feat: creats frontend for the project

frontend/src/App.tsx

@@ -0,0 +1,31 @@
+import { Routes, Route, Navigate } from 'react-router-dom';
+import { useAuth } from './context/AuthContext';
+import { Layout } from './components/Layout';
+import { LoginPage } from './pages/LoginPage';
+import { HistoryPage } from './pages/HistoryPage';
+import { AnalyticsPage } from './pages/AnalyticsPage';
+import { SettingsPage } from './pages/SettingsPage';
+
+export function App() {
+  const { user, loading } = useAuth();
+
+  if (loading) {
+    return <div className="app-loading">Загрузка...</div>;
+  }
+
+  if (!user) {
+    return <LoginPage />;
+  }
+
+  return (
+    <Layout>
+      <Routes>
+        <Route path="/" element={<Navigate to="/history" replace />} />
+        <Route path="/history" element={<HistoryPage />} />
+        <Route path="/analytics" element={<AnalyticsPage />} />
+        <Route path="/settings" element={<SettingsPage />} />
+        <Route path="*" element={<Navigate to="/history" replace />} />
+      </Routes>
+    </Layout>
+  );
+}