feat: 初始化多Agent协作系统项目并添加直播回放功能

- 添加导航栏组件及直播回放按钮
- 实现视频播放模态框
- 配置赛博朋克风格主题
- 添加课程首页和课程页面

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/App.tsx

@@ -0,0 +1,32 @@
+import React from 'react';
+import { BrowserRouter as Router, Routes, Route } from 'react-router-dom';
+import Navigation from './components/Navigation';
+import ScrollToTop from './components/ScrollToTop';
+import CyberpunkBackground from './components/CyberpunkBackground';
+import CyberpunkVignette from './components/CyberpunkVignette';
+import HomePage from './pages/HomePage';
+import CoursePage from './pages/CoursePage';
+
+const App: React.FC = () => {
+  return (
+    <Router>
+      <ScrollToTop />
+      <div className="min-h-screen relative">
+        <CyberpunkBackground />
+        <CyberpunkVignette
+          intensity="strong"
+          variant="neon"
+        />
+        <Navigation />
+        <div className="container mx-auto px-4 pt-20 relative z-10">
+          <Routes>
+            <Route path="/" element={<HomePage />} />
+            <Route path="/course" element={<CoursePage />} />
+          </Routes>
+        </div>
+      </div>
+    </Router>
+  );
+};
+
+export default App;