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/app/(marketing)/page.tsx

@@ -1,37 +1,11 @@
 import { Suspense } from 'react';
-import { db } from '@/db';
-import { siteConfig } from '@/db/schema';
 import { HomeContent } from './home-content';
 import { SectionSkeleton } from '@/components/ui/loading-skeleton';
 
-interface SiteConfig {
-  feature_services?: { enabled: boolean; items: string[] };
-  feature_products?: { enabled: boolean; showPricing: boolean; featuredProducts: string[] };
-  feature_news?: { enabled: boolean; displayCount: number; categories: string[]; sortOrder: 'asc' | 'desc' };
-}
-
-async function getSiteConfig(): Promise<SiteConfig> {
-  try {
-    const allConfigs = await db.select().from(siteConfig);
-    
-    const configMap = allConfigs.reduce((acc, config) => {
-      acc[config.key] = config.value;
-      return acc;
-    }, {} as Record<string, any>);
-    
-    return configMap as SiteConfig;
-  } catch (error) {
-    console.error('获取配置失败:', error);
-    return {};
-  }
-}
-
-export default async function HomePage() {
-  const config = await getSiteConfig();
-  
+export default function HomePage() {
   return (
     <Suspense fallback={<SectionSkeleton />}>
-      <HomeContent config={config} />
+      <HomeContent />
     </Suspense>
   );
 }