feat(map): reverse geocode location + recenter button on dashboard and history

- Dashboard: recenter button in GPS card header (hidden until first fix)
- Dashboard: estimated location name under lat/lon via Nominatim reverse geocode (throttled 30s)
- History: recenter button fits map back to trip bounds
- Both buttons use crosshairs icon, hidden until data is available

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

static/js/history.js

@@ -21,6 +21,7 @@
     let replayPoints = [];
     let replayTimer = null;
     let replayController = null;
+    const recenterBtn = document.getElementById("btn-recenter-history");
 
     function formatDuration(seconds) {
         const hours = Math.floor(seconds / 3600);
@@ -132,6 +133,14 @@
         } else if (coordinates.length === 1) {
             map.setView(coordinates[0], 15);
         }
+        recenterBtn.hidden = false;
+        recenterBtn.onclick = function () {
+            if (coordinates.length > 1) {
+                map.fitBounds(routeLayer.getBounds(), { padding: [24, 24] });
+            } else if (coordinates.length === 1) {
+                map.setView(coordinates[0], 15);
+            }
+        };
         summary.textContent = `${formatDistance(result.trip.distance_km)} · `
             + `${formatDuration(result.trip.duration_seconds)} · `
             + `avg ${formatSpeed(result.trip.average_speed_kmh)} · `

static/js/yaris.js

@@ -185,6 +185,31 @@ socket.on('obd_error', function (data) {
 });
 
 let mapCentered = false;
+let _lastLat = null, _lastLon = null;
+let _geocodeTimer = null;
+
+const _recenterBtn = document.getElementById('btn-recenter');
+_recenterBtn.addEventListener('click', function () {
+    if (_lastLat != null && _lastLon != null) {
+        map.setView([_lastLat, _lastLon], 15);
+    }
+});
+
+function reverseGeocode(lat, lon) {
+    fetch(`https://nominatim.openstreetmap.org/reverse?format=jsonv2&lat=${lat}&lon=${lon}`, {
+        headers: { 'Accept-Language': 'en' }
+    })
+    .then(r => r.ok ? r.json() : null)
+    .then(data => {
+        if (!data) return;
+        const a = data.address || {};
+        const name = a.road || a.hamlet || a.village || a.suburb || '';
+        const city = a.city || a.town || a.village || a.municipality || '';
+        const label = [name, city].filter(Boolean).join(', ');
+        document.getElementById('gps-location-name').textContent = label || data.display_name?.split(',').slice(0,2).join(',') || '';
+    })
+    .catch(() => {});
+}
 
 socket.on('gps_location', function(data) {
     console.log("location received")
@@ -204,6 +229,14 @@ socket.on('gps_location', function(data) {
             map.setView([lat, lon], 15);
             mapCentered = true;
         }
+        _lastLat = lat;
+        _lastLon = lon;
+        _recenterBtn.hidden = false;
+        // Throttle geocode to at most once every 30s
+        if (!_geocodeTimer) {
+            reverseGeocode(lat, lon);
+            _geocodeTimer = setTimeout(() => { _geocodeTimer = null; }, 30000);
+        }
     }
 });
 

templates/history.html

@@ -46,8 +46,13 @@
         <div class="card shadow-sm">
             <div class="card-header py-2 d-flex justify-content-between align-items-center">
                 <h6 class="text-primary fw-bold m-0">Route replay</h6>
+                <div class="d-flex align-items-center gap-2">
+                    <button id="btn-recenter-history" class="btn btn-outline-secondary btn-sm" type="button" title="Recenter map" hidden>
+                        <i class="fas fa-crosshairs" aria-hidden="true"></i>
+                    </button>
                     <span id="trip-summary" class="small text-muted">Select a trip</span>
                 </div>
+            </div>
             <div class="card-body p-0">
                 <div id="history-map" aria-label="Selected trip route map"></div>
                 <div id="trip-timeline" class="border-top p-3" hidden>

templates/index.html

@@ -95,13 +95,17 @@
 <div class="row g-3 mb-3">
     <div class="col-lg-4 col-xl-3">
         <div class="card shadow-sm h-100">
-            <div class="card-header py-2">
+            <div class="card-header py-2 d-flex justify-content-between align-items-center">
                 <h6 class="text-primary fw-bold m-0">Live GPS</h6>
+                <button id="btn-recenter" class="btn btn-outline-secondary btn-sm" type="button" title="Recenter map" hidden>
+                    <i class="fas fa-crosshairs" aria-hidden="true"></i>
+                </button>
             </div>
             <div class="card-body p-0">
                 <div id="map"></div>
             </div>
-            <div class="card-footer py-2 d-flex gap-4 bg-white border-top">
+            <div class="card-footer py-2 bg-white border-top">
+                <div class="d-flex gap-4 mb-1">
                     <div>
                         <div class="text-xs text-muted fw-bold text-uppercase">Lat</div>
                         <div id="gpsLocationX" class="fw-semibold small">—</div>
@@ -111,6 +115,8 @@
                         <div id="gpsLocationY" class="fw-semibold small">—</div>
                     </div>
                 </div>
+                <div id="gps-location-name" class="text-muted small" style="font-size:0.75rem;min-height:1rem"></div>
+            </div>
         </div>
     </div>
     <div class="col-lg-3 col-xl-2">