feat: V/R 유지보수 시스템 전환 및 대시보드 테이블 형태 완성

- V/R 시스템 완전 전환: WARRANTY/CONTRACT/INSPECTION → V(방문)/R(원격)
- 유지보수 대시보드 카드 → StandardDataTable 테이블 형태 전환
- "조회중..." 문제 해결: 백엔드 직접 필드 사용 (equipment_model, company_name)
- MaintenanceDto 신규 필드 추가: company_id, company_name, equipment_serial, equipment_model
- preloadEquipmentData 비활성화로 불필요한 equipment-history API 호출 제거
- CO-STAR 프레임워크 적용 및 CLAUDE.md v3.0 업데이트
- Flutter Analyze ERROR: 0 유지, 100% shadcn_ui 컴플라이언스

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

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

lib/domain/usecases/maintenance_usecase.dart

@@ -154,37 +154,33 @@ class MaintenanceUseCase {
     final maintenances = allDataResponse.items;
     
     int activeCount = maintenances.where((m) => m.isActive).length;
-    int warrantyCount = maintenances.where((m) => m.maintenanceType == MaintenanceType.warranty).length;
-    int contractCount = maintenances.where((m) => m.maintenanceType == MaintenanceType.contract).length;
-    int inspectionCount = maintenances.where((m) => m.maintenanceType == MaintenanceType.inspection).length;
+    int visitCount = maintenances.where((m) => m.maintenanceType == MaintenanceType.visit).length;
+    int remoteCount = maintenances.where((m) => m.maintenanceType == MaintenanceType.remote).length;
     int expiredCount = maintenances.where((m) => m.isExpired).length;
     
     return MaintenanceStatistics(
       totalCount: totalCount,
       activeCount: activeCount,
-      warrantyCount: warrantyCount,
-      contractCount: contractCount,
-      inspectionCount: inspectionCount,
+      visitCount: visitCount,
+      remoteCount: remoteCount,
       expiredCount: expiredCount,
     );
   }
 }
 
-/// 유지보수 통계 모델
+/// 유지보수 통계 모델 (V/R 시스템)
 class MaintenanceStatistics {
   final int totalCount;
   final int activeCount;
-  final int warrantyCount;    // 무상 보증
-  final int contractCount;    // 유상 계약
-  final int inspectionCount;  // 점검
+  final int visitCount;       // 방문 유지보수
+  final int remoteCount;      // 원격 유지보수
   final int expiredCount;     // 만료된 것
   
   MaintenanceStatistics({
     required this.totalCount,
     required this.activeCount,
-    required this.warrantyCount,
-    required this.contractCount,
-    required this.inspectionCount,
+    required this.visitCount,
+    required this.remoteCount,
     required this.expiredCount,
   });
 }