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/layout/header.tsx

@@ -1,9 +1,9 @@
 'use client';
 
 import { Suspense, useState, useEffect, useCallback, useRef } from 'react';
-import Link from 'next/link';
+import { StaticLink } from '@/components/ui/static-link';
 import Image from 'next/image';
-import { usePathname, useSearchParams, useRouter } from 'next/navigation';
+import { usePathname, useSearchParams } from 'next/navigation';
 import { Menu, X } from 'lucide-react';
 import { AnimatePresence, motion } from 'framer-motion';
 import { Button } from '@/components/ui/button';
@@ -15,13 +15,12 @@ function HeaderContent() {
   const [isScrolled, setIsScrolled] = useState(false);
   const pathname = usePathname();
   const searchParams = useSearchParams();
-  const router = useRouter();
   const focusTrapRef = useFocusTrap<HTMLDivElement>(isOpen);
   const isScrollingRef = useRef(false);
   const scrollTimeoutRef = useRef<NodeJS.Timeout | null>(null);
 
   const getActiveSection = useCallback(() => {
-    if (pathname === '/contact') return 'contact';
+    if (pathname === '/contact') {return 'contact';}
     if (pathname === '/') {
       const section = searchParams.get('section');
       return section || 'home';
@@ -90,7 +89,7 @@ function HeaderContent() {
     e.preventDefault();
     
     if (item.id === 'contact') {
-      router.push('/contact');
+      window.location.href = '/contact';
     } else if (item.id === 'home') {
       if (pathname === '/') {
         isScrollingRef.current = true;
@@ -101,7 +100,7 @@ function HeaderContent() {
           isScrollingRef.current = false;
         }, 1000);
       } else {
-        router.push('/');
+        window.location.href = '/';
       }
     } else {
       if (pathname === '/') {
@@ -121,12 +120,12 @@ function HeaderContent() {
         };
         scrollToSection();
       } else {
-        router.push(`/?section=${item.id}`);
+        window.location.href = `/?section=${item.id}`;
       }
     }
     
     setIsOpen(false);
-  }, [pathname, router]);
+  }, [pathname]);
 
   const isActive = useCallback((item: NavigationItem) => {
     if (item.id === 'contact') {
@@ -156,7 +155,7 @@ function HeaderContent() {
       >
         <div className="container-wide">
           <div className="flex items-center justify-between h-16">
-            <Link 
+            <StaticLink 
               href="/"
               className="flex items-center group"
             >
@@ -168,11 +167,11 @@ function HeaderContent() {
                 className="h-8 w-auto transition-transform duration-200 group-hover:scale-105"
                 priority
               />
-            </Link>
+            </StaticLink>
 
             <nav className="hidden md:flex items-center gap-1" role="navigation" aria-label="主导航" data-testid="desktop-navigation">
               {navigationItems.map((item) => (
-                <Link
+                <StaticLink
                   key={item.id}
                   href={item.href}
                   onClick={(e) => handleNavClick(e, item)}
@@ -197,7 +196,7 @@ function HeaderContent() {
                       }
                     `}
                   />
-                </Link>
+                </StaticLink>
               ))}
             </nav>
 
@@ -206,7 +205,7 @@ function HeaderContent() {
                 size="sm"
                 asChild
               >
-                <Link href="/contact" data-testid="consult-button">立即咨询</Link>
+                <StaticLink href="/contact" data-testid="consult-button">立即咨询</StaticLink>
               </Button>
             </div>
 
@@ -260,7 +259,7 @@ function HeaderContent() {
                     animate={{ x: 0, opacity: 1 }}
                     transition={{ delay: index * 0.05 }}
                   >
-                    <Link
+                    <StaticLink
                       href={item.href}
                       onClick={(e) => handleNavClick(e, item)}
                       className={`
@@ -274,7 +273,7 @@ function HeaderContent() {
                       style={{ minHeight: '48px', display: 'flex', alignItems: 'center' }}
                     >
                       {item.label}
-                    </Link>
+                    </StaticLink>
                   </motion.div>
                 ))}
                 <div className="mt-6 px-4 pt-6 border-t border-[#E2E8F0]">
@@ -283,9 +282,9 @@ function HeaderContent() {
                     asChild
                     size="lg"
                   >
-                    <Link href="/contact" onClick={() => setIsOpen(false)}>
+                    <StaticLink href="/contact" onClick={() => setIsOpen(false)}>
                       联系我们
-                    </Link>
+                    </StaticLink>
                   </Button>
                 </div>
               </nav>