feat：优化下单速度

feat：处理读卡密码

lib/common/models/api/hard_api_models.dart

@@ -397,6 +397,9 @@ class ServiceHardware extends ServiceBase {
   /// 人脸activeKey
   final String? faceActiveKey;
 
+  /// 商户饭卡密码 B（mch_manage.card_key，6 字节 hex）；由 /hard-api/ad 终端接口下发。
+  final String? cardKey;
+
   ServiceHardware({
     this.id,
     this.name,
@@ -417,6 +420,7 @@ class ServiceHardware extends ServiceBase {
     this.faceAppId,
     this.faceSdkKey,
     this.faceActiveKey,
+    this.cardKey,
   });
 
   factory ServiceHardware.fromJson(Map<String, dynamic> json) =>