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/app/layout.tsx

@@ -14,7 +14,7 @@ import { ScrollProgress } from "@/components/ui/scroll-progress";
 import { BackToTop } from "@/components/ui/back-to-top";
 import { ClientLayout } from "@/components/layout/client-layout";
 import { getPublishedItems } from "@/lib/cms/data-server";
-import { SiteConfigProvider, type SiteConfig, type NavigationItem, type MegaDropdownGroup } from "@/lib/site-config";
+import { SiteConfigProvider, type SiteConfig, type NavigationItem, type MegaDropdownGroup, type MegaDropdownItem } from "@/lib/site-config";
 import { COMPANY_INFO } from "@/lib/constants/company";
 import { NAVIGATION_V2, MEGA_DROPDOWN_DATA } from "@/lib/constants/navigation";
 
@@ -82,15 +82,45 @@ export default async function RootLayout({
 }: Readonly<{
   children: React.ReactNode;
 }>) {
-  // Fetch site configuration and navigation from CMS
-  const [navItems, configItems] = await Promise.all([
+  // Fetch site configuration, navigation, and standalone products from CMS
+  const [navItems, configItems, standaloneItems] = await Promise.all([
     getPublishedItems('navigation').catch(() => []),
     getPublishedItems('site-config').catch(() => []),
+    getPublishedItems('standalone-product').catch(() => []),
   ]);
 
   const navData = navItems[0]?.data as Record<string, unknown> | undefined;
   const configData = configItems[0]?.data as Record<string, unknown> | undefined;
 
+  // Generate standalone product navigation items from CMS data
+  const standaloneNavItems: MegaDropdownItem[] = standaloneItems.map((item) => {
+    const data = item.data as Record<string, unknown>;
+    const externalUrl = data.externalUrl as string | undefined;
+    return {
+      id: (data.id as string) || item.slug || '',
+      title: (data.title as string) || item.title,
+      description: (data.description as string) || '',
+      href: externalUrl || `/products/standalone/${item.slug || data.id}`,
+      badge: (data.status as string) === '内测中' ? '内测中' : undefined,
+    };
+  });
+
+  // Build megaDropdown with standalone products dynamically injected
+  const baseMegaDropdown = (navData?.megaDropdown as Record<string, MegaDropdownGroup[]>) || MEGA_DROPDOWN_DATA;
+  const megaDropdown: Record<string, MegaDropdownGroup[]> = {};
+  for (const [key, groups] of Object.entries(baseMegaDropdown)) {
+    if (key === 'products' && standaloneNavItems.length > 0) {
+      megaDropdown[key] = groups.map((group) => {
+        if (group.id === 'standalone-products') {
+          return { ...group, description: undefined, items: standaloneNavItems };
+        }
+        return group;
+      });
+    } else {
+      megaDropdown[key] = groups;
+    }
+  }
+
   const siteConfig: SiteConfig = {
     name: (configData?.name as string) || COMPANY_INFO.name,
     shortName: (configData?.shortName as string) || COMPANY_INFO.shortName,
@@ -104,7 +134,7 @@ export default async function RootLayout({
     icp: (configData?.icp as string) || COMPANY_INFO.icp,
     police: (configData?.police as string) || COMPANY_INFO.police,
     mainNav: (navData?.mainNav as NavigationItem[]) || NAVIGATION_V2,
-    megaDropdown: (navData?.megaDropdown as Record<string, MegaDropdownGroup[]>) || MEGA_DROPDOWN_DATA,
+    megaDropdown,
   };
 
   return (