feat: Add support for hash and private channels with corresponding UI updates

- Introduced new localization strings for channel types and their descriptions in Italian, German, Spanish, French, Croatian, Slovenian, and English.
- Updated the `AppProvider` to handle channel info reception, including deletion of channels and updating the UI accordingly.
- Enhanced `ChannelsProvider` to support channel removal and notify listeners.
- Modified `ConnectionProvider` to include methods for checking empty channel slots and deleting channels.
- Updated BLE service methods to handle channel deletion and verification.
- Improved the `AddChannelDialog` to differentiate between hash and private channels, including dynamic UI elements based on channel type.
- Added delete functionality for channels in the `ContactTile` widget with confirmation dialogs.
- Adjusted permission request dialog behavior to allow dismissing by tapping outside.

lib/providers/contacts_provider.dart

@@ -194,6 +194,8 @@ class ContactsProvider with ChangeNotifier {
   /// Add or update a contact
   /// Excludes contacts that match the device's own public key
   void addOrUpdateContact(Contact contact, {Uint8List? devicePublicKey}) {
+    debugPrint('📝 [ContactsProvider] addOrUpdateContact called: ${contact.advName} (type: ${contact.type.displayName}, key: ${contact.publicKeyHex.substring(0, 8)}...)');
+    
     // Don't add contacts that match our device's public key
     if (devicePublicKey != null &&
         _publicKeysMatch(contact.publicKey, devicePublicKey)) {
@@ -205,6 +207,7 @@ class ContactsProvider with ChangeNotifier {
 
     // Check if this is a new contact
     final isNewContact = !_contacts.containsKey(contact.publicKeyHex);
+    debugPrint('   isNew: $isNewContact, total contacts before: ${_contacts.length}');
 
     Contact updatedContact;
     if (isNewContact) {
@@ -242,8 +245,10 @@ class ContactsProvider with ChangeNotifier {
     }
 
     _contacts[contact.publicKeyHex] = updatedContact;
+    debugPrint('   ✅ Contact added/updated. Total contacts: ${_contacts.length}, channels: ${channels.length}');
     _persistContacts();
     notifyListeners();
+    debugPrint('   🔔 notifyListeners() called');
   }
 
   /// Compare two public keys for equality