fix(web): 修复并发请求时 MemoryStream 数据覆盖问题

移除共享的 m_MemoryStream 字段，改为每个请求使用局部 MemoryStream，
避免多个并发请求在 await 点交叉时互相覆盖响应数据。

GameFrameX/com.gameframex.unity#5

Author: AlianBlank

Runtime/Web/WebManager.Binary.cs

@@ -75,8 +75,6 @@ private void ShutdownBinary()
             }
 
             m_SendingBinaryList.Clear();
-
-            m_MemoryStream.Dispose();
         }
 
         /// <summary>
@@ -152,20 +150,12 @@ private async void MakeBinaryBytesRequest(WebBinaryData webData)
                 {
                     using (Stream responseStream = response.GetResponseStream())
                     {
-                        var transferEncoding = response.Headers.Get("Transfer-Encoding");
-                        if (string.IsNullOrWhiteSpace(transferEncoding))
-                        {
-                            m_MemoryStream.SetLength(response.ContentLength);
-                        }
-                        else
+                        using (var ms = new MemoryStream())
                         {
-                            m_MemoryStream.SetLength(0);
+                            await responseStream.CopyToAsync(ms);
+                            var resultData = ms.ToArray();
+                            webData.TaskSource.SetResult(new WebBufferResult(webData.UserData, resultData)); // 将流的内容复制到内存流中并转换为byte数组
                         }
-
-                        m_MemoryStream.Position = 0;
-                        await responseStream.CopyToAsync(m_MemoryStream);
-                        var resultData = m_MemoryStream.ToArray();
-                        webData.TaskSource.SetResult(new WebBufferResult(webData.UserData, resultData)); // 将流的内容复制到内存流中并转换为byte数组 
                     }
                 }
             }

Runtime/Web/WebManager.cs

@@ -27,9 +27,6 @@ public partial class WebManager : GameFrameworkModule, IWebManager
         // 正在处理的普通请求列表
         private readonly List<WebJsonData> m_SendingNormalList = new List<WebJsonData>(16);
 
-        // 用于存储请求和响应数据的内存流
-        private readonly MemoryStream m_MemoryStream;
-
         // JSON内容类型常量
         private const string JsonContentType = "application/json; charset=utf-8";
 
@@ -47,7 +44,6 @@ public partial class WebManager : GameFrameworkModule, IWebManager
         public WebManager()
         {
             MaxConnectionPerServer = 8;
-            m_MemoryStream = new MemoryStream();
             Timeout = 5f;
         }
 
@@ -126,7 +122,6 @@ protected override void Shutdown()
 
             m_SendingNormalList.Clear();
             ShutdownBinary();
-            m_MemoryStream.Dispose();
         }
 
         /// <summary>
@@ -419,14 +414,15 @@ private async void MakeJsonBytesRequest(WebJsonData webJsonData)
                 {
                     using (Stream responseStream = response.GetResponseStream())
                     {
-                        m_MemoryStream.SetLength(responseStream.Length);
-                        m_MemoryStream.Position = 0;
-                        await responseStream.CopyToAsync(m_MemoryStream);
-                        var resultData = m_MemoryStream.ToArray();
+                        using (var ms = new MemoryStream())
+                        {
+                            await responseStream.CopyToAsync(ms);
+                            var resultData = ms.ToArray();
 #if ENABLE_GAMEFRAMEX_WEB_RECEIVE_LOG
                         Log.Debug($"Web Response: {webJsonData.URL} \n Header: {GameFrameX.Runtime.Utility.Json.ToJson(webJsonData.Header)} \n  Form: {GameFrameX.Runtime.Utility.Json.ToJson(webJsonData.Form)} \n Content: {resultData}");
 #endif
-                        webJsonData.UniTaskCompletionBytesSource.SetResult(new WebBufferResult(webJsonData.UserData, resultData)); // 将流的内容复制到内存流中并转换为byte数组 
+                        webJsonData.UniTaskCompletionBytesSource.SetResult(new WebBufferResult(webJsonData.UserData, resultData)); // 将流的内容复制到内存流中并转换为byte数组
+                        }
                     }
                 }
             }