feat: MeshCore SAR - Flutter BLE mesh radio companion app

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

test/widget_test.dart

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+// This is a basic Flutter widget test.
+//
+// To perform an interaction with a widget in your test, use the WidgetTester
+// utility in the flutter_test package. For example, you can send tap and scroll
+// gestures. You can also use WidgetTester to find child widgets in the widget
+// tree, read text, and verify that the values of widget properties are correct.
+
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:meshcore_sar_app/main.dart';
+
+void main() {
+  testWidgets('App launches smoke test', (WidgetTester tester) async {
+    // Build our app and trigger a frame.
+    await tester.pumpWidget(const MeshCoreSarApp());
+
+    // Verify that our app title appears.
+    expect(find.text('MeshCore SAR'), findsOneWidget);
+
+    // Verify the tab bar appears with tabs
+    expect(find.text('Messages'), findsOneWidget);
+    expect(find.text('Contacts'), findsOneWidget);
+    expect(find.text('Map'), findsOneWidget);
+  });
+}