Import IKAR messenger client and server

test/chat_membership_test.dart

@@ -0,0 +1,11 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:ikar/core/storage/app_database.dart';
+
+void main() {
+  test('chat list state distinguishes previews from memberships', () {
+    expect(AppDatabase.chatRowIsInList({'in_list': 0}), isFalse);
+    expect(AppDatabase.chatRowIsInList({'in_list': 1}), isTrue);
+    expect(AppDatabase.chatRowIsInList({'in_list': 2}), isTrue);
+    expect(AppDatabase.chatRowIsInList({}), isTrue);
+  });
+}