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/company_form.dart

@@ -16,7 +16,7 @@ import 'package:flutter/material.dart';
 // import 'package:superport/models/address_model.dart'; // 사용되지 않는 import
 import 'package:superport/models/company_model.dart';
 // import 'package:superport/screens/common/custom_widgets.dart'; // 사용되지 않는 import
-import 'package:superport/screens/common/theme_tailwind.dart';
+import 'package:superport/screens/common/theme_shadcn.dart';
 import 'package:superport/screens/company/controllers/company_form_controller.dart';
 // import 'package:superport/screens/company/widgets/branch_card.dart'; // 사용되지 않는 import
 import 'package:superport/screens/company/widgets/company_form_header.dart';
@@ -48,7 +48,7 @@ class CompanyTypeSelector extends StatelessWidget {
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
-          Text('회사 유형', style: AppThemeTailwind.formLabelStyle),
+          Text('회사 유형', style: ShadcnTheme.labelMedium),
           const SizedBox(height: 8),
           Row(
             children: [
@@ -357,7 +357,7 @@ class _CompanyFormScreenState extends State<CompanyFormScreen> {
                   child: ElevatedButton(
                     onPressed: _saveCompany,
                     style: ElevatedButton.styleFrom(
-                      backgroundColor: AppThemeTailwind.primary,
+                      backgroundColor: ShadcnTheme.primary,
                       minimumSize: const Size.fromHeight(48),
                       shape: RoundedRectangleBorder(
                         borderRadius: BorderRadius.circular(8),
@@ -463,7 +463,7 @@ class _CompanyFormScreenState extends State<CompanyFormScreen> {
                         padding: const EdgeInsets.only(top: 16.0, bottom: 8.0),
                         child: Text(
                           '지점 정보',
-                          style: AppThemeTailwind.subheadingStyle,
+                          style: ShadcnTheme.headingH6,
                         ),
                       ),
                     if (_controller.branchControllers.isNotEmpty)
@@ -507,7 +507,7 @@ class _CompanyFormScreenState extends State<CompanyFormScreen> {
                     child: ElevatedButton(
                       onPressed: _saveCompany,
                       style: ElevatedButton.styleFrom(
-                        backgroundColor: AppThemeTailwind.primary,
+                        backgroundColor: ShadcnTheme.primary,
                         minimumSize: const Size.fromHeight(48),
                         shape: RoundedRectangleBorder(
                           borderRadius: BorderRadius.circular(8),