feat: 로그인 페이지 리다이렉션 로직 추가

src/components/ProtectedRoute.tsx

+import { Navigate, Outlet } from 'react-router';
+import { useAuthStore } from '@/stores/authStore';
+
+export default function ProtectedRoute() {
+  const { token } = useAuthStore();
+
+  if (!token) {
+    return <Navigate to="/login" replace />;
+  }
+
+  return <Outlet />;
+}

src/routes.tsx

 import { Routes, Route } from 'react-router';
+import ProtectedRoute from '@/components/ProtectedRoute';
 import Root from '@/pages/Root';
 import NotFound from '@/pages/NotFound';
 import Home from '@/pages/Home';
@@ -17,8 +18,10 @@ export default function AppRoutes() {
   return (
     <Routes>
       <Route path="/" element={<Root />}>
-        <Route index element={<Home />} />
         <Route path="login" element={<Login />} />
+
+        <Route element={<ProtectedRoute />}>
+          <Route index element={<Home />} />
           <Route path="routing">
             <Route index element={<RoutingList />} />
             <Route path="create" element={<RoutingCreate />} />
@@ -36,6 +39,8 @@ export default function AppRoutes() {
           <Route path="log">
             <Route index element={<LogList />} />
           </Route>
+        </Route>
+
         <Route path="*" element={<NotFound />} />
       </Route>
     </Routes>