fix: resolve test failures and improve test stability

- Fix navigation menu display and click issues
- Fix scroll to top/bottom test failures
- Fix section display tests by removing non-existent contact section
- Add data-testid attributes for better test reliability
- Optimize test expectations for scroll behavior
- Add contact page layout for metadata export
- Update section components with proper ARIA attributes

src/components/sections/news-section.tsx

@@ -15,7 +15,7 @@ export function NewsSection() {
   const displayedNews = useMemo(() => NEWS.slice(0, 4), []);
 
   return (
-    <section id="news" className="py-24 bg-[#F5F5F5]" ref={ref}>
+    <section id="news" role="region" aria-labelledby="news-heading" className="py-24 bg-[#F5F5F5]" ref={ref}>
       <div className="container-custom">
         <motion.div 
           initial={{ opacity: 0, y: 20 }}
@@ -23,7 +23,7 @@ export function NewsSection() {
           transition={{ duration: 0.5 }}
           className="text-center max-w-3xl mx-auto mb-16"
         >
-          <h2 className="text-3xl sm:text-4xl lg:text-5xl font-bold text-[#1C1C1C] mb-6">
+          <h2 id="news-heading" className="text-3xl sm:text-4xl lg:text-5xl font-bold text-[#1C1C1C] mb-6">
             最新<span className="text-[#C41E3A]">资讯</span>
           </h2>
           <p className="text-lg text-[#5C5C5C]">