Msg Retry fixes, channel message fixes. Notification fixes. Make more desktop friendly. Enhance retry algo. Fix predicted location clustering add retries to reactions and fix the reactions in private DMS centralize and cleanup code in var areas

test/helpers/path_helper_test.dart

@@ -0,0 +1,36 @@
+import 'dart:typed_data';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_open/connector/meshcore_protocol.dart';
+import 'package:meshcore_open/helpers/path_helper.dart';
+import 'package:meshcore_open/models/contact.dart';
+
+Contact _contact({
+  required int firstByte,
+  required String name,
+  required int type,
+}) {
+  final key = Uint8List(32)..[0] = firstByte;
+  return Contact(
+    publicKey: key,
+    name: name,
+    type: type,
+    pathLength: 0,
+    path: Uint8List(0),
+    lastSeen: DateTime.now(),
+  );
+}
+
+void main() {
+  test('resolvePathNames ignores chat nodes and keeps repeater/room nodes', () {
+    final contacts = [
+      _contact(firstByte: 0xF2, name: 'MunTui', type: advTypeChat),
+      _contact(firstByte: 0x7E, name: 'zrepeater', type: advTypeRepeater),
+      _contact(firstByte: 0xBA, name: 'USS Ronald Reagan', type: advTypeRoom),
+    ];
+
+    final resolved = PathHelper.resolvePathNames([0xF2, 0x7E, 0xBA], contacts);
+
+    expect(resolved, equals('F2 → zrepeater → USS Ronald Reagan'));
+  });
+}