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/equipment/equipment_in_form.dart

@@ -3,7 +3,7 @@ import 'package:flutter/services.dart';
 import 'package:provider/provider.dart';
 // import 'package:superport/models/equipment_unified_model.dart';
 // import 'package:superport/screens/common/custom_widgets.dart' hide FormFieldWrapper;
-import 'package:superport/screens/common/theme_tailwind.dart';
+import 'package:superport/screens/common/theme_shadcn.dart';
 import 'package:superport/screens/common/templates/form_layout_template.dart';
 import 'package:superport/utils/constants.dart';
 // import 'package:flutter_localizations/flutter_localizations.dart';
@@ -2163,7 +2163,7 @@ class _EquipmentInFormScreenState extends State<EquipmentInFormScreen> {
                         children: [
                           Text(
                             '${_controller.inDate.year}-${_controller.inDate.month.toString().padLeft(2, '0')}-${_controller.inDate.day.toString().padLeft(2, '0')}',
-                            style: AppThemeTailwind.bodyStyle,
+                            style: ShadcnTheme.bodyMedium,
                           ),
                           const Icon(Icons.calendar_today, size: 20),
                         ],
@@ -2258,7 +2258,7 @@ class _EquipmentInFormScreenState extends State<EquipmentInFormScreen> {
                                   Expanded(
                                     child: Text(
                                       '${_controller.warrantyStartDate.year}-${_controller.warrantyStartDate.month.toString().padLeft(2, '0')}-${_controller.warrantyStartDate.day.toString().padLeft(2, '0')}',
-                                      style: AppThemeTailwind.bodyStyle,
+                                      style: ShadcnTheme.bodyMedium,
                                       overflow: TextOverflow.ellipsis,
                                     ),
                                   ),
@@ -2308,7 +2308,7 @@ class _EquipmentInFormScreenState extends State<EquipmentInFormScreen> {
                                   Expanded(
                                     child: Text(
                                       '${_controller.warrantyEndDate.year}-${_controller.warrantyEndDate.month.toString().padLeft(2, '0')}-${_controller.warrantyEndDate.day.toString().padLeft(2, '0')}',
-                                      style: AppThemeTailwind.bodyStyle,
+                                      style: ShadcnTheme.bodyMedium,
                                       overflow: TextOverflow.ellipsis,
                                     ),
                                   ),