feat: 重构测试框架并优化代码结构

refactor(tests): 将e2e_tests迁移到tests_suite和api_integration_tests
style: 为Java类添加文档注释
docs: 更新.gitignore和配置文件
test: 添加性能测试和Playwright测试脚本
chore: 清理旧测试文件和配置

tests_suite/playwright.config.ts

@@ -0,0 +1,22 @@
+import { defineConfig, devices } from '@playwright/test';
+
+export default defineConfig({
+  testDir: './e2e',
+  fullyParallel: true,
+  forbidOnly: !!process.env.CI,
+  retries: process.env.CI ? 2 : 0,
+  workers: process.env.CI ? 1 : undefined,
+  reporter: 'list',
+  use: {
+    baseURL: 'http://localhost:3003',
+    trace: 'on-first-retry',
+    headless: true,
+  },
+
+  projects: [
+    {
+      name: 'chromium',
+      use: { ...devices['Desktop Chrome'] },
+    },
+  ],
+});