feat: product

lib/domain/product/entities/product_entity.dart

@@ -0,0 +1,43 @@
+part of '../product.dart';
+
+@freezed
+class Product with _$Product {
+  const factory Product({
+    required String id,
+    required String organizationId,
+    required String categoryId,
+    required String sku,
+    required String name,
+    required String description,
+    required int price,
+    required int cost,
+    required String businessType,
+    required String imageUrl,
+    required String printerType,
+    required Map<String, dynamic> metadata,
+    required bool isActive,
+    required DateTime createdAt,
+    required DateTime updatedAt,
+    required List<ProductVariant> variants,
+  }) = _Product;
+
+  /// ✅ factory kosong untuk default state
+  factory Product.empty() => Product(
+    id: '',
+    organizationId: '',
+    categoryId: '',
+    sku: '',
+    name: '',
+    description: '',
+    price: 0,
+    cost: 0,
+    businessType: '',
+    imageUrl: '',
+    printerType: '',
+    metadata: {},
+    isActive: false,
+    createdAt: DateTime.now(),
+    updatedAt: DateTime.now(),
+    variants: [],
+  );
+}

lib/domain/product/entities/product_variant_entity.dart

@@ -0,0 +1,26 @@
+part of '../product.dart';
+
+@freezed
+class ProductVariant with _$ProductVariant {
+  const factory ProductVariant({
+    required String id,
+    required String productId,
+    required String name,
+    required int priceModifier,
+    required int cost,
+    required Map<String, dynamic> metadata,
+    required DateTime createdAt,
+    required DateTime updatedAt,
+  }) = _ProductVariant;
+
+  factory ProductVariant.empty() => ProductVariant(
+    id: '',
+    productId: '',
+    name: '',
+    priceModifier: 0,
+    cost: 0,
+    metadata: {},
+    createdAt: DateTime.now(),
+    updatedAt: DateTime.now(),
+  );
+}