feat(tree): implement tree component with checkbox support and manager pattern

- Added core Tree component (BimTree, BimTreeNode)
- Added TreeManager for lifecycle management
- Added ModelTreeManager for business logic encapsulation (Tree + Dialog)
- Integrated into BimEngine and updated demos
- Added internationalization support

src/managers/model-tree-manager.ts

@@ -0,0 +1,76 @@
+import { BimComponent } from '../core/component';
+import { BimTree } from '../components/tree/index';
+import { BimDialog } from '../components/dialog/index';
+import { TreeNodeConfig } from '../components/tree/types';
+
+/**
+ * 模型树业务管理器
+ * 负责组装 Tree 和 Dialog 组件，提供开箱即用的业务弹窗
+ */
+export class ModelTreeManager extends BimComponent {
+
+    /**
+     * 显示带复选框的模型结构树弹窗
+     * @param data 树节点数据
+     * @param title 弹窗标题 (翻译键)
+     */
+    public showStructTree(data: TreeNodeConfig[], title: string = 'tree.modelStruct'): { tree: BimTree, dialog: BimDialog } {
+        // 1. 创建 Tree 实例
+        const tree = this.engine.tree!.create({
+            data: data,
+            checkable: true,
+            checkStrictly: true,
+            defaultExpandAll: true
+        });
+
+        // 2. 创建 Dialog 实例
+        const dialog = this.engine.dialog!.create({
+            title: title,
+            width: 300,
+            height: 400,
+            content: tree.element,
+            position: 'left-center',
+            resizable: true,
+            // 关键：绑定生命周期
+            onClose: () => {
+                tree.destroy();
+            }
+        });
+
+        return { tree, dialog };
+    }
+
+    /**
+     * 显示简单的树形弹窗 (无复选框)
+     * @param data 树节点数据
+     * @param title 弹窗标题 (翻译键)
+     */
+    public showSimpleTree(data: TreeNodeConfig[], title: string = 'menu.home'): { tree: BimTree, dialog: BimDialog } {
+        // 1. 创建 Tree 实例
+        const tree = this.engine.tree!.create({
+            data: data,
+            checkable: false,
+            defaultExpandAll: true
+        });
+
+        // 2. 创建 Dialog 实例
+        const dialog = this.engine.dialog!.create({
+            title: title,
+            width: 250,
+            height: 300,
+            content: tree.element,
+            position: 'center',
+            resizable: true,
+            onClose: () => {
+                tree.destroy();
+            }
+        });
+
+        return { tree, dialog };
+    }
+
+    public destroy(): void {
+        // 具体的 Tree 和 Dialog 实例由它们各自的生命周期管理
+        // 这里不需要销毁它们，除非我们持有了全局引用
+    }
+}

src/managers/tree-manager.ts

@@ -0,0 +1,57 @@
+import { BimComponent } from '../core/component';
+import { BimTree } from '../components/tree/index';
+import { TreeOptions } from '../components/tree/types';
+import type { BimEngine } from '../bim-engine';
+
+/**
+ * 树组件管理器
+ * 负责创建和管理 BimTree 实例
+ */
+export class TreeManager extends BimComponent {
+    
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
+    constructor(engine: BimEngine, _container: HTMLElement) {
+        super(engine);
+    }
+    
+    /**
+     * 创建一个新的树组件实例
+     * @param options 配置选项
+     */
+    public create(options: TreeOptions): BimTree {
+        const tree = new BimTree(options);
+        
+        // 绑定事件桥接
+        tree.onNodeCheck = (node) => {
+            this.emit('ui:tree-node-check', { 
+                id: node.config.id, 
+                checked: node.config.checked || false, 
+                node: node.config 
+            });
+        };
+        
+        tree.onNodeSelect = (node) => {
+            this.emit('ui:tree-node-select', { 
+                id: node.config.id, 
+                selected: true, 
+                node: node.config 
+            });
+        };
+        
+        tree.onNodeExpand = (node) => {
+            this.emit('ui:tree-node-expand', { 
+                id: node.config.id, 
+                expanded: node.config.expanded || false
+            });
+        };
+        
+        tree.init();
+        return tree;
+    }
+
+    public destroy(): void {
+        // TreeManager 本身不持有 Tree 实例的强引用列表
+        // 实例通常由调用者（如 Dialog）持有并销毁
+        // 这里可以做一些全局清理工作
+    }
+}