fix(UIManager): 为池复用路径分配独立的请求序列号

池复用时不再传固定 -1，改为分配新的 serialId，使每次打开请求可观测。

Author: AlianBlank

Runtime/UIManager.Open.cs

@@ -100,8 +100,9 @@ protected override async Task<IUIForm> InnerOpenUIFormAsync(string uiFormAssetPa
             var uiFormInstanceObject = m_InstancePool.Spawn(assetPath);
             if (uiFormInstanceObject != null)
             {
-                // 如果对象池存在
-                return InternalOpenUIForm(-1, uiFormAssetPath, uiFormAssetName, uiFormType, uiFormInstanceObject.Target, pauseCoveredUIForm, false, 0f, userData, isFullScreen);
+                // 池复用也分配新的请求序列号，确保每次打开请求可观测。
+                int serialId = ++m_Serial;
+                return InternalOpenUIForm(serialId, uiFormAssetPath, uiFormAssetName, uiFormType, uiFormInstanceObject.Target, pauseCoveredUIForm, false, 0f, userData, isFullScreen);
             }
 
             var uiForm = InnerLoadUIFormAsync(uiFormAssetPath, uiFormType, pauseCoveredUIForm, userData, isFullScreen, uiFormAssetName, assetPath);