feat: product variant

lib/presentation/home/models/order_request.dart

@@ -2,7 +2,7 @@ import 'dart:convert';
 
 class OrderRequestModel {
   final String? outletId;
-  final String? userId;
+  final String? customerId;
   final String? tableNumber;
   final String? tableId;
   final String? orderType;
@@ -12,7 +12,7 @@ class OrderRequestModel {
 
   OrderRequestModel({
     this.outletId,
-    this.userId,
+    this.customerId,
     this.tableNumber,
     this.tableId,
     this.orderType,
@@ -29,7 +29,7 @@ class OrderRequestModel {
   factory OrderRequestModel.fromMap(Map<String, dynamic> json) =>
       OrderRequestModel(
         outletId: json["outlet_id"],
-        userId: json["user_id"],
+        customerId: json["customer_id"],
         tableNumber: json["table_number"],
         tableId: json["table_id"],
         orderType: json["order_type"],
@@ -43,7 +43,7 @@ class OrderRequestModel {
 
   Map<String, dynamic> toMap() => {
         "outlet_id": outletId,
-        "user_id": userId,
+        "customer_id": customerId,
         "table_number": tableNumber,
         "table_id": tableId,
         "order_type": orderType,
@@ -57,12 +57,14 @@ class OrderRequestModel {
 
 class OrderItemRequest {
   final String? productId;
+  final String? productVariantId;
   final int? quantity;
   final int? unitPrice;
   final String? notes;
 
   OrderItemRequest({
     this.productId,
+    this.productVariantId,
     this.quantity,
     this.unitPrice,
     this.notes,
@@ -74,6 +76,7 @@ class OrderItemRequest {
   factory OrderItemRequest.fromMap(Map<String, dynamic> json) =>
       OrderItemRequest(
         productId: json["product_id"],
+        productVariantId: json["product_variant_id"],
         quantity: json["quantity"],
         unitPrice: json["unit_price"]?.toDouble(),
         notes: json["notes"],
@@ -81,6 +84,7 @@ class OrderItemRequest {
 
   Map<String, dynamic> toMap() => {
         "product_id": productId,
+        "product_variant_id": productVariantId,
         "quantity": quantity,
         "unit_price": unitPrice,
         "notes": notes,