refactor(web-platform): release V0.6 精简代码

web_platform/src/components/ui/VirtualTreeViewport.test.tsx

@@ -0,0 +1,3 @@
+import {fireEvent,render,screen} from '@testing-library/react';
+import {VirtualTreeViewport} from './VirtualTreeViewport';
+describe('VirtualTreeViewport',()=>{it('只渲染可视窗口并在滚动后更新行',()=>{const items=Array.from({length:1000},(_,id)=>({id,label:`节点 ${id}`}));render(<VirtualTreeViewport label="大型树" items={items} height={100} rowHeight={20} overscan={1} getKey={item=>item.id} renderRow={item=><div>{item.label}</div>}/>);const tree=screen.getByRole('tree',{name:'大型树'});expect(screen.getByText('节点 0')).toBeVisible();expect(screen.queryByText('节点 500')).not.toBeInTheDocument();Object.defineProperty(tree,'scrollTop',{configurable:true,value:10000});fireEvent.scroll(tree);expect(screen.getByText('节点 500')).toBeVisible();fireEvent.keyDown(tree,{key:'ArrowDown'});expect(tree.getAttribute('aria-activedescendant')).toContain('501');});});