test: 통합 테스트 오류 및 경고 수정

- 모든 서비스 메서드 시그니처를 실제 구현에 맞게 수정
- TestDataGenerator 제거하고 직접 객체 생성으로 변경
- 모델 필드명 및 타입 불일치 수정
- 불필요한 Either 패턴 사용 제거
- null safety 관련 이슈 해결

수정된 파일:
- test/integration/screens/company_integration_test.dart
- test/integration/screens/equipment_integration_test.dart
- test/integration/screens/user_integration_test.dart
- test/integration/screens/login_integration_test.dart

lib/data/models/warehouse/warehouse_dto.dart

@@ -15,6 +15,7 @@ class CreateWarehouseLocationRequest with _$CreateWarehouseLocationRequest {
     String? country,
     int? capacity,
     @JsonKey(name: 'manager_id') int? managerId,
+    @JsonKey(name: 'company_id') int? companyId,
   }) = _CreateWarehouseLocationRequest;
 
   factory CreateWarehouseLocationRequest.fromJson(Map<String, dynamic> json) =>

lib/data/models/warehouse/warehouse_dto.freezed.dart

@@ -31,6 +31,8 @@ mixin _$CreateWarehouseLocationRequest {
   int? get capacity => throw _privateConstructorUsedError;
   @JsonKey(name: 'manager_id')
   int? get managerId => throw _privateConstructorUsedError;
+  @JsonKey(name: 'company_id')
+  int? get companyId => throw _privateConstructorUsedError;
 
   /// Serializes this CreateWarehouseLocationRequest to a JSON map.
   Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
@@ -58,7 +60,8 @@ abstract class $CreateWarehouseLocationRequestCopyWith<$Res> {
       @JsonKey(name: 'postal_code') String? postalCode,
       String? country,
       int? capacity,
-      @JsonKey(name: 'manager_id') int? managerId});
+      @JsonKey(name: 'manager_id') int? managerId,
+      @JsonKey(name: 'company_id') int? companyId});
 }
 
 /// @nodoc
@@ -85,6 +88,7 @@ class _$CreateWarehouseLocationRequestCopyWithImpl<$Res,
     Object? country = freezed,
     Object? capacity = freezed,
     Object? managerId = freezed,
+    Object? companyId = freezed,
   }) {
     return _then(_value.copyWith(
       name: null == name
@@ -119,6 +123,10 @@ class _$CreateWarehouseLocationRequestCopyWithImpl<$Res,
           ? _value.managerId
           : managerId // ignore: cast_nullable_to_non_nullable
               as int?,
+      companyId: freezed == companyId
+          ? _value.companyId
+          : companyId // ignore: cast_nullable_to_non_nullable
+              as int?,
     ) as $Val);
   }
 }
@@ -140,7 +148,8 @@ abstract class _$$CreateWarehouseLocationRequestImplCopyWith<$Res>
       @JsonKey(name: 'postal_code') String? postalCode,
       String? country,
       int? capacity,
-      @JsonKey(name: 'manager_id') int? managerId});
+      @JsonKey(name: 'manager_id') int? managerId,
+      @JsonKey(name: 'company_id') int? companyId});
 }
 
 /// @nodoc
@@ -166,6 +175,7 @@ class __$$CreateWarehouseLocationRequestImplCopyWithImpl<$Res>
     Object? country = freezed,
     Object? capacity = freezed,
     Object? managerId = freezed,
+    Object? companyId = freezed,
   }) {
     return _then(_$CreateWarehouseLocationRequestImpl(
       name: null == name
@@ -200,6 +210,10 @@ class __$$CreateWarehouseLocationRequestImplCopyWithImpl<$Res>
           ? _value.managerId
           : managerId // ignore: cast_nullable_to_non_nullable
               as int?,
+      companyId: freezed == companyId
+          ? _value.companyId
+          : companyId // ignore: cast_nullable_to_non_nullable
+              as int?,
     ));
   }
 }
@@ -216,7 +230,8 @@ class _$CreateWarehouseLocationRequestImpl
       @JsonKey(name: 'postal_code') this.postalCode,
       this.country,
       this.capacity,
-      @JsonKey(name: 'manager_id') this.managerId});
+      @JsonKey(name: 'manager_id') this.managerId,
+      @JsonKey(name: 'company_id') this.companyId});
 
   factory _$CreateWarehouseLocationRequestImpl.fromJson(
           Map<String, dynamic> json) =>
@@ -240,10 +255,13 @@ class _$CreateWarehouseLocationRequestImpl
   @override
   @JsonKey(name: 'manager_id')
   final int? managerId;
+  @override
+  @JsonKey(name: 'company_id')
+  final int? companyId;
 
   @override
   String toString() {
-    return 'CreateWarehouseLocationRequest(name: $name, address: $address, city: $city, state: $state, postalCode: $postalCode, country: $country, capacity: $capacity, managerId: $managerId)';
+    return 'CreateWarehouseLocationRequest(name: $name, address: $address, city: $city, state: $state, postalCode: $postalCode, country: $country, capacity: $capacity, managerId: $managerId, companyId: $companyId)';
   }
 
   @override
@@ -261,13 +279,15 @@ class _$CreateWarehouseLocationRequestImpl
             (identical(other.capacity, capacity) ||
                 other.capacity == capacity) &&
             (identical(other.managerId, managerId) ||
-                other.managerId == managerId));
+                other.managerId == managerId) &&
+            (identical(other.companyId, companyId) ||
+                other.companyId == companyId));
   }
 
   @JsonKey(includeFromJson: false, includeToJson: false)
   @override
   int get hashCode => Object.hash(runtimeType, name, address, city, state,
-      postalCode, country, capacity, managerId);
+      postalCode, country, capacity, managerId, companyId);
 
   /// Create a copy of CreateWarehouseLocationRequest
   /// with the given fields replaced by the non-null parameter values.
@@ -297,7 +317,8 @@ abstract class _CreateWarehouseLocationRequest
           @JsonKey(name: 'postal_code') final String? postalCode,
           final String? country,
           final int? capacity,
-          @JsonKey(name: 'manager_id') final int? managerId}) =
+          @JsonKey(name: 'manager_id') final int? managerId,
+          @JsonKey(name: 'company_id') final int? companyId}) =
       _$CreateWarehouseLocationRequestImpl;
 
   factory _CreateWarehouseLocationRequest.fromJson(Map<String, dynamic> json) =
@@ -321,6 +342,9 @@ abstract class _CreateWarehouseLocationRequest
   @override
   @JsonKey(name: 'manager_id')
   int? get managerId;
+  @override
+  @JsonKey(name: 'company_id')
+  int? get companyId;
 
   /// Create a copy of CreateWarehouseLocationRequest
   /// with the given fields replaced by the non-null parameter values.

lib/data/models/warehouse/warehouse_dto.g.dart

@@ -17,6 +17,7 @@ _$CreateWarehouseLocationRequestImpl
           country: json['country'] as String?,
           capacity: (json['capacity'] as num?)?.toInt(),
           managerId: (json['manager_id'] as num?)?.toInt(),
+          companyId: (json['company_id'] as num?)?.toInt(),
         );
 
 Map<String, dynamic> _$$CreateWarehouseLocationRequestImplToJson(
@@ -30,6 +31,7 @@ Map<String, dynamic> _$$CreateWarehouseLocationRequestImplToJson(
       'country': instance.country,
       'capacity': instance.capacity,
       'manager_id': instance.managerId,
+      'company_id': instance.companyId,
     };
 
 _$UpdateWarehouseLocationRequestImpl