Fix map basemap tiles and add hurricane click-to-map feature

- Replace CARTO basemap tiles (now require API key) with OpenFreeMap
  vector tiles (positron for light, liberty for dark) — no key needed
- Add click handlers on hurricane panel cards to fly to storm on map
- Add flyToHurricane(): switches to map tab, enables hurricane overlay,
  flies to storm coords, shows popup with storm details
- Add /api/hurricanes/track proxy to fetch NHC GIS 5-day forecast track
  line and render it as a dashed overlay on the map

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/public/app.js

@@ -60,10 +60,13 @@ function parseNhcCoord(str) {
   return (m[2].toUpperCase() === 'S' || m[2].toUpperCase() === 'W') ? -v : v;
 }
 
+let hurricaneStorms = [];
+
 function renderHurricanePanel(storms) {
   const panel = document.getElementById('hurricane-panel');
   if (!panel) return;
   if (!storms || !storms.length) { panel.innerHTML = ''; return; }
+  hurricaneStorms = storms;
   const catLabel = c => {
     if (!c) return '';
     const up = c.toUpperCase();
@@ -86,7 +89,7 @@ function renderHurricanePanel(storms) {
     const lat = parseNhcCoord(s.latitude);
     const lon = parseNhcCoord(s.longitude);
     return `
-    <div class="hurricane-storm-card">
+    <div class="hurricane-storm-card" style="cursor:pointer" title="Click to view on map">
       <div class="hurricane-header">
         <span class="hurricane-name">${s.name || 'Storm'}</span>
         <span class="hurricane-cat-badge ${catLabel(s.classification)}">${catName(s.classification)}</span>
@@ -96,9 +99,61 @@ function renderHurricanePanel(storms) {
         ${s.pressure ? `<span>Pressure: ${s.pressure} mb</span>` : ''}
         <span>${isNaN(lat) ? s.latitude : lat.toFixed(1)+'°'}, ${isNaN(lon) ? s.longitude : Math.abs(lon).toFixed(1)+'°'+(lon < 0 ? 'W' : 'E')}</span>
         ${s.movement ? `<span>Moving ${s.movement}</span>` : ''}
+        <span style="color:var(--accent,#4da6ff);font-size:0.75em">🗺 View on map</span>
       </div>
     </div>
   `}).join('');
+  panel.querySelectorAll('.hurricane-storm-card').forEach((card, i) => {
+    card.addEventListener('click', () => flyToHurricane(hurricaneStorms[i]));
+  });
+}
+
+async function flyToHurricane(storm) {
+  const lat = parseNhcCoord(storm.latitude);
+  const lon = parseNhcCoord(storm.longitude);
+  if (isNaN(lat) || isNaN(lon)) return;
+
+  activateTab('unified-map');
+
+  if (!state.unifiedMapLayers.hurricane) {
+    state.unifiedMapLayers.hurricane = true;
+    const cb = document.querySelector('#tab-unified-map input[data-layer="hurricane"]');
+    if (cb) cb.checked = true;
+  }
+
+  await new Promise(r => setTimeout(r, 450));
+
+  const map = mapsOverview.map;
+  if (!map) return;
+
+  await renderHurricaneOverlay(map);
+  map.flyTo({ center: [lon, lat], zoom: 5, duration: 900 });
+
+  setTimeout(() => {
+    const cat = (storm.classification || '').toUpperCase();
+    const label = cat === 'HU' ? 'Hurricane' : cat === 'TS' ? 'Tropical Storm' : 'Tropical Depression';
+    new maplibregl.Popup({ closeButton: true, maxWidth: '240px' })
+      .setLngLat([lon, lat])
+      .setHTML(`<b>${storm.name || 'Storm'}</b><br>${label}<br>Winds: ${storm.intensity || '--'} mph${storm.movement ? '<br>Moving ' + storm.movement : ''}`)
+      .addTo(map);
+  }, 950);
+
+  if (storm.id) {
+    try {
+      const trackData = await fetch(`/api/hurricanes/track?stormId=${encodeURIComponent(storm.id)}`).then(r => r.json());
+      if (trackData?.type === 'FeatureCollection' && trackData.features?.length) {
+        ['hurricane-track'].forEach(id => {
+          if (map.getLayer(id)) map.removeLayer(id);
+          if (map.getSource(id)) map.removeSource(id);
+        });
+        map.addSource('hurricane-track', { type: 'geojson', data: trackData });
+        map.addLayer({
+          id: 'hurricane-track', type: 'line', source: 'hurricane-track',
+          paint: { 'line-color': '#ff5722', 'line-width': 2.5, 'line-dasharray': [4, 2] },
+        });
+      }
+    } catch {}
+  }
 }
 
 function renderPrecipChart(h, startIdx) {
@@ -771,19 +826,17 @@ function createRadar(mapEl, timelineEl, playBtn, tsEl, layerBtn) {
   const baseMapType = mapEl?.id === 'unified-map' ? state.unifiedMapBaseLayer : 'dark';
 
   function buildStyle(type) {
-    const tileUrl = type === 'light'
-      ? 'https://a.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png'
-      : type === 'satellite'
-        ? 'https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x}'
-        : 'https://a.basemaps.cartocdn.com/dark_all/{z}/{x}/{y}.png';
-    return {
-      version: 8,
-      sources: {
-        base: { type: 'raster', tiles: [tileUrl], tileSize: 256,
-          attribution: '© OpenStreetMap contributors, © CARTO' }
-      },
-      layers: [{ id: 'base', type: 'raster', source: 'base' }],
-    };
+    if (type === 'satellite') {
+      return {
+        version: 8,
+        sources: { base: { type: 'raster', tileSize: 256, attribution: '© Esri',
+          tiles: ['https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x}'] } },
+        layers: [{ id: 'base', type: 'raster', source: 'base' }],
+      };
+    }
+    return type === 'light'
+      ? 'https://tiles.openfreemap.org/styles/positron'
+      : 'https://tiles.openfreemap.org/styles/liberty';
   }
 
   const map = new maplibregl.Map({