Added frontend tests

frontend/src/IntroPage.test.tsx

@@ -1,8 +1,12 @@
 import { render, screen } from '@testing-library/react';
+import { BrowserRouter } from 'react-router-dom'
 import IntroPage from './IntroPage';
 
 test('renders CodeBrewery title', () => {
-   render(<IntroPage />);
+   render(
+   <BrowserRouter>
+   <IntroPage />
+   </BrowserRouter>);
    const titleElement = screen.getByText(/CodeBrewery/i);
    expect(titleElement).toBeInTheDocument();
 });

frontend/src/IntroPage.tsx

@@ -2,7 +2,7 @@ import React from 'react';
 import { Code2, Sparkles, Terminal, Cpu, Beer, Wine } from 'lucide-react';
 import { useNavigate } from 'react-router-dom';
 
-export function IntroPage() {
+export default function IntroPage() {
     const navigate = useNavigate();
 
   return (