Remove showDirectMessageDialog usage

test/services/map_marker_service_test.dart

@@ -0,0 +1,63 @@
+import 'dart:typed_data';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/models/contact.dart';
+import 'package:meshcore_sar_app/services/map_marker_service.dart';
+import 'package:meshcore_sar_app/widgets/common/contact_avatar.dart';
+
+void main() {
+  Contact buildContact({
+    required String name,
+    required ContactType type,
+    required int advLat,
+    required int advLon,
+  }) {
+    return Contact(
+      publicKey: Uint8List(32),
+      type: type,
+      flags: 0,
+      outPathLen: 0,
+      outPath: Uint8List(0),
+      advName: name,
+      lastAdvert: DateTime.now().millisecondsSinceEpoch,
+      advLat: advLat,
+      advLon: advLon,
+      lastMod: DateTime.now().millisecondsSinceEpoch,
+    );
+  }
+
+  testWidgets('contact map markers render shared contact avatars', (tester) async {
+    final service = MapMarkerService();
+    final contact = buildContact(
+      name: 'John Smith',
+      type: ContactType.chat,
+      advLat: (46.0569 * 1e6).round(),
+      advLon: (14.5058 * 1e6).round(),
+    );
+
+    late Widget markerChild;
+
+    await tester.pumpWidget(
+      MaterialApp(
+        home: Builder(
+          builder: (context) {
+            final markers = service.generateContactMarkers(
+              contacts: [contact],
+              context: context,
+            );
+            markerChild = markers.single.child;
+            return const SizedBox.shrink();
+          },
+        ),
+      ),
+    );
+
+    await tester.pumpWidget(
+      MaterialApp(home: Scaffold(body: Center(child: markerChild))),
+    );
+
+    expect(find.byType(ContactAvatar), findsOneWidget);
+    expect(find.text('JS'), findsOneWidget);
+  });
+}