feat: update

dist/cjs/board/Whiteboard/index.js

                     parentContainer: _this.pagesContainer
                 });
                 page.id = pageIds[i];
-                page.container.style.opacity = 'hidden';
+                page.container.style.visibility = 'hidden';
                 _this.pages.push(page);
                 page.open();
             });

dist/index.js

                     parentContainer: _this.pagesContainer
                 });
                 page.id = pageIds[i];
-                page.container.style.opacity = 'hidden';
+                page.container.style.visibility = 'hidden';
                 _this.pages.push(page);
                 page.open();
             });

src/board/Whiteboard/index.ts

         page.id = pageIds[i];
 
         // 这里隐藏 Dashboard 的图片源，Siema 切换的是占位图片
-        page.container.style.opacity = 'hidden';
+        page.container.style.visibility = 'hidden';
 
         this.pages.push(page);