refactor: UI 화면 통합 및 불필요한 파일 정리

- 모든 *_redesign.dart 파일을 기본 화면 파일로 통합
- 백업용 컨트롤러 파일들 제거 (*_controller.backup.dart)
- 사용하지 않는 예제 및 테스트 파일 제거
- Clean Architecture 적용 후 남은 정리 작업 완료
- 테스트 코드 정리 및 구조 개선 준비

🤖 Generated with [Claude Code](https://claude.ai/code)

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

lib/screens/company/widgets/branch_card.dart

@@ -3,7 +3,7 @@ import 'package:flutter/services.dart';
 import 'package:superport/models/address_model.dart';
 import 'package:superport/models/company_model.dart';
 import 'package:superport/screens/common/custom_widgets.dart';
-import 'package:superport/screens/common/theme_tailwind.dart';
+import 'package:superport/screens/common/theme_shadcn.dart';
 import 'package:superport/screens/common/widgets/address_input.dart';
 import 'package:superport/screens/company/widgets/contact_info_widget.dart';
 import 'package:superport/utils/validators.dart';
@@ -81,7 +81,7 @@ class _BranchCardState extends State<BranchCard> {
                 children: [
                   Text(
                     '지점 #${widget.index + 1}',
-                    style: AppThemeTailwind.subheadingStyle,
+                    style: ShadcnTheme.headingH6,
                   ),
                   IconButton(
                     icon: const Icon(Icons.delete, color: Colors.red),

lib/screens/company/widgets/company_form_header.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:superport/models/address_model.dart';
 import 'package:superport/screens/common/custom_widgets.dart';
-import 'package:superport/screens/common/theme_tailwind.dart';
+import 'package:superport/screens/common/theme_shadcn.dart';
 import 'package:superport/screens/common/widgets/address_input.dart';
 import 'package:superport/utils/validators.dart';
 import 'package:superport/screens/company/widgets/company_name_autocomplete.dart';

lib/screens/company/widgets/map_dialog.dart

@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:superport/screens/common/theme_tailwind.dart';
+import 'package:superport/screens/common/theme_shadcn.dart';
 
 /// 주소에 대한 지도 대화상자를 표시합니다.
 class MapDialog extends StatelessWidget {
@@ -68,7 +68,7 @@ class MapDialog extends StatelessWidget {
                       Icon(
                         Icons.map,
                         size: 64,
-                        color: AppThemeTailwind.primary,
+                        color: ShadcnTheme.primary,
                       ),
                       const SizedBox(height: 16),
                       Text(