tsx
import React, { useEffect } from 'react'
import { PromptEnhancer } from './components/PromptEnhancer'
import { ErrorBoundary } from './components/ErrorBoundary'

/**
 * Main application component for Prompt Enhancer
 * Handles dark mode initialization and renders the main application
 */
function App() {
  useEffect(() => {
    // Ensure dark mode is applied on mount
    document.documentElement.classList.add('dark')
  }, [])

  return (
    <ErrorBoundary>
      <div className="min-h-screen bg-gray-50 dark:bg-gray-900 transition-colors duration-200">
        <header className="border-b border-gray-200 dark:border-gray-700 bg-white dark:bg-gray-800 transition-colors duration-200">
          <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-6">
            <div className="flex items-center justify-between">
              <div className="flex items-center space-x-3">
                <div className="w-10 h-10 bg-gradient-to-br from-primary-500 to-secondary-500 rounded-xl flex items-center justify-center">
                  <svg className="w-6 h-6 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9.663 17h4.673M12 3v1m6.364 1.636l-.707.707M21 12h-1M4 12H3m3.343-5.657l-.707-.707m2.828 9.9a5 5 0 117.072 0l-.548.547A3.374 3.374 0 0014 18.469V19a2 2 0 11-4 0v-.531c0-.895-.356-1.754-.988-2.386l-.548-.547z" />
                  </svg>
                </div>
                <div>
                  <h1 className="text-2xl font-bold text-gray-900 dark:text-gray-100">
                    Prompt Enhancer
                  </h1>
                  <p className="text-sm text-gray-600 dark:text-gray-400">
                    Optimiere deine KI-Prompts automatisch
                  </p>
                </div>
              </div>
              
              <div className="flex items-center space-x-2">
                <div className="px-3 py-1 bg-primary-100 dark:bg-primary-900 text-primary-800 dark:text-primary-200 rounded-full text-sm font-medium">
                  v1.0.0
                </div>
              </div>
            </div>
          </div>
        </header>

        <main className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-8">
          <PromptEnhancer />
        </main>

        <footer className="border-t border-gray-200 dark:border-gray-700 bg-white dark:bg-gray-800 transition-colors duration-200 mt-16">
          <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-8">
            <div className="flex flex-col md:flex-row justify-between items-center space-y-4 md:space-y-0">
              <div className="text-sm text-gray-600 dark:text-gray-400">
                © 2024 Prompt Enhancer. Erstellt für optimale KI-Interaktionen.
              </div>
              <div className="flex space-x-6">
                <a href="#" className="text-sm text-gray-600 dark:text-gray-400 hover:text-primary-600 dark:hover:text-primary-400 transition-colors duration-200">
                  Datenschutz
                </a>
                <a href="#" className="text-sm text-gray-600 dark:text-gray-400 hover:text-primary-600 dark:hover:text-primary-400 transition-colors duration-200">
                  Impressum
                </a>
                <a href="#" className="text-sm text-gray-600 dark:text-gray-400 hover:text-primary-600 dark:hover:text-primary-400 transition-colors duration-200">
                  GitHub
                </a>
              </div>
            </div>
          </div>
        </footer>
      </div>
    </ErrorBoundary>
  )
}

export default App

</html>