feat(purchase): add currency code and actual price

-import 'dart:math';
-
-import 'package:doublefeel_flutter/core/constants/membership.dart';
-import 'package:doublefeel_flutter/core/logging/app_logger.dart';
 import 'package:doublefeel_flutter/core/network/api/pay_api.dart';
 import 'package:doublefeel_flutter/core/network/api/vip_api.dart';
 import 'package:doublefeel_flutter/core/result/app_result.dart';
@@ -92,6 +88,12 @@ class MembershipOfferController extends GetxController {
     trackMap['product_type'] = yearlyProduct.value?.appleId;
     trackMap['price'] = yearlyProduct.value?.price;
 
+    final appleInfo = yearlyProductAppleInfo.value;
+    trackMap['currency_code'] = appleInfo?.currencyCode ?? '';
+
+    var actualPrice = appleInfo?.price ?? 0;
+    trackMap['actual_price'] =  actualPrice > 0 ? actualPrice : (appleInfo?.originPrice ?? 0);
+
     ta.track(
       'success_doublefeel_pay_order',
       properties: trackMap,

@@ -31,6 +31,7 @@ class PurchasePlan {
     this.product,
     this.appleProductId,
     this.actualPrice,
+    this.appleProductInfo,
   });
 
   final String title;
@@ -42,6 +43,8 @@ class PurchasePlan {
 
   /// Real product price in cents, based on the Chinese price baseline.
   final int? actualPrice;
+
+  final AppleProductInfo? appleProductInfo;
 }
 
 class PurchaseController extends GetxController {
@@ -349,6 +352,7 @@ class PurchaseController extends GetxController {
       product: product,
       appleProductId: product.appleId,
       actualPrice: appleInfo == null ? null : _actualPrice(appleInfo),
+      appleProductInfo: appleInfo,
     );
   }
 
@@ -441,12 +445,18 @@ class PurchaseController extends GetxController {
 
   void _trackSuccessPayOrder() {
     final plan = _selectedPlan;
+    final appleInfo = plan?.appleProductInfo;
+    final actualPrice = appleInfo?.price ?? 0;
     ta.track(
       'success_doublefeel_pay_order',
       properties: {
         ..._baseAnalyticsProperties,
         'product_type': plan?.product?.appleId,
         'price': plan?.product?.price,
+        'currency_code': appleInfo?.currencyCode ?? '',
+        'actual_price': actualPrice > 0
+            ? actualPrice
+            : (appleInfo?.originPrice ?? 0),
       },
     );
   }