Add missing turf import for flyover animation

frontend/src/App.jsx

@@ -1,6 +1,7 @@
 import React, { useState, useEffect, useRef } from 'react';
 import maplibregl from 'maplibre-gl';
 import 'maplibre-gl/dist/maplibre-gl.css';
+import * as turf from '@turf/turf';
 import apiService from './services/api';
 import './styles/App.css';