feat: Flexion 先验签后消费支付流程 + playerId 绑定

实现 Flexion 渠道支付验签重构：支付成功后不立即消费，将 purchaseJson/signature/purchaseToken
回调至 Unity，由服务端 SHA1withRSA 验签并校验 developerPayload.playerId 后再调用 consume。
同步更新 SDKManager 接口、UnityBridgeFunc 桥接、TYSdkModel 字段及 ExtraPluginCfgs。

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

sdk-intergration/Assets/Scripts/SDKTest.cs

@@ -62,6 +62,9 @@ public class SDKTest : MonoBehaviour
 
     [SerializeField]
     private Text _messageTxt;
+    
+    [SerializeField] 
+    private Text _titleText;
 
     void Start()
     {
@@ -71,6 +74,7 @@ public class SDKTest : MonoBehaviour
         GContext.container.RegisterInstance<IConfig>(config);
 
         Debug.Log("SDKTest Start");
+        UpdateChannelTitle();
         //===============================================================================
         //======================      Test Server             ===========================
         // UnityBridgeFunc.UnityResetServerUrl("https://128-hwsfsdk-sdk-test01.qijihdhk.com");
@@ -130,6 +134,18 @@ public class SDKTest : MonoBehaviour
         UnityBridgeFunc.UnityResetServerUrl("https://128-hwsfsdk-sdk-test01.qijihdhk.com");
     }
 
+    private void UpdateChannelTitle()
+    {
+#if UNITY_ANDROID
+        using (var cls = new AndroidJavaClass("com.unity3d.player.ChannelHelpers"))
+        {
+            string channel = cls.GetStatic<string>("CHANNEL");
+            Debug.Log($"[SDKTest] Channel from Java: {channel}");
+            _titleText.text = $" {channel}";
+        }
+#endif
+    }
+
     int retryAttempt;
 
     public void InitializeRewardedAds()
@@ -161,6 +177,7 @@ public class SDKTest : MonoBehaviour
         _messageTxt.text = $"Login:  {info.isSuccess}";
         if (info.isSuccess)
         {
+            _messageTxt.text += $" UserId:{info.userId}";
             _messageTxt.text += $"\n{info.msg}";
             _messageTxt.text += $"\n{TYSdkFacade.TYAccountInfo.token}";
         }
@@ -187,10 +204,23 @@ public class SDKTest : MonoBehaviour
     public async void OnPayTestBtn()
     {
         _messageTxt.text = "";
+
+        if (ChannelConfig.Channel.Equals("Flexion"))
+        {
+            sku = new SKUDetail
+            {
+                productId = "com.arkgame.ft.pack0199",
+                ourProductId = "com.arkgame.ft.pack0199",
+                price = "1.99",
+                price_amount_micros = "1990000",
+                title = "Flexion Test Pack",
+                type = "inapp"
+            };
+        }
         if (sku == null){
             _messageTxt.text = "no product";
             return;
-        } 
+        }
 
 #if !UNITY_EDITOR && UNITY_IOS
         sku.productId = "comarkgameftpack0199";
@@ -201,7 +231,7 @@ public class SDKTest : MonoBehaviour
         var purchaseInfo = new JObject();
         purchaseInfo["pfid"] = "TestPlayer";
         purchaseInfo["customData"] =  "{\"test\":\"test\"}";
-
+        purchaseInfo["playerId"] = TYSdkFacade.TYAccountInfo.strUserId;
 
         PaymentInfo payResult = await TYSdkFacade.Instance.Pay(sku, 1, sku.ProdPrice, purchaseInfo);
         _messageTxt.text = "\n" + $"Success : {payResult.isSuccess}";
@@ -220,6 +250,7 @@ public class SDKTest : MonoBehaviour
             _messageTxt.text = "products count:::" + result.products.Count;
             _messageTxt.text += "\n" + result.products[0].ToString();
             sku = result.products[0];
+            Debug.Log($"Sku -> {sku}");
         }
         else
         {