Signal 数据中心改为运行时加载 schema，解除 StandardScene 工程编译耦合。

加固 Config/Signal 路径解析，前端 DataCenter 表单类型与 API 对齐。

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

MiGu.Server/Signal/SignalModelSchemaResolver.cs

@@ -1,13 +1,12 @@
 using System.ComponentModel;
 using System.Reflection;
 using System.Text.Json.Serialization;
-using StandardScene.Signal.Model;
 
 namespace MiGu.Server.Signal;
 
 /// <summary>
-/// 从 StandardScene.Signal 程序集反射数据中心表和列。
-/// 优先使用 MiGu.Server 编译期引用的程序集；否则再从 SimpleLite plugins 加载。
+/// 从 Simple3 <c>plugins/StandardScene.Signal.dll</c> 反射数据中心表和列。
+/// 平台不编译引用该插件工程，避免仓外路径和 Windows TFM 耦合。
 /// </summary>
 public static class SignalModelSchemaResolver
 {
@@ -24,18 +23,19 @@ public static class SignalModelSchemaResolver
 
     public static IReadOnlyList<SignalTableDef> ResolveTables(string? pluginsDir, string? workingDirectory = null)
     {
-        var assembly = TryGetSignalAssembly(pluginsDir, workingDirectory);
-        if (assembly == null)
-            return Array.Empty<SignalTableDef>();
-
-        try
+        return WithSignalAssembly(pluginsDir, workingDirectory, assembly =>
         {
-            return BuildTablesFromAssembly(assembly);
-        }
-        catch
-        {
-            return Array.Empty<SignalTableDef>();
-        }
+            if (assembly == null)
+                return Array.Empty<SignalTableDef>();
+            try
+            {
+                return BuildTablesFromAssembly(assembly);
+            }
+            catch
+            {
+                return Array.Empty<SignalTableDef>();
+            }
+        });
     }
 
     public static IReadOnlyList<SignalColumn> ResolveColumns(string? modelName, string? pluginsDir, string? workingDirectory = null)
@@ -43,61 +43,76 @@ public static class SignalModelSchemaResolver
         if (string.IsNullOrWhiteSpace(modelName))
             return Array.Empty<SignalColumn>();
 
-        var assembly = TryGetSignalAssembly(pluginsDir, workingDirectory);
-        if (assembly == null)
-            return Array.Empty<SignalColumn>();
-
-        try
+        return WithSignalAssembly(pluginsDir, workingDirectory, assembly =>
         {
-            var type = assembly.GetType($"{ModelNamespace}.{modelName.Trim()}", throwOnError: false, ignoreCase: true);
-            if (type == null)
+            if (assembly == null)
                 return Array.Empty<SignalColumn>();
-
-            return DiscoverColumns(type);
-        }
-        catch
-        {
-            return Array.Empty<SignalColumn>();
-        }
+            try
+            {
+                var type = assembly.GetType($"{ModelNamespace}.{modelName.Trim()}", throwOnError: false, ignoreCase: true);
+                if (type == null)
+                    return Array.Empty<SignalColumn>();
+                return DiscoverColumns(type);
+            }
+            catch
+            {
+                return Array.Empty<SignalColumn>();
+            }
+        });
     }
 
-    private static Assembly? TryGetSignalAssembly(string? pluginsDir, string? workingDirectory)
+    private static T WithSignalAssembly<T>(string? pluginsDir, string? workingDirectory, Func<Assembly?, T> use)
     {
-        try
-        {
-            var referenced = typeof(PlcStationModel).Assembly;
-            if (HasModelTypes(referenced))
-                return referenced;
-        }
-        catch
-        {
-            /* 未引用插件工程时继续走 LoadFrom */
-        }
-
         var assemblyPath = FindAssemblyPath(pluginsDir);
         if (assemblyPath == null)
-            return null;
+            return use(null);
+
+        var expected = Path.GetFullPath(assemblyPath);
+        var cached = FindLoadedFrom(expected);
+        if (cached != null)
+            return use(cached);
 
         var probeDirs = BuildProbeDirs(pluginsDir, workingDirectory);
-        ResolveEventHandler? handler = null;
-        handler = (_, args) => ResolveAssembly(args.Name, probeDirs);
+        ResolveEventHandler handler = (_, args) => ResolveAssembly(args.Name, probeDirs);
         AppDomain.CurrentDomain.AssemblyResolve += handler;
         try
         {
-            var loaded = Assembly.LoadFrom(assemblyPath);
-            return HasModelTypes(loaded) ? loaded : null;
+            var loaded = Assembly.LoadFrom(expected);
+            return use(HasModelTypes(loaded) ? loaded : null);
         }
         catch
         {
-            return null;
+            return use(null);
         }
         finally
         {
-            if (handler != null)
-                AppDomain.CurrentDomain.AssemblyResolve -= handler;
+            AppDomain.CurrentDomain.AssemblyResolve -= handler;
         }
     }
 
+    private static Assembly? FindLoadedFrom(string expectedFullPath)
+    {
+        try
+        {
+            foreach (var assembly in AppDomain.CurrentDomain.GetAssemblies())
+            {
+                if (!string.Equals(assembly.GetName().Name, "StandardScene.Signal", StringComparison.OrdinalIgnoreCase))
+                    continue;
+                if (string.IsNullOrWhiteSpace(assembly.Location))
+                    continue;
+                if (!string.Equals(Path.GetFullPath(assembly.Location), expectedFullPath, StringComparison.OrdinalIgnoreCase))
+                    continue;
+                return HasModelTypes(assembly) ? assembly : null;
+            }
+        }
+        catch
+        {
+            /* 继续 LoadFrom */
+        }
+
+        return null;
+    }
+
     private static bool HasModelTypes(Assembly assembly)
     {
         return SafeGetTypes(assembly).Any(t =>
@@ -119,7 +134,6 @@ public static class SignalModelSchemaResolver
         Add(workingDirectory);
         if (!string.IsNullOrWhiteSpace(pluginsDir))
             Add(Path.GetDirectoryName(pluginsDir));
-        Add(AppContext.BaseDirectory);
 
         return dirs;
     }