fix from PR review

lib/services/notification_service.dart

@@ -28,7 +28,8 @@ class NotificationService {
   AppLocalizations get _l10n => lookupAppLocalizations(_locale);
 
   String _logSafe(String value) {
-    return Uri.encodeComponent(value.replaceAll('\n', ' '));
+        final sanitized = value.replaceAll(RegExp(r'[\x00-\x1F\x7F]'), ' ');
+        return Uri.encodeComponent(sanitized);
   }
 
   // Rate limiting to prevent notification storms

lib/widgets/path_selection_dialog.dart

@@ -157,8 +157,8 @@ class _PathSelectionDialogState extends State<PathSelectionDialog> {
       return;
     }
 
-    // Check max path length (64 hops)
-    if (pathBytesList.length > 64) {
+    // Check max path size in bytes, as defined by the protocol.
+    if (pathBytesList.length > maxPathSize) {
       showDismissibleSnackBar(
         context,
         content: Text(l10n.path_tooLong),