Fix remote portal map tiles and geocode

- history.js reads tile URL from data-tile-url attribute on #history-map div,
  falling back to local offline tiles (Pi behavior unchanged)
- server history.html sets data-tile-url to live OSM tiles
- maxZoom raised to 19 (OSM supports it, local tiles were limited to 15)
- server geocode returns 'label' key to match what history.js/yaris.js expect

Co-authored-by: Copilot <[email protected]>

server/app.py

@@ -542,7 +542,7 @@ def geocode():
     lon4 = int(round(lon, 4) * 10000)
     name = _geocode_cached(lat4, lon4)
     if name:
-        return jsonify(name=name)
+        return jsonify(label=name)
     return jsonify(name=None), 204
 
 

server/templates/history.html

@@ -53,7 +53,9 @@
                 </div>
             </div>
             <div class="card-body p-0">
-                <div id="history-map" aria-label="Selected trip route map"></div>
+                <div id="history-map" aria-label="Selected trip route map"
+                     data-tile-url="https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png"
+                     data-tile-attrib="&copy; <a href='https://www.openstreetmap.org/copyright'>OpenStreetMap</a> contributors"></div>
                 <div id="trip-timeline" class="border-top p-3" hidden>
                     <div class="d-flex align-items-center gap-3">
                         <button id="trip-play" class="btn btn-primary btn-sm" type="button" aria-label="Play">