Harden findmydevice GPS jitter filtering

php/api.php

@@ -358,12 +358,19 @@ if ($historySets) {
         foreach ($historyData[0] as $item) {
             $lat = $item['attributes']['latitude'] ?? null;
             $lng = $item['attributes']['longitude'] ?? null;
+            $accuracy = $item['attributes']['gps_accuracy'] ?? $item['attributes']['accuracy'] ?? null;
             $time = $item['last_changed'] ?? null;
             if ($lat && $lng && $time) {
                 $timeKey = (string)(strtotime((string)$time) ?: $time);
                 $key = $timeKey . ':' . round((float)$lat, 5) . ':' . round((float)$lng, 5);
                 if (!isset($pathByKey[$key])) {
-                    $pathByKey[$key] = ['lat' => $lat, 'lng' => $lng, 'time' => $time, 'source' => $profile];
+                    $pathByKey[$key] = [
+                        'lat' => $lat,
+                        'lng' => $lng,
+                        'time' => $time,
+                        'accuracy' => is_numeric($accuracy) ? (float)$accuracy : null,
+                        'source' => $profile,
+                    ];
                 }
             }
         }
@@ -457,6 +464,8 @@ function smoothPath(array $path): array
             'lat' => ((float)$prev['lat'] + ((float)$cur['lat'] * 2) + (float)$next['lat']) / 4,
             'lng' => ((float)$prev['lng'] + ((float)$cur['lng'] * 2) + (float)$next['lng']) / 4,
             'time' => $cur['time'],
+            'accuracy' => $cur['accuracy'] ?? null,
+            'source' => $cur['source'] ?? null,
         ];
     }