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

lib/helpers/path_helper.dart

@@ -0,0 +1,31 @@
+import '../models/contact.dart';
+import '../connector/meshcore_protocol.dart';
+
+class PathHelper {
+  static String formatPathHex(List<int> pathBytes) {
+    return pathBytes
+        .map((b) => b.toRadixString(16).padLeft(2, '0').toUpperCase())
+        .join(',');
+  }
+
+  static String resolvePathNames(
+    List<int> pathBytes,
+    List<Contact> allContacts,
+  ) {
+    return pathBytes
+        .map((b) {
+          final hex = b.toRadixString(16).padLeft(2, '0').toUpperCase();
+          final matches = allContacts
+              .where(
+                (c) =>
+                    c.publicKey.first == b &&
+                    (c.type == advTypeRepeater || c.type == advTypeRoom),
+              )
+              .toList();
+          if (matches.isEmpty) return hex;
+          if (matches.length == 1) return matches.first.name;
+          return matches.map((c) => c.name).join(' | ');
+        })
+        .join(' \u2192 ');
+  }
+}