src/main.jsx

import React, { useEffect, useState } from 'react';
import ReactDOM from 'react-dom/client';
import App from './components/App.jsx';

export const ThemeContext = React.createContext();

const ThemeProvider = ({ children }) => {
  const [theme, setTheme] = useState(() => {
    if (typeof window !== 'undefined') {
      return localStorage.getItem('theme') || 'light';
    }
    return 'light';
  });

  useEffect(() => {
    document.documentElement.classList.toggle('dark', theme === 'dark');
    localStorage.setItem('theme', theme);
  }, [theme]);

  return (
    <ThemeContext.Provider value={{ theme, setTheme }}>
      {children}
    </ThemeContext.Provider>
  );
};

ReactDOM.createRoot(document.getElementById('root')).render(
  <ThemeProvider>
    <App />
  </ThemeProvider>
);