feat(analytics): enhance Google Analytics with privacy compliance and comprehensive tracking

- Add automatic route change tracking for SPA navigation
- Implement Cookie consent banner for GDPR compliance
- Add performance tracking (LCP, FID, CLS Web Vitals)
- Add outbound link click tracking
- Integrate contact form submission tracking with conversion events
- Add CTA button click tracking in hero section
- Integrate error tracking in ErrorBoundary component
- Extend analytics utility library with 15+ tracking functions
- Configure IP anonymization and privacy settings
- Remove unused test files and deployment scripts
- Update case studies to include only specified cases
- Fix mobile navigation active state issues
- Fix lint errors in test files and components

BREAKING CHANGE: Google Analytics now requires user consent before tracking

src/components/layout/header.tsx

@@ -10,6 +10,12 @@ import { Button } from '@/components/ui/button';
 import { COMPANY_INFO, NAVIGATION, type NavigationItem } from '@/lib/constants';
 import { useFocusTrap } from '@/hooks/use-focus-trap';
 
+declare global {
+  interface Window {
+    __isProgrammaticScroll?: boolean;
+  }
+}
+
 function HeaderContent() {
   const [isOpen, setIsOpen] = useState(false);
   const [isScrolled, setIsScrolled] = useState(false);
@@ -34,9 +40,9 @@ function HeaderContent() {
     const handleScroll = () => {
       setIsScrolled(window.scrollY > 20);
       
-      if (pathname === '/' && !isScrollingRef.current) {
+      if (pathname === '/' && !isScrollingRef.current && !window.__isProgrammaticScroll) {
         const scrollPosition = window.scrollY + 100;
-        const sections = ['home', 'services', 'solutions', 'products', 'cases', 'about', 'news'];
+        const sections = ['home', 'services', 'solutions', 'products', 'cases', 'about', 'team', 'news'];
         
         for (const sectionId of sections) {
           const element = document.getElementById(sectionId);
@@ -158,6 +164,7 @@ function HeaderContent() {
             <StaticLink 
               href="/"
               className="flex items-center group"
+              aria-label="返回首页"
             >
               <Image 
                 src="/logo.svg" 
@@ -165,6 +172,7 @@ function HeaderContent() {
                 width={32}
                 height={32}
                 className="h-8 w-auto transition-transform duration-200 group-hover:scale-105"
+                loading="eager"
                 priority
               />
             </StaticLink>