如何改变钩子的样式？

// useTheme.js
import { useState } from 'react';

export function useTheme() {
  const [theme, setTheme] = useState('light');

  const toggleTheme = () => {
    setTheme(theme === 'light' ? 'dark' : 'light');
  };

  return { theme, toggleTheme };
}

// App.js
import React from 'react';
import { useTheme } from './useTheme';

function App() {
  const { theme, toggleTheme } = useTheme();

  const themeStyles = {
    light: {
      backgroundColor: 'white',
      color: 'black',
    },
    dark: {
      backgroundColor: 'black',
      color: 'white',
    },
  };

  return (
    <div style={themeStyles[theme]}>
      <h1>Current Theme: {theme}</h1>
      <button onClick={toggleTheme}>Toggle Theme</button>
    </div>
  );
}

export default App;