refactor: slim down EngineManager from 861 to 290 lines by removing passthrough proxy pattern

- EngineManager now only exposes public SDK API (initialize, loadModel, pause/resumeRendering, getEngineComponent, destroy)
- Internal managers access Engine component directly via this.engineComponent getter on BaseManager
- Non-manager components use registry.engine3d.getEngineComponent() for direct Engine access
- Replaced getEngine() with onRawEvent()/offRawEvent() for raw engine event access
- Migrated 62 call sites across 13 files (9 managers, 1 panel, 3 toolbar buttons)
- Updated all architecture docs, API docs, and README to reflect new patterns

README.md

@@ -70,16 +70,18 @@ onMounted(() => {
     bimEngine.initWalkControl();       // 漫游控制
     bimEngine.initMap();               // 地图
 
-    // 加载模型
-    bimEngine.engine?.loadModel({
-      url: '/path/to/your/model.ifc',
-      onProgress: (progress) => {
-        console.log(`加载进度: ${progress}%`);
-      },
-      onComplete: () => {
-        console.log('模型加载完成');
+    // 加载模型（EngineManager 对外公共 API）
+    bimEngine.engine?.loadModel(
+      ['/path/to/your/model.ifc'],
+      {
+        onProgress: (progress) => {
+          console.log(`加载进度: ${progress}%`);
+        },
+        onComplete: () => {
+          console.log('模型加载完成');
+        }
       }
-    });
+    );
   }
 });
 
@@ -179,6 +181,13 @@ BIM Engine SDK 采用 **管理器模式 (Manager Pattern)** 作为核心架构,
 - ✅ 简化集成复杂度
 - ✅ 支持按需加载
 
+> 架构更新（2026-03）
+>
+> - `EngineManager` 已从全量透传层收敛为“外部公共 API + 生命周期编排”
+> - 内部 Manager 统一通过 `BaseManager.engineComponent` 直接访问 `Engine` 组件
+> - 非 Manager 场景通过 `registry.engine3d?.getEngineComponent()?.xxx()` 访问引擎能力
+> - `Engine.getEngine()` 已移除，事件订阅使用 `onRawEvent()/offRawEvent()`
+
 ### 架构分层
 
 ```
@@ -193,7 +202,7 @@ BIM Engine SDK 采用 **管理器模式 (Manager Pattern)** 作为核心架构,
 │          Manager 层 (管理器)             │
 │  - ToolbarManager (工具栏)               │
 │  - DialogManager (对话框)                │
-│  - EngineManager (3D引擎)                │
+│  - EngineManager (外部公共API/生命周期)    │
 │  - MeasureDialogManager (测量)           │
 │  - SectionPlaneDialogManager (剖切)      │
 │  - WalkControlManager (漫游)             │
@@ -333,12 +342,14 @@ class BimEngine {
 每个管理器负责特定功能的生命周期管理:
 
 ```typescript
-// 3D 引擎管理器
-bimEngine.engine?.loadModel({
-  url: '/path/to/model.ifc',
-  onProgress: (progress) => console.log(progress),
-  onComplete: () => console.log('完成')
-});
+// 3D 引擎管理器（对外公共 API）
+bimEngine.engine?.loadModel(
+  ['/path/to/model.ifc'],
+  {
+    onProgress: (progress) => console.log(progress),
+    onComplete: () => console.log('完成')
+  }
+);
 
 // 测量工具管理器
 bimEngine.measure?.show();
@@ -509,6 +520,15 @@ npm run dev
 
 ## 📝 更新日志
 
+### v1.3.2 (2026-03-05)
+
+**架构优化**
+- ✨ EngineManager 瘦身：移除大规模 1:1 透传方法
+- ✨ 新增 `EngineManager.getEngineComponent()` 供内部访问
+- ✨ BaseManager 新增 `engineComponent` 便捷访问器
+- ✨ Manager 内部调用统一迁移为 `this.engineComponent?.xxx()`
+- ✨ 原始事件访问改为 `onRawEvent()/offRawEvent()`，移除 `getEngine()`
+
 ### v1.0.0 (2024-12-26)
 
 **核心功能**