feat(editor): EnemyAiBrain 检视器——二选一不变量提前到编辑期，定义 id 改下拉

Assets/_Game/Scripts/Editor/AI/EnemyAiBrainEditor.cs

@@ -0,0 +1,96 @@
+using System.Collections.Generic;
+using System.Linq;
+using UnityEditor;
+using UnityEngine;
+using BaseGames.AI;
+using BaseGames.Enemies;
+
+namespace BaseGames.Editor.AI
+{
+    /// <summary>
+    /// EnemyAiBrain 的检视器：把「配方资产 / AiScript 定义 id」二选一的不变量提前到编辑期，
+    /// 并把定义 id 从裸字符串换成下拉（取自 AiDefinitionRegistry）。
+    /// 不做任何自动修正——配错就明确报出来，由作者选一条路（CLAUDE.md 第 6 条）。
+    /// </summary>
+    [CustomEditor(typeof(EnemyAiBrain))]
+    [CanEditMultipleObjects]
+    public sealed class EnemyAiBrainEditor : UnityEditor.Editor
+    {
+        const string NoneLabel = "(不用此路径)";
+
+        SerializedProperty _recipe;
+        SerializedProperty _definitionId;
+
+        void OnEnable()
+        {
+            _recipe       = serializedObject.FindProperty("_recipe");
+            _definitionId = serializedObject.FindProperty("_definitionId");
+        }
+
+        public override void OnInspectorGUI()
+        {
+            serializedObject.Update();
+
+            EditorGUILayout.PropertyField(_recipe);
+            DrawDefinitionIdDropdown();
+
+            DrawInvariantHelp();
+
+            // 其余字段（若将来新增）照常绘制
+            DrawPropertiesExcluding(serializedObject, "m_Script", "_recipe", "_definitionId");
+
+            serializedObject.ApplyModifiedProperties();
+        }
+
+        void DrawDefinitionIdDropdown()
+        {
+            var ids = new List<string> { NoneLabel };
+            ids.AddRange(AiDefinitionRegistry.Ids.OrderBy(x => x));
+
+            string current = _definitionId.stringValue;
+            int index = string.IsNullOrEmpty(current) ? 0 : ids.IndexOf(current);
+
+            // 已配的 id 在注册表里找不到（脚本被删/改名）——保留原值并显式标出，不静默清空
+            bool missing = index < 0;
+            if (missing)
+            {
+                ids.Add($"{current}  ⚠ 注册表中不存在");
+                index = ids.Count - 1;
+            }
+
+            using (new EditorGUI.DisabledScope(_recipe.objectReferenceValue != null))
+            {
+                int picked = EditorGUILayout.Popup(
+                    new GUIContent("定制脚本 id", "[AiDefinition(id)] 的 AiScript 子类 id。与配方资产二选一"),
+                    index, ids.Select(s => new GUIContent(s)).ToArray());
+
+                if (picked != index)
+                    _definitionId.stringValue = picked == 0 ? string.Empty : ids[picked];
+            }
+
+            if (missing)
+                EditorGUILayout.HelpBox(
+                    $"定义 id '{current}' 在 AiDefinitionRegistry 中不存在。" +
+                    "对应的 [AiDefinition] AiScript 子类可能已被删除或改名。", MessageType.Error);
+        }
+
+        void DrawInvariantHelp()
+        {
+            if (_recipe.hasMultipleDifferentValues || _definitionId.hasMultipleDifferentValues)
+                return;   // 多选且不一致时不下断言
+
+            bool hasRecipe = _recipe.objectReferenceValue != null;
+            bool hasId     = !string.IsNullOrEmpty(_definitionId.stringValue);
+
+            if (hasRecipe && hasId)
+                EditorGUILayout.HelpBox(
+                    "配方资产与定制脚本 id 同时配置了。二者互斥，运行时 Awake 会报错并禁用本组件。" +
+                    "请清掉其中一项。", MessageType.Error);
+            else if (!hasRecipe && !hasId)
+                EditorGUILayout.HelpBox(
+                    "尚未配置 AI 来源。约 95% 的敌人应指定配方资产（用菜单 " +
+                    "BaseGames/AI/Enemy AI Recipe Wizard 创建）；有独门机制的敌人才写 " +
+                    "[AiDefinition] 的 AiScript 子类并在此选它的 id。", MessageType.Error);
+        }
+    }
+}

Assets/_Game/Scripts/Editor/AI/EnemyAiBrainEditor.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 1916dc03357f54d48a974ff1bbd377ba
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: