refactor: 支付链路规范化 — 统一命名/层次/传参

- ISDKHelper.pay() 增加 productPrice 参数，与 UnityKnowNew 签名对齐
- FlexionSDKHelper: prodPrice/prodCount 从参数直接写入 developerPayload
- playerId → userId 统一命名 (SDKTest/Java payload)
- pfId → pfid 统一小写 (服务端 JSON key)
- PaymentInfo 序列化替代 StringBuilder 手拼 JSON
- FlexionPaymentVerifier.Consume 走 UnityBridgeFunc.ConsumePurchase 桥接层
- UnityBridgeFunc 新增 ConsumePurchase 通用方法，移除渠道特定方法
- SDKManager.ConsumeFlexionPurchase → ConsumePurchase 通用化

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

sdk-intergration/Packages/tysdk/Runtime/PaymentVerifier.cs

@@ -1,7 +1,7 @@
 using System;
-using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
+using Newtonsoft.Json;
 using UnityEngine;
 using UnityEngine.Networking;
 
@@ -90,20 +90,21 @@ namespace tysdk
                     Debug.Log($"[FlexionPaymentVerifier] HTTP retry {attempt}/{MaxRetries}, waiting {delay.TotalSeconds}s");
                     await Task.Delay(delay);
                 }
-                lastResult = await SendVerifyRequest(BuildRequestBody(info));
+                lastResult = await SendVerifyRequest(info);
                 if (lastResult.success) return lastResult;
                 Debug.LogWarning($"[FlexionPaymentVerifier] HTTP attempt {attempt + 1} failed: {lastResult.msg}");
             }
             return lastResult;
         }
 
-        private async Task<VerifyResult> SendVerifyRequest(string body)
+        private async Task<VerifyResult> SendVerifyRequest(PaymentInfo info)
         {
             var cts = new CancellationTokenSource(Timeout);
             try
             {
                 Debug.Log("[FlexionPaymentVerifier] Sending verification request");
 
+                var body = JsonConvert.SerializeObject(info);
                 using var req = new UnityWebRequest(VERIFY_URL, "POST");
                 req.uploadHandler = new UploadHandlerRaw(Encoding.UTF8.GetBytes(body));
                 req.downloadHandler = new DownloadHandlerBuffer();
@@ -139,35 +140,15 @@ namespace tysdk
                 cts.Dispose();
             }
         }
-
-        private static string BuildRequestBody(PaymentInfo info)
-        {
-            var body = new StringBuilder();
-            body.Append('{');
-            body.Append("\"purchaseJson\":").Append(Escape(info.purchaseJson)).Append(',');
-            body.Append("\"signature\":").Append(Escape(info.signature)).Append(',');
-            body.Append("\"orderId\":").Append(Escape(info.orderId)).Append(',');
-            body.Append("\"productId\":").Append(Escape(info.productId)).Append(',');
-            body.Append("\"purchaseToken\":").Append(Escape(info.purchaseToken));
-            body.Append('}');
-            return body.ToString();
-        }
 #endif
 
-        private static string Escape(string s)
-        {
-            if (s == null) return "null";
-            return '"' + s.Replace("\\", "\\\\").Replace("\"", "\\\"") + '"';
-        }
-
 #if UNITY_EDITOR
         public void Consume(string token) { }
 #elif UNITY_ANDROID
         public void Consume(string token)
         {
             if (string.IsNullOrEmpty(token)) return;
-            using var sdkManager = new AndroidJavaClass("com.unity3d.player.SDKManager");
-            sdkManager.CallStatic("ConsumeFlexionPurchase", token);
+            UnityBridgeFunc.ConsumePurchase(token);
         }
 #endif
     }