Enhance contact handling and UI updates across multiple screens

add unfiltered contact access and improve last seen resolution

lib/screens/path_trace_map.dart

@@ -76,6 +76,8 @@ class PathTraceMapScreen extends StatefulWidget {
 
 class _PathTraceMapScreenState extends State<PathTraceMapScreen> {
   static const double _labelZoomThreshold = 8.5;
+  //miles to meters conversion for filtering out repeaters that are too far from the last known GPS hop to be a likely match, to avoid false matches that throw off the inferred positions of other hops in the path
+  static const double _maxRepeaterMatchDistanceMeters = 40 * 1609.344;
 
   StreamSubscription<Uint8List>? _frameSubscription;
   Timer? _timeoutTimer;
@@ -268,17 +270,41 @@ class _PathTraceMapScreenState extends State<PathTraceMapScreen> {
           .toList();
 
       Map<int, Contact> pathContacts = {};
+      Contact lastContact = Contact(
+        path: Uint8List(0),
+        pathLength: 0,
+        publicKey: connector.selfPublicKey ?? Uint8List(0),
+        name: context.l10n.pathTrace_you,
+        type: advTypeChat,
+        latitude: connector.selfLatitude,
+        longitude: connector.selfLongitude,
+        lastSeen: DateTime.now(),
+      );
       if (widget.pathContacts != null) {
         pathContacts = {for (var c in widget.pathContacts!) c.publicKey[0]: c};
       } else {
-        final contacts = connector.allContacts;
+        final contacts = connector.allContactsUnfiltered
+            .map((c) => connector.getFromDiscovered(c))
+            .toList();
         contacts.where((c) => c.type != advTypeChat).forEach((repeater) {
+          if (lastContact.latitude != null &&
+              lastContact.longitude != null &&
+              repeater.hasLocation &&
+              lastContact.hasLocation &&
+              Distance().distance(
+                    LatLng(lastContact.latitude!, lastContact.longitude!),
+                    LatLng(repeater.latitude!, repeater.longitude!),
+                  ) >
+                  _maxRepeaterMatchDistanceMeters) {
+            return; //skip reapeaters that are far away from the last one with known GPS, to avoid false matches
+          }
           for (var repeaterData in pathData) {
             if (listEquals(
               repeater.publicKey.sublist(0, 1),
               Uint8List.fromList([repeaterData]),
             )) {
               pathContacts[repeaterData] = repeater;
+              lastContact = repeater;
             }
           }
         });