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/model/response/kr_user_info.dart

@@ -31,6 +31,7 @@ class KRUserInfo {
   final int referralPercentage;
   final bool onlyFirstPurchase;
   final int giftAmount;
+  final String shareUrl;
 
   // 新增 auth_methods 列表
   final List<KRAuthMethod> authMethods;
@@ -48,6 +49,7 @@ class KRUserInfo {
     this.referralPercentage = 0,
     this.onlyFirstPurchase = false,
     this.giftAmount = 0,
+    this.shareUrl = '',
     this.authMethods = const [],
   });
 
@@ -65,6 +67,7 @@ class KRUserInfo {
       referralPercentage: json['referral_percentage'] ?? 0,
       onlyFirstPurchase: json['only_first_purchase'] ?? false,
       giftAmount: json['gift_amount'] ?? 0,
+      shareUrl: json['share_link'] ?? '',
       authMethods: (json['auth_methods'] as List<dynamic>?)
           ?.map((e) => KRAuthMethod.fromJson(e))
           .toList() ??