refactor: change loadModel parameter from string to string array

- Update loadModel signature: url: string -> urls: string[]
- Update validation logic for array parameter
- Update all demo files to pass array instead of single string

src/components/engine/index.ts

@@ -7,8 +7,8 @@ import type { MeasureUnit, MeasurePrecision } from '../measure-panel/types';
 import type { SectionBoxRange } from '../section-box-panel/types';
 import { ManagerRegistry } from '../../core/manager-registry';
 // 导入第三方 SDK 的 createEngine 函数（从 npm 包引入）
-// import { createEngine as createEngineSDK } from 'iflow-engine-base';
-import { createEngine as createEngineSDK } from '../../../../bim_engine_base/dist/bim-engine-sdk.es';
+import { createEngine as createEngineSDK } from 'iflow-engine-base';
+//import { createEngine as createEngineSDK } from '../../../../bim_engine_base/dist/bim-engine-sdk.es';
 import "../../../../bim_engine_base/dist/iflow-engine-base.css"
 
 export type { EngineOptions, ModelLoadOptions, EngineInfo };
@@ -175,19 +175,19 @@ export class Engine implements IBimComponent {
 
     /**
      * 加载 3D 模型
-     * @param url 模型文件 URL
+     * @param urls 模型文件 URL 数组
      * @param options 加载选项（位置、旋转、缩放）
      */
-    public loadModel(url: string, options?: ModelLoadOptions): void {
+    public loadModel(urls: string[], options?: ModelLoadOptions): void {
         if (!this._isInitialized || !this.engine) {
             console.error('[Engine] Engine not initialized. Please call init() first.');
             return;
         }
-        if (!url) {
-            console.error('[Engine] Model URL is required.');
+        if (!urls || urls.length === 0) {
+            console.error('[Engine] Model URLs are required.');
             return;
         }
-        this.engine.loaderModule.loadModels([url], options);
+        this.engine.loaderModule.loadModels(urls, options);
     }
 
     /**

src/managers/engine-manager.ts

@@ -234,15 +234,15 @@ export class EngineManager extends BaseManager {
 
     /**
      * 加载模型
-     * @param url 模型 URL
+     * @param urls 模型 URL 数组
      * @param options 加载选项
      */
-    public loadModel(url: string, options?: ModelLoadOptions): void {
+    public loadModel(urls: string[], options?: ModelLoadOptions): void {
         if (!this.engineInstance) {
             console.warn('[EngineManager] 3D Engine not initialized.');
             return;
         }
-        this.engineInstance.loadModel(url, options);
+        this.engineInstance.loadModel(urls, options);
     }
 
     /**