fix(geocode): accurate street name + always shows on dashboard

- Cache key uses 4 decimal places (~11m) instead of 3 (~111m) for correct street
- Dashboard geocodes on first GPS fix, then again every >50m moved (throttled 15s)
- Removed stale console.log

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

app.py

@@ -93,10 +93,10 @@ import functools
 import urllib.request
 
 @functools.lru_cache(maxsize=512)
-def _geocode_cached(lat3, lon3):
+def _geocode_cached(lat4, lon4):
     """Try Nominatim first (street-level), fall back to reverse_geocoder (city)."""
-    lat = lat3 / 1000.0
-    lon = lon3 / 1000.0
+    lat = lat4 / 10000.0
+    lon = lon4 / 10000.0
     try:
         url = f"https://nominatim.openstreetmap.org/reverse?format=jsonv2&lat={lat}&lon={lon}&accept-language=en"
         req = urllib.request.Request(url, headers={"User-Agent": "yaris-obd/1.0"})
@@ -126,7 +126,7 @@ def geocode_route():
     except (KeyError, ValueError):
         return jsonify(error="lat and lon required"), 400
     # Round to 3 decimals (~111m precision) for cache key
-    label = _geocode_cached(round(lat, 3) * 1000 // 1, round(lon, 3) * 1000 // 1)
+    label = _geocode_cached(int(round(lat, 4) * 10000), int(round(lon, 4) * 10000))
     return jsonify(label=label)
 
 @app.route('/api/dash/devices')

static/js/yaris.js

@@ -186,6 +186,7 @@ socket.on('obd_error', function (data) {
 
 let mapCentered = false;
 let _lastLat = null, _lastLon = null;
+let _lastGeoLat = null, _lastGeoLon = null;
 let _geocodeTimer = null;
 
 const _recenterBtn = document.getElementById('btn-recenter');
@@ -198,14 +199,19 @@ _recenterBtn.addEventListener('click', function () {
 function reverseGeocode(lat, lon) {
     const el = document.getElementById('gps-location-name');
     const fallback = `${lat.toFixed(5)}, ${lon.toFixed(5)}`;
-    fetch(`/api/geocode?lat=${lat}&lon=${lon}`, { signal: AbortSignal.timeout(4000) })
+    fetch(`/api/geocode?lat=${lat}&lon=${lon}`, { signal: AbortSignal.timeout(6000) })
         .then(r => r.ok ? r.json() : null)
         .then(data => { el.textContent = (data && data.label) ? data.label : fallback; })
         .catch(() => { el.textContent = fallback; });
 }
 
+function _movedEnough(lat, lon) {
+    if (_lastGeoLat === null) return true;
+    // ~0.0005 deg ≈ 50m
+    return Math.abs(lat - _lastGeoLat) > 0.0005 || Math.abs(lon - _lastGeoLon) > 0.0005;
+}
+
 socket.on('gps_location', function(data) {
-    console.log("location received")
     const LocationX = document.getElementById('gpsLocationX');
     const LocationY = document.getElementById('gpsLocationY');
     LocationX.innerHTML = data[0];
@@ -225,10 +231,12 @@ socket.on('gps_location', function(data) {
         _lastLat = lat;
         _lastLon = lon;
         _recenterBtn.hidden = false;
-        // Throttle geocode to at most once every 30s
-        if (!_geocodeTimer) {
+        // Geocode when moved >50m, throttled to at most once every 15s
+        if (!_geocodeTimer && _movedEnough(lat, lon)) {
+            _lastGeoLat = lat;
+            _lastGeoLon = lon;
             reverseGeocode(lat, lon);
-            _geocodeTimer = setTimeout(() => { _geocodeTimer = null; }, 30000);
+            _geocodeTimer = setTimeout(() => { _geocodeTimer = null; }, 15000);
         }
     }
 });