test(web): add Vitest tests for search, auth, public, and admin layouts

- SearchLayout: verifies children pass-through (3 tests)
- AuthLayout: verifies role=main, #main-content, max-w-md centering (5 tests)
- PublicLayout: verifies navbar, ticker strip, footer, compare bar, #main-content (8 tests)
- AdminLayout: verifies sidebar nav, auth guard, loading state, logout, mobile toggle (10 tests)

All 156 web test files pass (1157 total web tests). Pre-existing API test
failures in unrelated modules (auth OTP handler, projects, search indexer,
admin settings encryption) are outside scope of this task.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/web/app/[locale]/(public)/__tests__/layout.spec.tsx

@@ -0,0 +1,170 @@
+/* eslint-disable import-x/order */
+/**
+ * Kiểm thử PublicLayout: navbar, ticker strip, footer, main content.
+ */
+import { render, screen } from '@testing-library/react';
+import * as React from 'react';
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+// Mock next-intl
+const viMessages = await import('@/messages/vi.json');
+vi.mock('next-intl', () => ({
+  useTranslations: (namespace?: string) => {
+    const messages = viMessages.default ?? viMessages;
+    const ns = namespace
+      ? (messages[namespace as keyof typeof messages] as Record<string, unknown> | undefined)
+      : (messages as unknown as Record<string, unknown>);
+    return (key: string) => {
+      if (!ns) return key;
+      const parts = key.split('.');
+      let val: unknown = ns;
+      for (const p of parts) {
+        val = (val as Record<string, unknown>)?.[p];
+      }
+      return typeof val === 'string' ? val : key;
+    };
+  },
+  useLocale: () => 'vi',
+  NextIntlClientProvider: ({ children }: { children: React.ReactNode }) => <>{children}</>,
+}));
+
+vi.mock('next/navigation', () => ({
+  useRouter: () => ({ push: vi.fn(), replace: vi.fn() }),
+  usePathname: () => '/',
+}));
+
+vi.mock('@/i18n/navigation', () => ({
+  Link: ({ children, href, ...props }: { children: React.ReactNode; href: string; [key: string]: unknown }) => (
+    <a href={href as string} {...props}>{children}</a>
+  ),
+  useRouter: () => ({ push: vi.fn(), replace: vi.fn() }),
+  usePathname: () => '/',
+}));
+
+vi.mock('@/lib/auth-store', () => ({
+  useAuthStore: () => ({
+    user: null,
+    logout: vi.fn(),
+  }),
+}));
+
+vi.mock('@/components/providers/theme-provider', () => ({
+  useTheme: () => ({ theme: 'light', toggleTheme: vi.fn() }),
+}));
+
+vi.mock('@/components/notifications/notification-bell', () => ({
+  NotificationBell: () => <button aria-label="Thông báo">🔔</button>,
+}));
+
+vi.mock('@/components/comparison/compare-floating-bar', () => ({
+  CompareFloatingBar: () => <div data-testid="compare-bar" />,
+}));
+
+vi.mock('@/components/design-system/ticker-strip', () => ({
+  TickerStrip: ({ items }: { items: unknown[] }) => (
+    <div data-testid="ticker-strip" aria-label="ticker">{items.length} items</div>
+  ),
+}));
+
+vi.mock('@/components/design-system/navbar', () => ({
+  Navbar: ({ brand, links }: { brand: string; links: { label: string }[] }) => (
+    <nav data-testid="navbar" aria-label="main-nav">
+      <span>{brand}</span>
+      {links.map((l) => <span key={l.label}>{l.label}</span>)}
+    </nav>
+  ),
+}));
+
+vi.mock('@/components/design-system/footer', () => ({
+  Footer: ({ brand, copyright }: { brand: string; copyright: string }) => (
+    <footer data-testid="footer">
+      <span>{brand}</span>
+      <span>{copyright}</span>
+    </footer>
+  ),
+}));
+
+vi.mock('@/components/ui/language-switcher', () => ({
+  LanguageSwitcher: () => <div data-testid="lang-switcher" />,
+}));
+
+import PublicLayout from '../layout';
+
+describe('PublicLayout', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it('renders main content wrapper with role="main"', () => {
+    render(
+      <PublicLayout>
+        <div data-testid="page">Trang chính</div>
+      </PublicLayout>,
+    );
+    expect(screen.getByRole('main')).toBeInTheDocument();
+    expect(screen.getByTestId('page')).toBeInTheDocument();
+  });
+
+  it('renders children inside main', () => {
+    render(
+      <PublicLayout>
+        <h1>Tiêu đề trang</h1>
+      </PublicLayout>,
+    );
+    expect(screen.getByText('Tiêu đề trang')).toBeInTheDocument();
+  });
+
+  it('renders the navbar', () => {
+    render(
+      <PublicLayout>
+        <div>Content</div>
+      </PublicLayout>,
+    );
+    expect(screen.getByTestId('navbar')).toBeInTheDocument();
+  });
+
+  it('renders the ticker strip', () => {
+    render(
+      <PublicLayout>
+        <div>Content</div>
+      </PublicLayout>,
+    );
+    expect(screen.getByTestId('ticker-strip')).toBeInTheDocument();
+  });
+
+  it('renders the footer', () => {
+    render(
+      <PublicLayout>
+        <div>Content</div>
+      </PublicLayout>,
+    );
+    expect(screen.getByTestId('footer')).toBeInTheDocument();
+  });
+
+  it('renders the compare floating bar', () => {
+    render(
+      <PublicLayout>
+        <div>Content</div>
+      </PublicLayout>,
+    );
+    expect(screen.getByTestId('compare-bar')).toBeInTheDocument();
+  });
+
+  it('ticker strip has 8 district items', () => {
+    render(
+      <PublicLayout>
+        <div>Content</div>
+      </PublicLayout>,
+    );
+    expect(screen.getByText('8 items')).toBeInTheDocument();
+  });
+
+  it('main content has id="main-content" for skip-nav', () => {
+    const { container } = render(
+      <PublicLayout>
+        <div>Content</div>
+      </PublicLayout>,
+    );
+    expect(container.querySelector('#main-content')).toBeInTheDocument();
+  });
+});