refactor: 完成静态网站转换，移除所有 CMS 和动态功能

- 删除数据库相关代码 (src/db/)
- 删除 API 路由 (src/app/api/)
- 删除认证相关代码 (src/lib/auth/, src/providers/)
- 删除监控和安全中间件 (src/lib/security/, src/lib/monitoring/)
- 删除 hooks (use-news, use-products, use-services)
- 更新组件为静态数据源
- 添加 nginx 静态配置和部署脚本
- 添加 static-link 组件

src/components/analytics/GoogleAnalytics.tsx

@@ -1,16 +1,10 @@
 'use client';
 
 import Script from 'next/script';
-import { useEffect } from 'react';
-import { GA_MEASUREMENT_ID } from '@/lib/analytics';
+
+const GA_MEASUREMENT_ID = process.env.NEXT_PUBLIC_GA_MEASUREMENT_ID || '';
 
 export function GoogleAnalytics() {
-  useEffect(() => {
-    if (GA_MEASUREMENT_ID) {
-      console.log('Google Analytics initialized:', GA_MEASUREMENT_ID);
-    }
-  }, []);
-
   if (!GA_MEASUREMENT_ID) {
     return null;
   }
@@ -25,10 +19,8 @@ export function GoogleAnalytics() {
         {`
           window.dataLayer = window.dataLayer || [];
           function gtag(){dataLayer.push(arguments);}
-          window.gtag = gtag;
           gtag('js', new Date());
           gtag('config', '${GA_MEASUREMENT_ID}', {
-            page_path: window.location.pathname,
             send_page_view: false
           });
         `}