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/app/layout.tsx

@@ -2,8 +2,12 @@ import type { Metadata, Viewport } from "next";
 import { Geist, Geist_Mono, Noto_Sans_SC, Ma_Shan_Zheng, Long_Cang } from "next/font/google";
 import localFont from "next/font/local";
 import "./globals.css";
+import { Suspense } from "react";
 import { ThemeProvider } from "@/contexts/theme-context";
 import { GoogleAnalytics } from "@/components/analytics/GoogleAnalytics";
+import { CookieConsent } from "@/components/analytics/CookieConsent";
+import { PerformanceTracker } from "@/components/analytics/PerformanceTracker";
+import { OutboundLinkTracker } from "@/components/analytics/OutboundLinkTracker";
 import { OrganizationSchema, WebsiteSchema } from "@/components/seo/structured-data";
 import { MobileTabBar } from "@/components/layout/mobile-tab-bar";
 import { ErrorBoundary } from "@/components/ui/error-boundary";
@@ -56,6 +60,7 @@ const aoyagiReisho = localFont({
 });
 
 export const metadata: Metadata = {
+  metadataBase: new URL("https://www.novalon.cn"),
   title: {
     default: "四川睿新致远科技有限公司 - 企业数字化转型服务商",
     template: "%s | 四川睿新致远科技有限公司",
@@ -141,14 +146,25 @@ export default function RootLayout({
         className={`${geistSans.variable} ${geistMono.variable} ${notoSansSC.variable} ${maShanZheng.variable} ${longCang.variable} ${aoyagiReisho.variable} font-sans antialiased`}
         style={{ fontFamily: "'Noto Sans SC', 'Geist', -apple-system, BlinkMacSystemFont, sans-serif" }}
       >
+        <a
+          href="#main-content"
+          className="sr-only focus:not-sr-only focus:absolute focus:top-4 focus:left-4 focus:z-[9999] focus:px-4 focus:py-2 focus:bg-[#C41E3A] focus:text-white focus:rounded-md focus:outline-none focus:ring-2 focus:ring-white focus:ring-offset-2 focus:ring-offset-[#C41E3A]"
+        >
+          跳转到主内容
+        </a>
         <ScrollProgress />
         <GoogleAnalytics />
+        <PerformanceTracker />
+        <OutboundLinkTracker />
         <ThemeProvider>
           <ErrorBoundary>
             {children}
           </ErrorBoundary>
         </ThemeProvider>
-        <MobileTabBar />
+        <Suspense fallback={null}>
+          <MobileTabBar />
+        </Suspense>
+        <CookieConsent />
         <BackToTop />
       </body>
     </html>