Refactor AppBarTitle widget to remove unused style parameter; update related screens to reflect changes

Improve SNR handling by adding validation for spreading factor range in snrUiFromSNR function
Update contact handling in MeshCoreConnector to fix variable naming and improve readability
Stop parsing unsupported LPP types in CayenneLpp to avoid misalignment

lib/connector/meshcore_connector.dart

@@ -3475,7 +3475,7 @@ class MeshCoreConnector extends ChangeNotifier {
     final isNewContact = !_knownContactKeys.contains(contactKeyHex);
 
     if (isNewContact) {
-      final newContect = Contact(
+      final newContact = Contact(
         publicKey: publicKey,
         name: name,
         type: type,
@@ -3485,8 +3485,8 @@ class MeshCoreConnector extends ChangeNotifier {
         longitude: longitude,
         lastSeen: DateTime.fromMillisecondsSinceEpoch(timestamp * 1000),
       );
-      _handleContactAdvert(newContect);
-      _updateDirectRepeater(newContect, snr, path);
+      _handleContactAdvert(newContact);
+      _updateDirectRepeater(newContact, snr, path);
       return;
     }
 
@@ -3546,7 +3546,7 @@ class MeshCoreConnector extends ChangeNotifier {
     if (isTracked.isNotEmpty) {
       final repeater = isTracked.first;
       repeater.update(snr);
-    } else if (isTracked.isEmpty && _directRepeaters.length < 5) {
+    } else if (_directRepeaters.length < 5) {
       _directRepeaters.add(
         DirectRepeater(pubkeyFirstByte: pubkeyFirstByte, snr: snr),
       );