chore(init): initial commit

src/App.test.tsx

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+import { describe, expect, it } from 'vitest'
+import { render, screen } from '@testing-library/react'
+import App from './App'
+
+describe('App', () => {
+  it('affiche le contenu minimal', () => {
+    render(<App />)
+    expect(screen.getByRole('heading', { level: 1, name: 'Hello world' })).toBeInTheDocument()
+  })
+})

src/App.tsx

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+function App() {
+  return (
+    <main>
+      <h1>Hello world</h1>
+    </main>
+  )
+}
+
+export default App

src/main.tsx

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+import { StrictMode } from 'react'
+import { createRoot } from 'react-dom/client'
+import App from './App'
+import './style.css'
+
+createRoot(document.getElementById('root')!).render(
+  <StrictMode>
+    <App />
+  </StrictMode>,
+)

src/style.css

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+@import 'tailwindcss';

src/test/setup.ts

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+import '@testing-library/jest-dom/vitest'

src/vite-env.d.ts

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+/// <reference types="vite/client" />
+/// <reference types="vite-plugin-pwa/client" />