fix(canvas): clipboard init error

Author: liujuping

packages/designer/src/designer/clipboard.ts

@@ -69,7 +69,13 @@ class Clipboard implements IClipboard {
     }
     const copyPaster = document.createElement<'textarea'>('textarea');
     copyPaster.style.cssText = 'position: absolute;left: -9999px;top:-100px';
-    document.body.appendChild(copyPaster);
+    if (document.body) {
+      document.body.appendChild(copyPaster);
+    } else {
+      document.addEventListener('DOMContentLoaded', () => {
+        document.body.appendChild(copyPaster);
+      });
+    }
     const dispose = this.initCopyPaster(copyPaster);
     return () => {
       dispose();

packages/types/src/shell/api/material.ts

@@ -15,7 +15,7 @@ export interface IPublicApiMaterial {
    * set data for Assets
    * @returns void
    */
-  setAssets(assets: IPublicTypeAssetsJson): void;
+  setAssets(assets: IPublicTypeAssetsJson): Promise<void>;
 
   /**
    * 获取「资产包」结构