refactor: migrate from react-router-dom to react-router

src/pages/DashboardPage.tsx

@@ -1,7 +1,7 @@
 import { Button } from '@/components/ui/button'
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card'
 import { useAuth } from '@/contexts/AuthContext'
-import { useNavigate } from 'react-router-dom'
+import { useNavigate } from 'react-router'
 
 export function DashboardPage() {
   const { user, logout } = useAuth()