first commit

frontend/src/App.tsx

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+import { Routes, Route, Navigate } from 'react-router-dom';
+import ProtectedRoute from './components/auth/ProtectedRoute';
+import AppShell from './components/layout/AppShell';
+import LoginPage from './pages/LoginPage';
+import RegisterPage from './pages/RegisterPage';
+import WatchlistPage from './pages/WatchlistPage';
+import TickerDetailPage from './pages/TickerDetailPage';
+import ScannerPage from './pages/ScannerPage';
+import RankingsPage from './pages/RankingsPage';
+import AdminPage from './pages/AdminPage';
+
+export default function App() {
+  return (
+    <Routes>
+      <Route path="/login" element={<LoginPage />} />
+      <Route path="/register" element={<RegisterPage />} />
+      <Route element={<ProtectedRoute />}>
+        <Route element={<AppShell />}>
+          <Route path="/" element={<Navigate to="/watchlist" />} />
+          <Route path="/watchlist" element={<WatchlistPage />} />
+          <Route path="/ticker/:symbol" element={<TickerDetailPage />} />
+          <Route path="/scanner" element={<ScannerPage />} />
+          <Route path="/rankings" element={<RankingsPage />} />
+          <Route element={<ProtectedRoute requireAdmin />}>
+            <Route path="/admin" element={<AdminPage />} />
+          </Route>
+        </Route>
+      </Route>
+    </Routes>
+  );
+}