feat: Add channel deletion functionality with localization support

lib/l10n/app_fr.arb

@@ -2780,6 +2780,10 @@
   "invalidAsciiCharacters": "Seuls les caractères ASCII sont autorisés",
   "channelCreatedSuccessfully": "Canal créé avec succès",
   "channelCreationFailed": "Échec de la création du canal : {error}",
+  "deleteChannel": "Supprimer le Canal",
+  "deleteChannelConfirmation": "Êtes-vous sûr de vouloir supprimer le canal \"{channelName}\" ? Cette action ne peut pas être annulée.",
+  "channelDeletedSuccessfully": "Canal supprimé avec succès",
+  "channelDeletionFailed": "Échec de la suppression du canal : {error}",
   "allChannelSlotsInUse": "Tous les emplacements de canaux sont utilisés (maximum 39 canaux personnalisés)",
   "createChannel": "Créer un Canal",
 

lib/l10n/app_it.arb

@@ -2780,6 +2780,10 @@
   "invalidAsciiCharacters": "Sono consentiti solo caratteri ASCII",
   "channelCreatedSuccessfully": "Canale creato con successo",
   "channelCreationFailed": "Creazione del canale fallita: {error}",
+  "deleteChannel": "Elimina Canale",
+  "deleteChannelConfirmation": "Sei sicuro di voler eliminare il canale \"{channelName}\"? Questa azione non può essere annullata.",
+  "channelDeletedSuccessfully": "Canale eliminato con successo",
+  "channelDeletionFailed": "Eliminazione del canale fallita: {error}",
   "allChannelSlotsInUse": "Tutti gli slot dei canali sono in uso (massimo 39 canali personalizzati)",
   "createChannel": "Crea Canale",
 

lib/l10n/app_localizations.dart

@@ -3777,6 +3777,30 @@ abstract class AppLocalizations {
   /// **'Failed to create channel: {error}'**
   String channelCreationFailed(String error);
 
+  /// Delete channel button/menu item
+  ///
+  /// In en, this message translates to:
+  /// **'Delete Channel'**
+  String get deleteChannel;
+
+  /// Confirmation dialog when deleting a channel
+  ///
+  /// In en, this message translates to:
+  /// **'Are you sure you want to delete channel \"{channelName}\"? This action cannot be undone.'**
+  String deleteChannelConfirmation(String channelName);
+
+  /// Success message after deleting channel
+  ///
+  /// In en, this message translates to:
+  /// **'Channel deleted successfully'**
+  String get channelDeletedSuccessfully;
+
+  /// Error message when channel deletion fails
+  ///
+  /// In en, this message translates to:
+  /// **'Failed to delete channel: {error}'**
+  String channelDeletionFailed(String error);
+
   /// Error when no channel slots available
   ///
   /// In en, this message translates to:

lib/l10n/app_localizations_de.dart

@@ -2109,6 +2109,22 @@ class AppLocalizationsDe extends AppLocalizations {
     return 'Kanal konnte nicht erstellt werden: $error';
   }
 
+  @override
+  String get deleteChannel => 'Kanal löschen';
+
+  @override
+  String deleteChannelConfirmation(String channelName) {
+    return 'Sind Sie sicher, dass Sie den Kanal \"$channelName\" löschen möchten? Diese Aktion kann nicht rückgängig gemacht werden.';
+  }
+
+  @override
+  String get channelDeletedSuccessfully => 'Kanal erfolgreich gelöscht';
+
+  @override
+  String channelDeletionFailed(String error) {
+    return 'Kanal konnte nicht gelöscht werden: $error';
+  }
+
   @override
   String get allChannelSlotsInUse =>
       'Alle Kanalplätze sind belegt (maximal 39 benutzerdefinierte Kanäle)';

lib/l10n/app_localizations_en.dart

@@ -2088,6 +2088,22 @@ class AppLocalizationsEn extends AppLocalizations {
     return 'Failed to create channel: $error';
   }
 
+  @override
+  String get deleteChannel => 'Delete Channel';
+
+  @override
+  String deleteChannelConfirmation(String channelName) {
+    return 'Are you sure you want to delete channel \"$channelName\"? This action cannot be undone.';
+  }
+
+  @override
+  String get channelDeletedSuccessfully => 'Channel deleted successfully';
+
+  @override
+  String channelDeletionFailed(String error) {
+    return 'Failed to delete channel: $error';
+  }
+
   @override
   String get allChannelSlotsInUse =>
       'All channel slots are in use (maximum 39 custom channels)';

lib/l10n/app_localizations_es.dart

@@ -2114,6 +2114,22 @@ class AppLocalizationsEs extends AppLocalizations {
     return 'Error al crear el canal: $error';
   }
 
+  @override
+  String get deleteChannel => 'Eliminar Canal';
+
+  @override
+  String deleteChannelConfirmation(String channelName) {
+    return '¿Está seguro de que desea eliminar el canal \"$channelName\"? Esta acción no se puede deshacer.';
+  }
+
+  @override
+  String get channelDeletedSuccessfully => 'Canal eliminado exitosamente';
+
+  @override
+  String channelDeletionFailed(String error) {
+    return 'Error al eliminar el canal: $error';
+  }
+
   @override
   String get allChannelSlotsInUse =>
       'Todos los espacios de canales están en uso (máximo 39 canales personalizados)';

lib/l10n/app_localizations_fr.dart

@@ -2119,6 +2119,22 @@ class AppLocalizationsFr extends AppLocalizations {
     return 'Échec de la création du canal : $error';
   }
 
+  @override
+  String get deleteChannel => 'Supprimer le Canal';
+
+  @override
+  String deleteChannelConfirmation(String channelName) {
+    return 'Êtes-vous sûr de vouloir supprimer le canal \"$channelName\" ? Cette action ne peut pas être annulée.';
+  }
+
+  @override
+  String get channelDeletedSuccessfully => 'Canal supprimé avec succès';
+
+  @override
+  String channelDeletionFailed(String error) {
+    return 'Échec de la suppression du canal : $error';
+  }
+
   @override
   String get allChannelSlotsInUse =>
       'Tous les emplacements de canaux sont utilisés (maximum 39 canaux personnalisés)';

lib/l10n/app_localizations_hr.dart

@@ -2098,6 +2098,22 @@ class AppLocalizationsHr extends AppLocalizations {
     return 'Neuspješno kreiranje kanala: $error';
   }
 
+  @override
+  String get deleteChannel => 'Izbriši kanal';
+
+  @override
+  String deleteChannelConfirmation(String channelName) {
+    return 'Jeste li sigurni da želite izbrisati kanal \"$channelName\"? Ova radnja se ne može poništiti.';
+  }
+
+  @override
+  String get channelDeletedSuccessfully => 'Kanal uspješno izbrisan';
+
+  @override
+  String channelDeletionFailed(String error) {
+    return 'Neuspješno brisanje kanala: $error';
+  }
+
   @override
   String get allChannelSlotsInUse =>
       'Svi slotovi kanala su zauzeti (maksimalno 39 prilagođenih kanala)';

lib/l10n/app_localizations_it.dart

@@ -2109,6 +2109,22 @@ class AppLocalizationsIt extends AppLocalizations {
     return 'Creazione del canale fallita: $error';
   }
 
+  @override
+  String get deleteChannel => 'Elimina Canale';
+
+  @override
+  String deleteChannelConfirmation(String channelName) {
+    return 'Sei sicuro di voler eliminare il canale \"$channelName\"? Questa azione non può essere annullata.';
+  }
+
+  @override
+  String get channelDeletedSuccessfully => 'Canale eliminato con successo';
+
+  @override
+  String channelDeletionFailed(String error) {
+    return 'Eliminazione del canale fallita: $error';
+  }
+
   @override
   String get allChannelSlotsInUse =>
       'Tutti gli slot dei canali sono in uso (massimo 39 canali personalizzati)';

lib/l10n/app_localizations_sl.dart

@@ -2097,6 +2097,22 @@ class AppLocalizationsSl extends AppLocalizations {
     return 'Neuspešno ustvarjanje kanala: $error';
   }
 
+  @override
+  String get deleteChannel => 'Izbriši kanal';
+
+  @override
+  String deleteChannelConfirmation(String channelName) {
+    return 'Ali ste prepričani, da želite izbrisati kanal \"$channelName\"? Tega dejanja ni mogoče razveljaviti.';
+  }
+
+  @override
+  String get channelDeletedSuccessfully => 'Kanal uspešno izbrisan';
+
+  @override
+  String channelDeletionFailed(String error) {
+    return 'Neuspešno brisanje kanala: $error';
+  }
+
   @override
   String get allChannelSlotsInUse =>
       'Vsa mesta za kanale so zasedena (maksimalno 39 prilagojenih kanalov)';

lib/screens/messages_tab.dart

@@ -183,6 +183,9 @@ class _MessagesTabState extends State<MessagesTab> {
     final rooms = contactsProvider.contacts
         .where((c) => c.type == ContactType.room)
         .toList();
+    final channels = contactsProvider.contacts
+        .where((c) => c.type == ContactType.channel)
+        .toList();
 
     showModalBottomSheet(
       context: context,
@@ -191,6 +194,7 @@ class _MessagesTabState extends State<MessagesTab> {
       builder: (context) => RecipientSelectorSheet(
         contacts: contacts,
         rooms: rooms,
+        channels: channels,
         currentDestinationType: _destinationType,
         currentRecipientPublicKey: _selectedRecipient?.publicKeyHex,
         onSelect: _onRecipientSelected,
@@ -200,12 +204,6 @@ class _MessagesTabState extends State<MessagesTab> {
 
   /// Handle recipient selection
   Future<void> _onRecipientSelected(String type, Contact? recipient) async {
-    // Get display name before async gap
-    final recipientName =
-        type == MessageDestinationPreferences.destinationTypeChannel
-        ? AppLocalizations.of(context)!.publicChannel
-        : (recipient?.displayName ?? recipient?.advName ?? 'Unknown');
-
     setState(() {
       _destinationType = type;
       _selectedRecipient = recipient;
@@ -238,8 +236,9 @@ class _MessagesTabState extends State<MessagesTab> {
   String _getDestinationTooltip() {
     final l10n = AppLocalizations.of(context)!;
     if (_destinationType ==
-        MessageDestinationPreferences.destinationTypeChannel) {
+        MessageDestinationPreferences.destinationTypeChannel && _selectedRecipient != null) {
-      return '${l10n.publicChannel} (tap to change)';
+      final channelName = _selectedRecipient!.getLocalizedDisplayName(context);
+      return '$channelName (tap to change)';
     } else if (_selectedRecipient != null) {
       final recipientName =
           _selectedRecipient!.displayName ?? _selectedRecipient!.advName;
@@ -266,8 +265,9 @@ class _MessagesTabState extends State<MessagesTab> {
       // Check destination type and send accordingly
       if (_destinationType ==
           MessageDestinationPreferences.destinationTypeChannel) {
-        // Send to public channel
+        // Send to selected channel (or public channel if none selected)
-        await _sendToChannel(text, connectionProvider, messagesProvider);
+        final channelIdx = _selectedRecipient?.publicKey[1] ?? 0; // Extract channel index from pseudo public key
+        await _sendToChannel(text, connectionProvider, messagesProvider, channelIdx);
       } else if (_selectedRecipient != null) {
         // Send to contact or room
         await _sendToRecipient(
@@ -279,9 +279,9 @@ class _MessagesTabState extends State<MessagesTab> {
       } else {
         // Fallback to public channel if no recipient selected
         debugPrint(
-          '⚠️ [MessagesTab] No recipient selected, falling back to channel',
+          '⚠️ [MessagesTab] No recipient selected, falling back to public channel',
         );
-        await _sendToChannel(text, connectionProvider, messagesProvider);
+        await _sendToChannel(text, connectionProvider, messagesProvider, 0);
       }
 
       _textController.clear();
@@ -294,11 +294,12 @@ class _MessagesTabState extends State<MessagesTab> {
     }
   }
 
-  /// Send message to public channel
+  /// Send message to channel
   Future<void> _sendToChannel(
     String text,
     ConnectionProvider connectionProvider,
     MessagesProvider messagesProvider,
+    int channelIdx,
   ) async {
     // Create message ID
     final messageId = '${DateTime.now().millisecondsSinceEpoch}_channel_sent';
@@ -319,15 +320,15 @@ class _MessagesTabState extends State<MessagesTab> {
       text: text,
       receivedAt: DateTime.now(),
       deliveryStatus: MessageDeliveryStatus.sending,
-      channelIdx: 0,
+      channelIdx: channelIdx,
     );
 
     // Add to messages list with "sending" status
     messagesProvider.addSentMessage(sentMessage);
 
-    // Send to public channel (channel 0)
+    // Send to selected channel
     await connectionProvider.sendChannelMessage(
-      channelIdx: 0,
+      channelIdx: channelIdx,
       text: text,
       messageId: messageId,
     );

lib/widgets/messages/recipient_selector_sheet.dart

@@ -6,6 +6,7 @@ import '../../l10n/app_localizations.dart';
 class RecipientSelectorSheet extends StatefulWidget {
   final List<Contact> contacts;
   final List<Contact> rooms;
+  final List<Contact> channels;
   final String? currentDestinationType;
   final String? currentRecipientPublicKey;
   final Function(String type, Contact? recipient) onSelect;
@@ -14,6 +15,7 @@ class RecipientSelectorSheet extends StatefulWidget {
     super.key,
     required this.contacts,
     required this.rooms,
+    required this.channels,
     this.currentDestinationType,
     this.currentRecipientPublicKey,
     required this.onSelect,
@@ -45,7 +47,6 @@ class _RecipientSelectorSheetState extends State<RecipientSelectorSheet> {
 
   bool _isSelected(String type, Contact? contact) {
     if (widget.currentDestinationType != type) return false;
-    if (type == 'channel') return true;
     if (contact == null) return false;
     return contact.publicKeyHex == widget.currentRecipientPublicKey;
   }
@@ -55,6 +56,7 @@ class _RecipientSelectorSheetState extends State<RecipientSelectorSheet> {
     final l10n = AppLocalizations.of(context)!;
     final filteredContacts = _filterContacts(widget.contacts);
     final filteredRooms = _filterContacts(widget.rooms);
+    final filteredChannels = _filterContacts(widget.channels);
 
     return Container(
       constraints: BoxConstraints(
@@ -136,18 +138,50 @@ class _RecipientSelectorSheetState extends State<RecipientSelectorSheet> {
             child: ListView(
               shrinkWrap: true,
               children: [
-                // Public Channel option
+                // Channels section
-                _buildRecipientTile(
+                if (widget.channels.isNotEmpty) ...[
+                  Padding(
+                    padding: const EdgeInsets.symmetric(
+                      horizontal: 16,
+                      vertical: 8,
+                    ),
+                    child: Text(
+                      l10n.channels,
+                      style: Theme.of(context).textTheme.titleSmall?.copyWith(
+                        color: Theme.of(context).colorScheme.primary,
+                        fontWeight: FontWeight.bold,
+                      ),
+                    ),
+                  ),
+                  if (filteredChannels.isEmpty)
+                    Padding(
+                      padding: const EdgeInsets.all(16),
+                      child: Text(
+                        l10n.noChannelsFound,
+                        style: Theme.of(context).textTheme.bodyMedium?.copyWith(
+                          color: Theme.of(context).disabledColor,
+                          fontStyle: FontStyle.italic,
+                        ),
+                        textAlign: TextAlign.center,
+                      ),
+                    )
+                  else
+                    ...filteredChannels.map((channel) {
+                      return _buildRecipientTile(
                         context: context,
                         icon: Icons.public,
-                  title: l10n.publicChannel,
+                        title: channel.getLocalizedDisplayName(context),
-                  subtitle: l10n.broadcastToAllNearby,
+                        subtitle: channel.isPublicChannel
-                  isSelected: _isSelected('channel', null),
+                            ? l10n.broadcastToAllNearby
+                            : '${l10n.channel} ${channel.publicKey[1]}', // Show slot number
+                        isSelected: _isSelected('channel', channel),
                         onTap: () {
-                    widget.onSelect('channel', null);
+                          widget.onSelect('channel', channel);
                           Navigator.pop(context);
                         },
-                ),
+                      );
+                    }),
+                ],
 
                 const Divider(),
 
@@ -242,7 +276,7 @@ class _RecipientSelectorSheetState extends State<RecipientSelectorSheet> {
                 ],
 
                 // Empty state
-                if (widget.contacts.isEmpty && widget.rooms.isEmpty) ...[
+                if (widget.contacts.isEmpty && widget.rooms.isEmpty && widget.channels.isEmpty) ...[
                   Padding(
                     padding: const EdgeInsets.all(32),
                     child: Column(
@@ -254,22 +288,13 @@ class _RecipientSelectorSheetState extends State<RecipientSelectorSheet> {
                         ),
                         const SizedBox(height: 16),
                         Text(
-                          l10n.noContactsOrRoomsAvailable,
+                          l10n.noRecipientsAvailable,
                           style: Theme.of(context).textTheme.bodyLarge
                               ?.copyWith(
                                 color: Theme.of(context).disabledColor,
                               ),
                           textAlign: TextAlign.center,
                         ),
-                        const SizedBox(height: 8),
-                        Text(
-                          l10n.messagesWillBeSentToPublicChannel,
-                          style: Theme.of(context).textTheme.bodySmall
-                              ?.copyWith(
-                                color: Theme.of(context).disabledColor,
-                              ),
-                          textAlign: TextAlign.center,
-                        ),
                       ],
                     ),
                   ),