Google Analytics script execution should be deferred

Currently GA script executes asynchronously while page is loading without a good reason for doing so since there are no custom GA events being tracked when page load is happening or right after it finishes, it's also showing up in Lighthouse score report as a very small main-thread blocker. Performance-wise it would be better to defer the script execution until the page has finished loading

首先定位页面加载期间使用的 Google Analytics 集成。确认其当前的异步行为，然后验证脚本是否延迟到页面加载完成后执行，并确认 Lighthouse 不再将其报告为主线程阻塞因素。