Add avatars display on map

lib/providers/contacts_provider.dart

@@ -423,9 +423,16 @@ class ContactsProvider with ChangeNotifier {
       debugPrint('  Old lastAdvert: ${contact.lastAdvert}');
       debugPrint('  New lastAdvert: $currentTimestamp');
 
+      final persistedGps = _getValidGpsOrNull(telemetry.gpsLocation);
       final updatedContact = contact.copyWith(
         telemetry: telemetry,
         lastAdvert: currentTimestamp, // Update last seen time
+        advLat: persistedGps != null
+            ? _coordinateToAdvertMicrodegrees(persistedGps.latitude)
+            : contact.advLat,
+        advLon: persistedGps != null
+            ? _coordinateToAdvertMicrodegrees(persistedGps.longitude)
+            : contact.advLon,
       );
       _contacts[contact.publicKeyHex] = updatedContact;
       debugPrint('  ✅ Updated contact in map (with new lastAdvert)');
@@ -476,6 +483,10 @@ class ContactsProvider with ChangeNotifier {
     return incomingGps == null;
   }
 
+  int _coordinateToAdvertMicrodegrees(double coordinate) {
+    return (coordinate * 1e6).round();
+  }
+
   /// Find contact by public key prefix (6 bytes)
   Contact? _findContactByPrefix(Uint8List prefix) {
     if (prefix.length < 6) return null;

lib/providers/helpers/ping_tracker.dart

@@ -46,8 +46,8 @@ class PingTracker {
   /// Mark a ping as successful (response received)
   /// Should be called when telemetry response arrives
   void markPingSuccessful(Uint8List publicKey) {
-    final String keyHex = _publicKeyToHex(publicKey);
+    final requestKey = _findMatchingPendingPingKey(publicKey);
-    final request = _pendingPings.remove(keyHex);
+    final request = requestKey != null ? _pendingPings.remove(requestKey) : null;
 
     if (request != null) {
       request.cancel();
@@ -81,6 +81,23 @@ class PingTracker {
   String _publicKeyToHex(Uint8List publicKey) {
     return publicKey.map((b) => b.toRadixString(16).padLeft(2, '0')).join('');
   }
+
+  String? _findMatchingPendingPingKey(Uint8List responseKey) {
+    final responseHex = _publicKeyToHex(responseKey);
+
+    if (_pendingPings.containsKey(responseHex)) {
+      return responseHex;
+    }
+
+    for (final entry in _pendingPings.entries) {
+      final pendingHex = entry.key;
+      if (pendingHex.startsWith(responseHex) || responseHex.startsWith(pendingHex)) {
+        return pendingHex;
+      }
+    }
+
+    return null;
+  }
 }
 
 /// Internal class to track a single ping request

lib/screens/contacts_tab.dart

@@ -119,6 +119,43 @@ class _ContactsTabState extends State<ContactsTab> {
     return l10n.daysAgo(diff.inDays);
   }
 
+  List<Contact> _sortContactsByDistance(List<Contact> contacts) {
+    final sorted = List<Contact>.from(contacts);
+
+    sorted.sort((a, b) {
+      final distanceA = _distanceFromCurrentPosition(a);
+      final distanceB = _distanceFromCurrentPosition(b);
+
+      if (distanceA != null && distanceB != null) {
+        final distanceCompare = distanceA.compareTo(distanceB);
+        if (distanceCompare != 0) return distanceCompare;
+      } else if (distanceA != null) {
+        return -1;
+      } else if (distanceB != null) {
+        return 1;
+      }
+
+      return b.lastSeenTime.compareTo(a.lastSeenTime);
+    });
+
+    return sorted;
+  }
+
+  double? _distanceFromCurrentPosition(Contact contact) {
+    final currentPosition = _currentPosition;
+    final contactLocation = contact.displayLocation;
+    if (currentPosition == null || contactLocation == null) {
+      return null;
+    }
+
+    return _calculateDistanceInMeters(
+      currentPosition.latitude,
+      currentPosition.longitude,
+      contactLocation.latitude,
+      contactLocation.longitude,
+    );
+  }
+
   /// Show the add channel dialog
   Future<void> _showAddChannelDialog(BuildContext context) async {
     final l10n = AppLocalizations.of(context)!;
@@ -165,10 +202,12 @@ class _ContactsTabState extends State<ContactsTab> {
     return Scaffold(
       body: Consumer<ContactsProvider>(
         builder: (context, contactsProvider, child) {
-          final chatContacts = contactsProvider.chatContacts;
+          final chatContacts = _sortContactsByDistance(
-          final repeaters = contactsProvider.repeaters;
+            contactsProvider.chatContacts,
-          final rooms = contactsProvider.rooms;
+          );
-          final channels = contactsProvider.channels;
+          final repeaters = _sortContactsByDistance(contactsProvider.repeaters);
+          final rooms = _sortContactsByDistance(contactsProvider.rooms);
+          final channels = _sortContactsByDistance(contactsProvider.channels);
           final pendingAdverts = contactsProvider.pendingAdverts;
 
           // Check if there are any displayable contacts (excluding channels)

lib/widgets/contacts/contact_tile.dart

@@ -881,12 +881,23 @@ class ContactTile extends StatelessWidget {
                           TextButton.icon(
                             onPressed: isPingInProgress
                                 ? null
-                                : () {
+                                : () async {
                                     final connectionProvider = context
                                         .read<ConnectionProvider>();
-                                    connectionProvider.requestTelemetry(
+                                    final result = await connectionProvider.smartPing(
-                                      contact.publicKey,
+                                      contactPublicKey: contact.publicKey,
-                                      zeroHop: true,
+                                      hasPath: contact.routeHasPath,
+                                    );
+
+                                    if (!context.mounted || result.success) {
+                                      return;
+                                    }
+
+                                    ToastLogger.error(
+                                      context,
+                                      AppLocalizations.of(
+                                        context,
+                                      )!.pingFailed(contact.displayName),
                                     );
                                   },
                             icon: isPingInProgress

test/providers/contacts_provider_test.dart

@@ -128,6 +128,8 @@ void main() {
       expect(updated.displayLocation, isNotNull);
       expect(updated.displayLocation!.latitude, closeTo(45.0001, 0.0001));
       expect(updated.displayLocation!.longitude, closeTo(13.9999, 0.0001));
+      expect(updated.advLat, equals((45.0001 * 1e6).round()));
+      expect(updated.advLon, equals((13.9999 * 1e6).round()));
     });
 
     test(
@@ -232,6 +234,26 @@ void main() {
       expect(snapshot.location.latitude, closeTo(46.0569, 0.000001));
       expect(snapshot.location.longitude, closeTo(14.5058, 0.000001));
     });
+
+    test('persists last valid telemetry gps on the contact across reloads', () async {
+      final telemetryData = CayenneLppParser.createGpsData(
+        latitude: 45.0001,
+        longitude: 13.9999,
+      );
+
+      provider.updateTelemetry(publicKey.sublist(0, 6), telemetryData);
+      await Future<void>.delayed(Duration.zero);
+
+      final reloadedProvider = ContactsProvider();
+      await reloadedProvider.initializeEarly();
+
+      final reloaded = reloadedProvider.findContactByKey(publicKey)!;
+      expect(reloaded.advLat, equals((45.0001 * 1e6).round()));
+      expect(reloaded.advLon, equals((13.9999 * 1e6).round()));
+      expect(reloaded.advertLocation, isNotNull);
+      expect(reloaded.advertLocation!.latitude, closeTo(45.0001, 0.0001));
+      expect(reloaded.advertLocation!.longitude, closeTo(13.9999, 0.0001));
+    });
   });
 
   group('ContactsProvider route updates', () {

test/providers/helpers/ping_tracker_test.dart

@@ -0,0 +1,27 @@
+import 'dart:typed_data';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/providers/helpers/ping_tracker.dart';
+
+void main() {
+  Uint8List createPublicKey() => Uint8List.fromList(
+    List<int>.generate(32, (index) => index + 1),
+  );
+
+  group('PingTracker', () {
+    test('completes pending ping when response uses public key prefix', () async {
+      final tracker = PingTracker();
+      final publicKey = createPublicKey();
+
+      final pingFuture = tracker.trackPing(
+        publicKey: publicKey,
+        wasDirectAttempt: true,
+      );
+
+      tracker.markPingSuccessful(publicKey.sublist(0, 6));
+
+      await expectLater(pingFuture, completion(isTrue));
+      expect(tracker.hasPendingPing(publicKey), isFalse);
+    });
+  });
+}