feat: 장비 관리 기능 강화 및 이력 추적 개선

- EquipmentHistoryDto 모델 확장 (상세 정보 추가)
- 장비 이력 화면 UI/UX 개선
- 장비 입고 폼 검증 로직 강화
- 테스트 이력 화면 추가
- API 응답 처리 개선

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

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

lib/data/models/equipment/equipment_history_dto.dart

@@ -7,17 +7,17 @@ part 'equipment_history_dto.g.dart';
 class EquipmentHistoryDto with _$EquipmentHistoryDto {
   const factory EquipmentHistoryDto({
     required int id,
-    required int equipmentId,
-    required String transactionType,
+    @JsonKey(name: 'equipment_id') required int equipmentId,
+    @JsonKey(name: 'transaction_type') required String transactionType,
     required int quantity,
-    required DateTime transactionDate,
+    @JsonKey(name: 'transaction_date') required DateTime transactionDate,
     String? remarks,
-    int? createdBy,
-    int? userId,
-    required DateTime createdAt,
+    @JsonKey(name: 'created_by') int? createdBy,
+    @JsonKey(name: 'user_id') int? userId,
+    @JsonKey(name: 'created_at') required DateTime createdAt,
     // 추가 정보
-    String? userName,
-    String? performedBy,
+    @JsonKey(name: 'user_name') String? userName,
+    @JsonKey(name: 'performed_by') String? performedBy,
   }) = _EquipmentHistoryDto;
 
   factory EquipmentHistoryDto.fromJson(Map<String, dynamic> json) =>
@@ -27,11 +27,11 @@ class EquipmentHistoryDto with _$EquipmentHistoryDto {
 @freezed
 class CreateHistoryRequest with _$CreateHistoryRequest {
   const factory CreateHistoryRequest({
-    required String transactionType,
+    @JsonKey(name: 'transaction_type') required String transactionType,
     required int quantity,
-    DateTime? transactionDate,
+    @JsonKey(name: 'transaction_date') DateTime? transactionDate,
     String? remarks,
-    int? userId,
+    @JsonKey(name: 'user_id') int? userId,
   }) = _CreateHistoryRequest;
 
   factory CreateHistoryRequest.fromJson(Map<String, dynamic> json) =>