fix(types): 修复 16 个 TypeScript 类型检查错误

- 修复 animations.test.tsx 中的 Variant 类型访问问题
- 清理 9 个测试文件中的未使用导入
- 使用可选链操作符处理可能为 undefined 的属性访问
- 修复 mock 组件缺少 displayName 的 ESLint 错误

src/components/ui/error-boundary.test.tsx

@@ -1,5 +1,5 @@
 import { describe, it, expect, beforeEach, jest } from '@jest/globals';
-import { render, screen, fireEvent } from '@testing-library/react';
+import { render, screen } from '@testing-library/react';
 import '@testing-library/jest-dom';
 import { ErrorBoundary } from './error-boundary';
 

src/components/ui/input.test.tsx

@@ -1,6 +1,6 @@
 import * as React from 'react';
 import { describe, it, expect, jest, beforeEach } from '@jest/globals';
-import { render, screen, fireEvent } from '@testing-library/react';
+import { render, screen } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
 import '@testing-library/jest-dom';
 import { Input } from './input';

src/components/ui/loading-skeleton.test.tsx

@@ -1,5 +1,5 @@
 import { describe, it, expect } from '@jest/globals';
-import { render, screen } from '@testing-library/react';
+import { render } from '@testing-library/react';
 import '@testing-library/jest-dom';
 import {
   Skeleton,

src/components/ui/ripple-button.test.tsx

@@ -34,8 +34,6 @@ jest.mock('framer-motion', () => ({
   AnimatePresence: ({ children }: { children: React.ReactNode }) => <>{children}</>,
 }));
 
-const { RippleButton } = jest.requireActual('./ripple-button');
-
 describe('RippleButton', () => {
   beforeEach(() => {
     jest.clearAllMocks();

src/components/ui/sheet.test.tsx

@@ -9,7 +9,6 @@ import {
   SheetFooter,
   SheetTitle,
   SheetDescription,
-  SheetClose,
 } from './sheet';
 
 describe('Sheet', () => {

src/components/ui/textarea.test.tsx

@@ -1,6 +1,6 @@
 import * as React from 'react';
 import { describe, it, expect, jest, beforeEach } from '@jest/globals';
-import { render, screen, fireEvent } from '@testing-library/react';
+import { render, screen } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
 import '@testing-library/jest-dom';
 import { Textarea } from './textarea';