feat: 增加测试覆盖率并优化代码质量

test: 添加单元测试和端到端测试
refactor: 重构登录页面和上传模块
ci: 更新测试覆盖率阈值至42%
build: 添加测试相关依赖
docs: 更新测试文档
style: 修复代码格式问题

src/components/analytics/analytics.test.tsx

@@ -0,0 +1,21 @@
+import '@testing-library/jest-dom';
+
+jest.mock('./GoogleAnalytics', () => ({
+  GoogleAnalytics: () => null,
+}));
+
+jest.mock('./web-vitals', () => ({
+  WebVitals: () => null,
+}));
+
+describe('Analytics Components', () => {
+  it('should export GoogleAnalytics', () => {
+    const { GoogleAnalytics } = require('./GoogleAnalytics');
+    expect(GoogleAnalytics).toBeDefined();
+  });
+
+  it('should export WebVitals', () => {
+    const { WebVitals } = require('./web-vitals');
+    expect(WebVitals).toBeDefined();
+  });
+});