test: add footer theme contrast coverage

app/components/Footer.theme-contrast.test.tsx

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+import type { AnchorHTMLAttributes, ReactNode } from 'react';
+import { render, screen } from '@testing-library/react';
+import { describe, expect, it, vi } from 'vitest';
+import { Footer } from './Footer';
+
+vi.mock('next/link', () => ({
+  default: ({
+    href,
+    children,
+    className,
+    ...props
+  }: {
+    href: string;
+    children: ReactNode;
+    className?: string;
+  } & AnchorHTMLAttributes<HTMLAnchorElement>) => (
+    <a href={href} className={className} {...props}>
+      {children}
+    </a>
+  ),
+}));
+
+vi.mock('@/context/TranslationContext', () => ({
+  useTranslation: () => ({
+    t: (key: string, values?: Record<string, string>) => {
+      const translations: Record<string, string> = {
+        'footer.home': 'Home',
+        'footer.generator': 'Generator',
+        'footer.compare': 'Compare',
+        'footer.customization': 'Customization',
+        'footer.contributors': 'Contributors',
+        'footer.documentation': 'Documentation',
+        'footer.github_repo': 'GitHub Repo',
+        'footer.github': 'GitHub',
+        'footer.creator_github': 'Creator GitHub',
+        'footer.discord': 'Discord',
+        'footer.twitter': 'Twitter',
+        'footer.linkedin': 'LinkedIn',
+        'footer.tagline': 'Track your open-source journey.',
+        'footer.navigation': 'Navigation',
+        'footer.resources': 'Resources',
+        'footer.connect': 'Connect',
+        'footer.made_with': 'Made with love',
+        'footer.copyright': `© ${values?.year} CommitPulse`,
+      };
+
+      return translations[key] ?? key;
+    },
+  }),
+}));
+
+describe('Footer theme contrast visual cohesion', () => {
+  it('renders footer with light theme contrast classes', () => {
+    render(<Footer />);
+
+    const footer = screen.getByRole('contentinfo');
+
+    expect(footer).toHaveClass('bg-white/50');
+    expect(footer).toHaveClass('border-black/5');
+    expect(footer).toHaveClass('backdrop-blur');
+  });
+
+  it('renders footer with dark theme contrast classes', () => {
+    render(<Footer />);
+
+    const footer = screen.getByRole('contentinfo');
+
+    expect(footer).toHaveClass('dark:bg-zinc-950/50');
+    expect(footer).toHaveClass('dark:border-white/5');
+  });
+
+  it('keeps heading text readable in both light and dark modes', () => {
+    render(<Footer />);
+
+    expect(screen.getByText('CommitPulse')).toHaveClass('text-black');
+    expect(screen.getByText('CommitPulse')).toHaveClass('dark:text-white');
+    expect(screen.getByText('Navigation')).toHaveClass('text-black');
+    expect(screen.getByText('Navigation')).toHaveClass('dark:text-white');
+    expect(screen.getByText('Resources')).toHaveClass('text-black');
+    expect(screen.getByText('Resources')).toHaveClass('dark:text-white');
+    expect(screen.getByText('Connect')).toHaveClass('text-black');
+    expect(screen.getByText('Connect')).toHaveClass('dark:text-white');
+  });
+
+  it('keeps footer links readable and interactive across themes', () => {
+    render(<Footer />);
+
+    const homeLink = screen.getByRole('link', { name: 'Home' });
+    const githubLink = screen.getByRole('link', { name: 'GitHub Repo' });
+
+    expect(homeLink).toHaveClass('text-zinc-600');
+    expect(homeLink).toHaveClass('dark:text-zinc-400');
+    expect(homeLink).toHaveClass('hover:text-teal-800');
+    expect(homeLink).toHaveClass('dark:hover:text-violet-400');
+
+    expect(githubLink).toHaveClass('text-zinc-600');
+    expect(githubLink).toHaveClass('dark:text-zinc-400');
+  });
+
+  it('keeps overlays and divider styles from clipping foreground content', () => {
+    render(<Footer />);
+
+    const footer = screen.getByRole('contentinfo');
+    const tagline = screen.getByText('Track your open-source journey.');
+    const copyright = screen.getByText(`© ${new Date().getFullYear()} CommitPulse`);
+
+    expect(footer).toHaveClass('px-4');
+    expect(footer).toHaveClass('py-8');
+    expect(tagline).toHaveClass('text-zinc-600');
+    expect(tagline).toHaveClass('dark:text-zinc-400');
+    expect(copyright.parentElement).toHaveClass('text-zinc-500');
+    expect(copyright.parentElement).toHaveClass('dark:text-zinc-500');
+  });
+});