feat: Initialize AI Studio project structure

Sets up the basic project files and dependencies for an AI Studio application. Includes README, `.env.example`, `.gitignore`, basic HTML structure, metadata, `package.json`, Vite configuration, and initial React component setup. This commit provides the foundation for running and deploying the AI Studio app locally.

src/App.tsx

@@ -0,0 +1,26 @@
+import { useState } from 'react';
+import { Dashboard } from './components/Dashboard';
+import { Sidebar } from './components/Sidebar';
+import { Header } from './components/Header';
+
+export default function App() {
+  const [currentView, setCurrentView] = useState('overall');
+
+  const viewTitles: Record<string, string> = {
+    'overall': '全网精细化运营大盘',
+    'efficiency': '各站点调度与效能监控',
+    'users': '平台用户与资产池'
+  };
+
+  return (
+    <div className="flex h-screen bg-slate-50 overflow-hidden font-sans">
+      <Sidebar currentView={currentView} setCurrentView={setCurrentView} />
+      <div className="flex flex-col flex-1 overflow-hidden">
+        <Header title={viewTitles[currentView] || '数据分析'} />
+        <main className="flex-1 overflow-y-auto p-4 md:p-6 lg:p-8">
+          <Dashboard currentView={currentView} />
+        </main>
+      </div>
+    </div>
+  );
+}