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

e2e/playwright.config.ts

@@ -46,6 +46,15 @@ export default defineConfig({
       name: 'chromium',
       use: { ...devices['Desktop Chrome'] },
     },
+    {
+      name: 'chromium-coverage',
+      use: { 
+        ...devices['Desktop Chrome'],
+        browserName: 'chromium',
+      },
+      testMatch: /.*\.spec\.ts/,
+      globalSetup: undefined,
+    },
     {
       name: 'firefox',
       use: { ...devices['Desktop Firefox'] },