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/data/models/maintenance_stats_dto.g.dart

@@ -0,0 +1,74 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'maintenance_stats_dto.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+_$MaintenanceStatsDtoImpl _$$MaintenanceStatsDtoImplFromJson(
+        Map<String, dynamic> json) =>
+    _$MaintenanceStatsDtoImpl(
+      activeContracts: (json['active_contracts'] as num?)?.toInt() ?? 0,
+      totalContracts: (json['total_contracts'] as num?)?.toInt() ?? 0,
+      expiring60Days: (json['expiring_60_days'] as num?)?.toInt() ?? 0,
+      expiring30Days: (json['expiring_30_days'] as num?)?.toInt() ?? 0,
+      expiring7Days: (json['expiring_7_days'] as num?)?.toInt() ?? 0,
+      expiredContracts: (json['expired_contracts'] as num?)?.toInt() ?? 0,
+      visitContracts: (json['visit_contracts'] as num?)?.toInt() ?? 0,
+      remoteContracts: (json['remote_contracts'] as num?)?.toInt() ?? 0,
+      upcomingVisits: (json['upcoming_visits'] as num?)?.toInt() ?? 0,
+      overdueMaintenances: (json['overdue_maintenances'] as num?)?.toInt() ?? 0,
+      totalRevenueAtRisk:
+          (json['total_revenue_at_risk'] as num?)?.toDouble() ?? 0.0,
+      completionRate: (json['completion_rate'] as num?)?.toDouble() ?? 0.0,
+      updatedAt: json['updated_at'] == null
+          ? null
+          : DateTime.parse(json['updated_at'] as String),
+    );
+
+Map<String, dynamic> _$$MaintenanceStatsDtoImplToJson(
+        _$MaintenanceStatsDtoImpl instance) =>
+    <String, dynamic>{
+      'active_contracts': instance.activeContracts,
+      'total_contracts': instance.totalContracts,
+      'expiring_60_days': instance.expiring60Days,
+      'expiring_30_days': instance.expiring30Days,
+      'expiring_7_days': instance.expiring7Days,
+      'expired_contracts': instance.expiredContracts,
+      'visit_contracts': instance.visitContracts,
+      'remote_contracts': instance.remoteContracts,
+      'upcoming_visits': instance.upcomingVisits,
+      'overdue_maintenances': instance.overdueMaintenances,
+      'total_revenue_at_risk': instance.totalRevenueAtRisk,
+      'completion_rate': instance.completionRate,
+      'updated_at': instance.updatedAt?.toIso8601String(),
+    };
+
+_$MaintenanceStatusCardDataImpl _$$MaintenanceStatusCardDataImplFromJson(
+        Map<String, dynamic> json) =>
+    _$MaintenanceStatusCardDataImpl(
+      title: json['title'] as String,
+      count: (json['count'] as num).toInt(),
+      subtitle: json['subtitle'] as String,
+      status: $enumDecode(_$MaintenanceCardStatusEnumMap, json['status']),
+      actionLabel: json['actionLabel'] as String?,
+    );
+
+Map<String, dynamic> _$$MaintenanceStatusCardDataImplToJson(
+        _$MaintenanceStatusCardDataImpl instance) =>
+    <String, dynamic>{
+      'title': instance.title,
+      'count': instance.count,
+      'subtitle': instance.subtitle,
+      'status': _$MaintenanceCardStatusEnumMap[instance.status]!,
+      'actionLabel': instance.actionLabel,
+    };
+
+const _$MaintenanceCardStatusEnumMap = {
+  MaintenanceCardStatus.active: 'active',
+  MaintenanceCardStatus.warning: 'warning',
+  MaintenanceCardStatus.urgent: 'urgent',
+  MaintenanceCardStatus.critical: 'critical',
+  MaintenanceCardStatus.expired: 'expired',
+};