superport_v2/features/masters/customer/presentation/dialogs/customer_detail_dialog.dart';
+
+import '../../../../../helpers/test_app.dart';
+
+void main() {
+  final dateFormat = intl.DateFormat('yyyy-MM-dd HH:mm');
+
+  Future<Customer?> noopCreate(CustomerInput _) async => null;
+  Future<Customer?> noopUpdate(int _, CustomerInput __) async => null;
+  Future<bool> noopDelete(int _) async => false;
+  Future<Customer?> noopRestore(int _) async => null;
+
+  testWidgets('showCustomerDetailDialog 등록 모드 폼을 렌더링한다', (tester) async {
+    await tester.pumpWidget(buildTestApp(const SizedBox.shrink()));
+    final context = tester.element(find.byType(SizedBox));
+
+    unawaited(
+      showCustomerDetailDialog(
+        context: context,
+        dateFormat: dateFormat,
+        onCreate: noopCreate,
+        onUpdate: noopUpdate,
+        onDelete: noopDelete,
+        onRestore: noopRestore,
+      ),
+    );
+
+    await tester.pumpAndSettle();
+
+    expect(find.text('고객사 등록'), findsOneWidget);
+    expect(find.text('고객사코드'), findsOneWidget);
+    expect(find.text('유형'), findsOneWidget);
+    expect(find.text('등록'), findsWidgets);
+  });
+
+  testWidgets('showCustomerDetailDialog 상세 모드는 고객 요약을 표시한다', (tester) async {
+    await tester.binding.setSurfaceSize(const Size(1280, 800));
+    addTearDown(() => tester.binding.setSurfaceSize(null));
+
+    final customer = Customer(
+      id: 10,
+      customerCode: 'C-001',
+      customerName: '슈퍼고객',
+      contactName: '홍길동',
+      isPartner: true,
+      isGeneral: false,
+      email: 'customer@example.com',
+      mobileNo: '010-1111-2222',
+      zipcode: CustomerZipcode(
+        zipcode: '06000',
+        sido: '서울',
+        sigungu: '강남구',
+        roadName: '테헤란로',
+      ),
+      addressDetail: '101호',
+      isActive: true,
+      isDeleted: false,
+      note: 'VIP',
+      createdAt: DateTime(2024, 3, 1, 9),
+      updatedAt: DateTime(2024, 3, 2, 10),
+    );
+
+    await tester.pumpWidget(buildTestApp(const SizedBox.shrink()));
+    final context = tester.element(find.byType(SizedBox));
+
+    unawaited(
+      showCustomerDetailDialog(
+        context: context,
+        dateFormat: dateFormat,
+        customer: customer,
+        onCreate: noopCreate,
+        onUpdate: noopUpdate,
+        onDelete: noopDelete,
+        onRestore: noopRestore,
+      ),
+    );
+
+    await tester.pumpAndSettle();
+
+    expect(find.text('고객사 상세'), findsOneWidget);
+    expect(find.textContaining('슈퍼고객').first, findsOneWidget);
+    expect(find.text('고객사 코드'), findsWidgets);
+    expect(find.text('유형'), findsWidgets);
+  });
+}

test/features/masters/customer/presentation/pages/customer_page_test.dart

@@ -5,6 +5,7 @@ import 'package:get_it/get_it.dart';
 import 'package:mocktail/mocktail.dart';
 import 'package:shadcn_ui/shadcn_ui.dart';
 
+import '../../../../../helpers/tester_extensions.dart';
 import 'package:superport_v2/core/common/models/paginated_result.dart';
 import 'package:superport_v2/features/masters/customer/domain/entities/customer.dart';
 import 'package:superport_v2/features/masters/customer/domain/repositories/customer_repository.dart';
@@ -131,7 +132,7 @@ void main() {
 
       await tester.tap(find.text('신규 등록'));
       await tester.pumpAndSettle();
-      await tester.tap(find.text('등록'));
+      await tester.tapShadButton('등록', settle: false);
       await tester.pump();
 
       expect(find.text('고객사코드를 입력하세요.'), findsOneWidget);
@@ -174,7 +175,7 @@ void main() {
       await tester.enterText(fields.at(1), '검색 필요 고객');
       await tester.enterText(fields.at(4), '06000');
 
-      await tester.tap(find.text('등록'));
+      await tester.tapShadButton('등록', settle: false);
       await tester.pump();
 
       expect(find.text('검색 버튼을 눌러 주소를 선택하세요.'), findsOneWidget);
@@ -251,11 +252,10 @@ void main() {
       await tester.enterText(editableTexts.at(4), '02-0000-0000');
 
       // 유형 체크박스: 기본값 partner=false, general=true. partner on 추가
-      await tester.tap(find.text('파트너'));
+      await tester.tap(find.text('파트너'), warnIfMissed: false);
       await tester.pump();
 
-      await tester.tap(find.text('등록'));
-      await tester.pumpAndSettle();
+      await tester.tapShadButton('등록');
 
       expect(capturedInput, isNotNull);
       expect(capturedInput?.customerCode, 'C-100');