test(mobile): add mobile E2E test suite (53 tests) and fix layout issues

Add comprehensive mobile testing coverage:
- Add chromium-mobile functional test project (iPhone 14, isMobile, hasTouch)
- Add mobile user journey tests (UJ-01/02/04/05/10 mobile variants)
- Add mobile performance baseline tests (FCP/LCP/load time)
- Add mobile accessibility tests (axe-core WCAG 2.1 AA, touch targets,
  form labels, alt text, contrast)
- Update README with progress and new npm scripts

Fix pre-existing issues:
- Fix footer component layout and test assertions
- Fix admin content page sidebar navigation and breadcrumb
- Fix standalone products page metadata and layout
- Fix product detail/service value sections
- Fix contact form layout on mobile
- Fix navigation constants and products data
- Fix layout.tsx CMS config and theme handling
- Fix erp-upgrade content layout

src/lib/constants/navigation.ts

@@ -71,11 +71,9 @@ export const MEGA_DROPDOWN_DATA: MegaDropdownData = {
     {
       id: 'standalone-products',
       title: '专业产品',
-      description: '即将推出',
+      description: '专业领域独立产品线',
       items: [
-        { id: 'security', title: '安全产品', description: '企业安全防护方案', href: '#', badge: '敬请期待' },
-        { id: 'specialized-software', title: '特种行业软件', description: '垂直行业专业解决方案', href: '#', badge: '敬请期待' },
-        { id: 'hardware', title: '硬件产品', description: '智能硬件与IoT设备', href: '#', badge: '敬请期待' },
+        { id: 'novavis', title: '睿视 NovaVis', description: '面向执法机关的离线智能数据分析与资金关系图谱平台', href: 'https://novavis.p.novalon.cn', badge: '内测中' },
       ],
     },
   ],

src/lib/constants/products.ts

@@ -70,6 +70,7 @@ export interface Product {
   specs: string[];
   tags: string[];
   heroThemeId: string;
+  externalUrl?: string;
   caseStudies: CaseStudy[];
   dataProofs: DataProof[];
   certifications: Certification[];