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_dto.dart

@@ -14,7 +14,7 @@ class MaintenanceDto with _$MaintenanceDto {
     @JsonKey(name: 'started_at') required DateTime startedAt,
     @JsonKey(name: 'ended_at') required DateTime endedAt,
     @JsonKey(name: 'period_month') @Default(1) int periodMonth,
-    @JsonKey(name: 'maintenance_type') @Default('WARRANTY') String maintenanceType, // WARRANTY|CONTRACT|INSPECTION
+    @JsonKey(name: 'maintenance_type') @Default('V') String maintenanceType, // V: 방문, R: 원격
     @JsonKey(name: 'is_deleted') @Default(false) bool isDeleted,
     @JsonKey(name: 'registered_at') required DateTime registeredAt,
     @JsonKey(name: 'updated_at') DateTime? updatedAt,
@@ -22,6 +22,8 @@ class MaintenanceDto with _$MaintenanceDto {
     // 백엔드 추가 필드들 (계산된 값)
     @JsonKey(name: 'equipment_serial') String? equipmentSerial,
     @JsonKey(name: 'equipment_model') String? equipmentModel,
+    @JsonKey(name: 'company_id') int? companyId,
+    @JsonKey(name: 'company_name') String? companyName,
     @JsonKey(name: 'days_remaining') int? daysRemaining,
     @JsonKey(name: 'is_expired') @Default(false) bool isExpired,
     
@@ -43,7 +45,7 @@ class MaintenanceRequestDto with _$MaintenanceRequestDto {
     @JsonKey(name: 'started_at') required DateTime startedAt,
     @JsonKey(name: 'ended_at') required DateTime endedAt,
     @JsonKey(name: 'period_month') @Default(1) int periodMonth,
-    @JsonKey(name: 'maintenance_type') @Default('WARRANTY') String maintenanceType, // WARRANTY|CONTRACT|INSPECTION
+    @JsonKey(name: 'maintenance_type') @Default('V') String maintenanceType, // V: 방문, R: 원격
   }) = _MaintenanceRequestDto;
 
   factory MaintenanceRequestDto.fromJson(Map<String, dynamic> json) =>
@@ -93,30 +95,26 @@ class MaintenanceQueryDto with _$MaintenanceQueryDto {
       _$MaintenanceQueryDtoFromJson(json);
 }
 
-// Maintenance Type 헬퍼 (백엔드와 일치)
+// Maintenance Type 헬퍼 (V/R 시스템)
 class MaintenanceType {
-  static const String warranty = 'WARRANTY';
-  static const String contract = 'CONTRACT';
-  static const String inspection = 'INSPECTION';
+  static const String visit = 'V';     // 방문 유지보수
+  static const String remote = 'R';    // 원격 유지보수
   
   static String getDisplayName(String type) {
     switch (type) {
-      case warranty:
-        return '무상 보증';
-      case contract:
-        return '유상 계약';
-      case inspection:
-        return '점검';
+      case visit:
+        return '방문';
+      case remote:
+        return '원격';
       default:
         return type;
     }
   }
   
-  static List<String> get allTypes => [warranty, contract, inspection];
+  static List<String> get allTypes => [visit, remote];
   
   static List<Map<String, String>> get typeOptions => [
-    {'value': warranty, 'label': '무상 보증'},
-    {'value': contract, 'label': '유상 계약'},
-    {'value': inspection, 'label': '점검'},
+    {'value': visit, 'label': '방문'},
+    {'value': remote, 'label': '원격'},
   ];
 }