fix: 修改客服，增加sdk使用；增加邀请链接短链，升级flutter到3.35.0，Dart 3.9.0

lib/app/services/iap/iap_pending_order_service.dart

@@ -1,29 +1,42 @@
-import 'package:flutter_keychain/flutter_keychain.dart';
+import 'package:flutter_secure_storage/flutter_secure_storage.dart';
 
 class IAPPendingOrderService {
   static const _keyOrderNo = 'hi_iap_pending_order_no';
   static const _keyJwsData = 'hi_iap_pending_jws_data'; // 新增 Key
 
+  // 创建统一存储实例
+  static final _storage = FlutterSecureStorage(
+    aOptions: const AndroidOptions(
+      encryptedSharedPreferences: true, // Android 加密存储
+    ),
+    iOptions: const IOSOptions(
+      accessibility: KeychainAccessibility.first_unlock, // iOS Keychain
+    ),
+  );
+
+  /// 存储待处理订单号
   static Future<void> setPendingOrderNo(String orderNo) async {
-    await FlutterKeychain.put(key: _keyOrderNo, value: orderNo);
+    await _storage.write(key: _keyOrderNo, value: orderNo);
   }
 
+  /// 获取待处理订单号
   static Future<String?> getPendingOrderNo() async {
-    return await FlutterKeychain.get(key: _keyOrderNo);
+    return await _storage.read(key: _keyOrderNo);
   }
 
   /// 存储 JWS 凭证数据
   static Future<void> setPendingJwsData(String jwsData) async {
-    await FlutterKeychain.put(key: _keyJwsData, value: jwsData);
+    await _storage.write(key: _keyJwsData, value: jwsData);
   }
 
   /// 获取存储的 JWS 凭证数据
   static Future<String?> getPendingJwsData() async {
-    return await FlutterKeychain.get(key: _keyJwsData);
+    return await _storage.read(key: _keyJwsData);
   }
 
+  /// 清除待处理订单和 JWS 数据
   static Future<void> clearPendingOrderNo() async {
-    await FlutterKeychain.remove(key: _keyOrderNo);
-    await FlutterKeychain.remove(key: _keyJwsData);
+    await _storage.delete(key: _keyOrderNo);
+    await _storage.delete(key: _keyJwsData);
   }
 }