chore: 理顺 Core/Web 命名空间，并显式列出 Core 编译文件。

Co-authored-by: Cursor <cursoragent@cursor.com>

MAF1.Web/Web/AgentCatalog.cs

@@ -1,6 +1,6 @@
 using MAF1.PluginContract;
 
-namespace MAF1.Web;
+namespace MAF1.Web.Web;
 
 /// <summary>画布上一个端口的元数据，前端用来渲染圆点和检查器文案。</summary>
 public sealed class PortInfo

MAF1.Web/Web/AgentRuntime.cs

@@ -3,6 +3,7 @@ using MAF1.Agents.Weather;
 using MAF1.Plugins;
 using MAF1.Tools;
 using MAF1.Utils;
+using MAF1.Web.Web;
 using Microsoft.Agents.AI;
 using Microsoft.Extensions.Configuration;
 

MAF1.Web/Web/ConfigurableWorkflowRunner.cs

@@ -1,13 +1,13 @@
 using System.Text.Json;
-using MAF1.Agents;
 using MAF1.Agents.FileCity;
 using MAF1.Agents.Weather;
+using MAF1.Core.Agents;
 using MAF1.Decisions;
 using MAF1.PluginContract;
 using MAF1.Plugins;
 using Microsoft.Agents.AI;
 
-namespace MAF1.Web;
+namespace MAF1.Web.Web;
 
 /// <summary>
 /// 网页自己的图执行器（不是 Microsoft Agents AI Workflow）。