Merge pull request #384 from zjs81/clear_toast

clear toast on tap

lib/helpers/link_handler.dart

@@ -3,6 +3,7 @@ import 'package:flutter_linkify/flutter_linkify.dart';
 import 'package:url_launcher/url_launcher.dart';
 import '../l10n/l10n.dart';
 import '../utils/platform_info.dart';
+import '../helpers/snack_bar_builder.dart';
 
 class LinkHandler {
   static TextStyle defaultLinkStyle(BuildContext context, TextStyle base) {
@@ -93,21 +94,19 @@ class LinkHandler {
       final uri = Uri.parse(url);
       if (!await launchUrl(uri, mode: LaunchMode.externalApplication)) {
         if (context.mounted) {
-          ScaffoldMessenger.of(context).showSnackBar(
-            SnackBar(
-              content: Text(context.l10n.chat_couldNotOpenLink(url)),
-              backgroundColor: Colors.red,
-            ),
+          showDismissibleSnackBar(
+            context,
+            content: Text(context.l10n.chat_couldNotOpenLink(url)),
+            backgroundColor: Colors.red,
           );
         }
       }
     } catch (e) {
       if (context.mounted) {
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(
-            content: Text(context.l10n.chat_invalidLink),
-            backgroundColor: Colors.red,
-          ),
+        showDismissibleSnackBar(
+          context,
+          content: Text(context.l10n.chat_invalidLink),
+          backgroundColor: Colors.red,
         );
       }
     }

lib/helpers/snack_bar_builder.dart

@@ -0,0 +1,56 @@
+import 'package:flutter/material.dart';
+
+// showDismissibleSnackBar shows  a [SnackBar] with tap to dismiss
+// all other properties are default and optional
+void showDismissibleSnackBar(
+  BuildContext context, {
+  Key? key,
+  required Widget content,
+  Color? backgroundColor,
+  double? elevation,
+  EdgeInsetsGeometry? margin,
+  EdgeInsetsGeometry? padding,
+  double? width,
+  ShapeBorder? shape,
+  HitTestBehavior? hitTestBehavior,
+  SnackBarBehavior? behavior,
+  SnackBarAction? action,
+  double? actionOverflowThreshold,
+  bool? showCloseIcon,
+  Color? closeIconColor,
+  Duration? duration,
+  bool? persist,
+  Animation<double>? animation,
+  void Function()? onVisible,
+  DismissDirection? dismissDirection,
+  Clip? clipBehavior,
+}) {
+  final messenger = ScaffoldMessenger.of(context);
+  messenger.showSnackBar(
+    SnackBar(
+      key: key,
+      content: GestureDetector(
+        onTap: () => messenger.hideCurrentSnackBar(),
+        child: content,
+      ),
+      backgroundColor: backgroundColor,
+      elevation: elevation,
+      margin: margin,
+      padding: padding,
+      width: width,
+      shape: shape,
+      hitTestBehavior: hitTestBehavior,
+      behavior: behavior,
+      action: action,
+      actionOverflowThreshold: actionOverflowThreshold,
+      showCloseIcon: showCloseIcon,
+      closeIconColor: closeIconColor,
+      duration: duration ?? const Duration(seconds: 4),
+      persist: persist,
+      animation: animation,
+      onVisible: onVisible,
+      dismissDirection: dismissDirection ?? DismissDirection.down,
+      clipBehavior: clipBehavior ?? Clip.hardEdge,
+    ),
+  );
+}

lib/screens/app_debug_log_screen.dart

@@ -5,6 +5,7 @@ import 'package:provider/provider.dart';
 import '../l10n/l10n.dart';
 import '../services/app_debug_log_service.dart';
 import '../widgets/adaptive_app_bar_title.dart';
+import '../helpers/snack_bar_builder.dart';
 
 class AppDebugLogScreen extends StatelessWidget {
   const AppDebugLogScreen({super.key});
@@ -34,8 +35,9 @@ class AppDebugLogScreen extends StatelessWidget {
                             .join('\n');
                         await Clipboard.setData(ClipboardData(text: text));
                         if (!context.mounted) return;
-                        ScaffoldMessenger.of(context).showSnackBar(
-                          SnackBar(content: Text(context.l10n.debugLog_copied)),
+                        showDismissibleSnackBar(
+                          context,
+                          content: Text(context.l10n.debugLog_copied),
                         );
                       }
                     : null,

lib/screens/app_settings_screen.dart

@@ -10,6 +10,7 @@ import '../services/app_settings_service.dart';
 import '../services/notification_service.dart';
 import '../services/translation_service.dart';
 import '../widgets/adaptive_app_bar_title.dart';
+import '../helpers/snack_bar_builder.dart';
 import 'map_cache_screen.dart';
 
 class AppSettingsScreen extends StatelessWidget {
@@ -151,13 +152,12 @@ class AppSettingsScreen extends StatelessWidget {
                     .requestPermissions();
                 if (!granted) {
                   if (context.mounted) {
-                    ScaffoldMessenger.of(context).showSnackBar(
-                      SnackBar(
-                        content: Text(
-                          context.l10n.appSettings_notificationPermissionDenied,
-                        ),
-                        duration: const Duration(seconds: 2),
+                    showDismissibleSnackBar(
+                      context,
+                      content: Text(
+                        context.l10n.appSettings_notificationPermissionDenied,
                       ),
+                      duration: const Duration(seconds: 2),
                     );
                   }
                   return;
@@ -166,15 +166,14 @@ class AppSettingsScreen extends StatelessWidget {
 
               await settingsService.setNotificationsEnabled(value);
               if (context.mounted) {
-                ScaffoldMessenger.of(context).showSnackBar(
-                  SnackBar(
-                    content: Text(
-                      value
-                          ? context.l10n.appSettings_notificationsEnabled
-                          : context.l10n.appSettings_notificationsDisabled,
-                    ),
-                    duration: const Duration(seconds: 2),
+                showDismissibleSnackBar(
+                  context,
+                  content: Text(
+                    value
+                        ? context.l10n.appSettings_notificationsEnabled
+                        : context.l10n.appSettings_notificationsDisabled,
                   ),
+                  duration: const Duration(seconds: 2),
                 );
               }
             },
@@ -301,15 +300,14 @@ class AppSettingsScreen extends StatelessWidget {
             value: settingsService.settings.clearPathOnMaxRetry,
             onChanged: (value) {
               settingsService.setClearPathOnMaxRetry(value);
-              ScaffoldMessenger.of(context).showSnackBar(
-                SnackBar(
-                  content: Text(
-                    value
-                        ? context.l10n.appSettings_pathsWillBeCleared
-                        : context.l10n.appSettings_pathsWillNotBeCleared,
-                  ),
-                  duration: const Duration(seconds: 2),
+              showDismissibleSnackBar(
+                context,
+                content: Text(
+                  value
+                      ? context.l10n.appSettings_pathsWillBeCleared
+                      : context.l10n.appSettings_pathsWillNotBeCleared,
                 ),
+                duration: const Duration(seconds: 2),
               );
             },
           ),
@@ -329,15 +327,14 @@ class AppSettingsScreen extends StatelessWidget {
             value: settingsService.settings.autoRouteRotationEnabled,
             onChanged: (value) {
               settingsService.setAutoRouteRotationEnabled(value);
-              ScaffoldMessenger.of(context).showSnackBar(
-                SnackBar(
-                  content: Text(
-                    value
-                        ? context.l10n.appSettings_autoRouteRotationEnabled
-                        : context.l10n.appSettings_autoRouteRotationDisabled,
-                  ),
-                  duration: const Duration(seconds: 2),
+              showDismissibleSnackBar(
+                context,
+                content: Text(
+                  value
+                      ? context.l10n.appSettings_autoRouteRotationEnabled
+                      : context.l10n.appSettings_autoRouteRotationDisabled,
                 ),
+                duration: const Duration(seconds: 2),
               );
             },
           ),
@@ -1164,8 +1161,9 @@ class AppSettingsScreen extends StatelessWidget {
     String? id,
   }) async {
     if (sourceUrl.isEmpty) {
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text(context.l10n.translation_enterUrlFirst)),
+      showDismissibleSnackBar(
+        context,
+        content: Text(context.l10n.translation_enterUrlFirst),
       );
       return;
     }
@@ -1176,22 +1174,23 @@ class AppSettingsScreen extends StatelessWidget {
         id: id,
       );
       if (!context.mounted) return;
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text(context.l10n.translation_modelDownloaded)),
+      showDismissibleSnackBar(
+        context,
+        content: Text(context.l10n.translation_modelDownloaded),
       );
       await settingsService.setTranslationEnabled(true);
     } on TranslationDownloadCancelled {
       if (!context.mounted) return;
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text(context.l10n.translation_downloadStopped)),
+      showDismissibleSnackBar(
+        context,
+        content: Text(context.l10n.translation_downloadStopped),
       );
     } catch (error) {
       if (!context.mounted) return;
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(
-          content: Text(
-            context.l10n.translation_downloadFailed(error.toString()),
-          ),
+      showDismissibleSnackBar(
+        context,
+        content: Text(
+          context.l10n.translation_downloadFailed(error.toString()),
         ),
       );
     }
@@ -1236,16 +1235,16 @@ class AppSettingsScreen extends StatelessWidget {
     try {
       await translationService.removeModel(model);
       if (!context.mounted) return;
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(
-          // TODO: l10n
-          content: Text('Deleted ${translationModelFriendlyName(model)}.'),
-        ),
+      showDismissibleSnackBar(
+        context,
+        // TODO: l10n
+        content: Text('Deleted ${translationModelFriendlyName(model)}.'),
       );
     } catch (error) {
       if (!context.mounted) return;
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text('Delete failed: $error')),
+      showDismissibleSnackBar(
+        context,
+        content: Text('Delete failed: $error'),
       ); // TODO: l10n
     }
   }
@@ -1279,15 +1278,14 @@ class AppSettingsScreen extends StatelessWidget {
             onChanged: (value) async {
               await settingsService.setAppDebugLogEnabled(value);
               if (!context.mounted) return;
-              ScaffoldMessenger.of(context).showSnackBar(
-                SnackBar(
-                  content: Text(
-                    value
-                        ? context.l10n.appSettings_appDebugLoggingEnabled
-                        : context.l10n.appSettings_appDebugLoggingDisabled,
-                  ),
-                  duration: const Duration(seconds: 2),
+              showDismissibleSnackBar(
+                context,
+                content: Text(
+                  value
+                      ? context.l10n.appSettings_appDebugLoggingEnabled
+                      : context.l10n.appSettings_appDebugLoggingDisabled,
                 ),
+                duration: const Duration(seconds: 2),
               );
             },
           ),

lib/screens/ble_debug_log_screen.dart

@@ -5,6 +5,7 @@ import '../l10n/l10n.dart';
 import '../services/ble_debug_log_service.dart';
 import '../connector/meshcore_protocol.dart';
 import '../widgets/adaptive_app_bar_title.dart';
+import '../helpers/snack_bar_builder.dart';
 
 enum _BleLogView { frames, rawLogRx }
 
@@ -52,10 +53,9 @@ class _BleDebugLogScreenState extends State<BleDebugLogScreen> {
                                   .join('\n');
                         await Clipboard.setData(ClipboardData(text: text));
                         if (!context.mounted) return;
-                        ScaffoldMessenger.of(context).showSnackBar(
-                          SnackBar(
-                            content: Text(context.l10n.debugLog_bleCopied),
-                          ),
+                        showDismissibleSnackBar(
+                          context,
+                          content: Text(context.l10n.debugLog_bleCopied),
                         );
                       }
                     : null,

lib/screens/channel_chat_screen.dart

@@ -14,6 +14,7 @@ import '../connector/meshcore_protocol.dart';
 import '../helpers/gif_helper.dart';
 import '../helpers/reaction_helper.dart';
 import '../helpers/utf8_length_limiter.dart';
+import '../helpers/snack_bar_builder.dart';
 import '../l10n/l10n.dart';
 import '../models/channel.dart';
 import '../models/channel_message.dart';
@@ -144,11 +145,10 @@ class _ChannelChatScreenState extends State<ChannelChatScreen> {
   Future<void> _scrollToMessage(String messageId) async {
     final key = _messageKeys[messageId];
     if (key == null) {
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(
-          content: Text(context.l10n.chat_originalMessageNotFound),
-          duration: const Duration(seconds: 2),
-        ),
+      showDismissibleSnackBar(
+        context,
+        content: Text(context.l10n.chat_originalMessageNotFound),
+        duration: const Duration(seconds: 2),
       );
       return;
     }
@@ -1151,9 +1151,10 @@ class _ChannelChatScreenState extends State<ChannelChatScreen> {
     final now = DateTime.now();
     if (_lastChannelSendAt != null &&
         now.difference(_lastChannelSendAt!) < const Duration(seconds: 1)) {
-      ScaffoldMessenger.of(
+      showDismissibleSnackBar(
         context,
-      ).showSnackBar(SnackBar(content: Text(context.l10n.chat_sendCooldown)));
+        content: Text(context.l10n.chat_sendCooldown),
+      );
       return;
     }
     _lastChannelSendAt = now;
@@ -1195,8 +1196,9 @@ class _ChannelChatScreenState extends State<ChannelChatScreen> {
 
     final maxBytes = maxChannelMessageBytes(connector.selfName);
     if (utf8.encode(messageText).length > maxBytes) {
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text(context.l10n.chat_messageTooLong(maxBytes))),
+      showDismissibleSnackBar(
+        context,
+        content: Text(context.l10n.chat_messageTooLong(maxBytes)),
       );
       return;
     }
@@ -1323,17 +1325,19 @@ class _ChannelChatScreenState extends State<ChannelChatScreen> {
 
   void _copyMessageText(String text) {
     Clipboard.setData(ClipboardData(text: text));
-    ScaffoldMessenger.of(
+    showDismissibleSnackBar(
       context,
-    ).showSnackBar(SnackBar(content: Text(context.l10n.chat_messageCopied)));
+      content: Text(context.l10n.chat_messageCopied),
+    );
   }
 
   Future<void> _deleteMessage(ChannelMessage message) async {
     await context.read<MeshCoreConnector>().deleteChannelMessage(message);
     if (!mounted) return;
-    ScaffoldMessenger.of(
+    showDismissibleSnackBar(
       context,
-    ).showSnackBar(SnackBar(content: Text(context.l10n.chat_messageDeleted)));
+      content: Text(context.l10n.chat_messageDeleted),
+    );
   }
 
   String _formatPathPrefixes(Uint8List pathBytes) {

lib/screens/channels_screen.dart

@@ -24,6 +24,7 @@ import '../widgets/empty_state.dart';
 import '../widgets/qr_code_display.dart';
 import '../widgets/quick_switch_bar.dart';
 import '../widgets/unread_badge.dart';
+import '../helpers/snack_bar_builder.dart';
 import 'channel_chat_screen.dart';
 import 'community_qr_scanner_screen.dart';
 import 'contacts_screen.dart';
@@ -809,15 +810,12 @@ class _ChannelsScreenState extends State<ChannelsScreen>
                               onPressed: () async {
                                 final name = nameController.text.trim();
                                 if (name.isEmpty) {
-                                  ScaffoldMessenger.of(
-                                    dialogContext,
-                                  ).showSnackBar(
-                                    SnackBar(
-                                      content: Text(
-                                        dialogContext
-                                            .l10n
-                                            .channels_enterChannelName,
-                                      ),
+                                  showDismissibleSnackBar(
+                                    context,
+                                    content: Text(
+                                      dialogContext
+                                          .l10n
+                                          .channels_enterChannelName,
                                     ),
                                   );
                                   return;
@@ -837,13 +835,10 @@ class _ChannelsScreenState extends State<ChannelsScreen>
                                   nextIndex,
                                 );
                                 if (context.mounted) {
-                                  ScaffoldMessenger.of(context).showSnackBar(
-                                    SnackBar(
-                                      content: Text(
-                                        context.l10n.channels_channelAdded(
-                                          name,
-                                        ),
-                                      ),
+                                  showDismissibleSnackBar(
+                                    context,
+                                    content: Text(
+                                      context.l10n.channels_channelAdded(name),
                                     ),
                                   );
                                 }
@@ -897,15 +892,12 @@ class _ChannelsScreenState extends State<ChannelsScreen>
                                 final name = nameController.text.trim();
                                 final pskHex = pskController.text.trim();
                                 if (name.isEmpty) {
-                                  ScaffoldMessenger.of(
-                                    dialogContext,
-                                  ).showSnackBar(
-                                    SnackBar(
-                                      content: Text(
-                                        dialogContext
-                                            .l10n
-                                            .channels_enterChannelName,
-                                      ),
+                                  showDismissibleSnackBar(
+                                    context,
+                                    content: Text(
+                                      dialogContext
+                                          .l10n
+                                          .channels_enterChannelName,
                                     ),
                                   );
                                   return;
@@ -914,15 +906,12 @@ class _ChannelsScreenState extends State<ChannelsScreen>
                                 try {
                                   psk = Channel.parsePskHex(pskHex);
                                 } on FormatException {
-                                  ScaffoldMessenger.of(
-                                    dialogContext,
-                                  ).showSnackBar(
-                                    SnackBar(
-                                      content: Text(
-                                        dialogContext
-                                            .l10n
-                                            .channels_pskMustBe32Hex,
-                                      ),
+                                  showDismissibleSnackBar(
+                                    context,
+                                    content: Text(
+                                      dialogContext
+                                          .l10n
+                                          .channels_pskMustBe32Hex,
                                     ),
                                   );
                                   return;
@@ -930,13 +919,10 @@ class _ChannelsScreenState extends State<ChannelsScreen>
                                 Navigator.pop(dialogContext);
                                 connector.setChannel(nextIndex, name, psk);
                                 if (context.mounted) {
-                                  ScaffoldMessenger.of(context).showSnackBar(
-                                    SnackBar(
-                                      content: Text(
-                                        context.l10n.channels_channelAdded(
-                                          name,
-                                        ),
-                                      ),
+                                  showDismissibleSnackBar(
+                                    context,
+                                    content: Text(
+                                      context.l10n.channels_channelAdded(name),
                                     ),
                                   );
                                 }
@@ -967,11 +953,10 @@ class _ChannelsScreenState extends State<ChannelsScreen>
                             Navigator.pop(dialogContext);
                             connector.setChannel(nextIndex, 'Public', psk);
                             if (context.mounted) {
-                              ScaffoldMessenger.of(context).showSnackBar(
-                                SnackBar(
-                                  content: Text(
-                                    context.l10n.channels_publicChannelAdded,
-                                  ),
+                              showDismissibleSnackBar(
+                                context,
+                                content: Text(
+                                  context.l10n.channels_publicChannelAdded,
                                 ),
                               );
                             }
@@ -1097,15 +1082,12 @@ class _ChannelsScreenState extends State<ChannelsScreen>
                               onPressed: () async {
                                 var hashtag = hashtagController.text.trim();
                                 if (hashtag.isEmpty) {
-                                  ScaffoldMessenger.of(
-                                    dialogContext,
-                                  ).showSnackBar(
-                                    SnackBar(
-                                      content: Text(
-                                        dialogContext
-                                            .l10n
-                                            .channels_enterChannelName,
-                                      ),
+                                  showDismissibleSnackBar(
+                                    context,
+                                    content: Text(
+                                      dialogContext
+                                          .l10n
+                                          .channels_enterChannelName,
                                     ),
                                   );
                                   return;
@@ -1125,15 +1107,12 @@ class _ChannelsScreenState extends State<ChannelsScreen>
                                 } else {
                                   // Community hashtag - HMAC derivation from community secret
                                   if (selectedCommunity == null) {
-                                    ScaffoldMessenger.of(
+                                    showDismissibleSnackBar(
                                       dialogContext,
-                                    ).showSnackBar(
-                                      SnackBar(
-                                        content: Text(
-                                          dialogContext
-                                              .l10n
-                                              .community_selectCommunity,
-                                        ),
+                                      content: Text(
+                                        dialogContext
+                                            .l10n
+                                            .community_selectCommunity,
                                       ),
                                     );
                                     return;
@@ -1159,12 +1138,11 @@ class _ChannelsScreenState extends State<ChannelsScreen>
                                   psk,
                                 );
                                 if (context.mounted) {
-                                  ScaffoldMessenger.of(context).showSnackBar(
-                                    SnackBar(
-                                      content: Text(
-                                        context.l10n.channels_channelAdded(
-                                          channelName,
-                                        ),
+                                  showDismissibleSnackBar(
+                                    context,
+                                    content: Text(
+                                      context.l10n.channels_channelAdded(
+                                        channelName,
                                       ),
                                     ),
                                   );
@@ -1259,13 +1237,10 @@ class _ChannelsScreenState extends State<ChannelsScreen>
                               onPressed: () async {
                                 final name = nameController.text.trim();
                                 if (name.isEmpty) {
-                                  ScaffoldMessenger.of(
-                                    dialogContext,
-                                  ).showSnackBar(
-                                    SnackBar(
-                                      content: Text(
-                                        dialogContext.l10n.community_enterName,
-                                      ),
+                                  showDismissibleSnackBar(
+                                    context,
+                                    content: Text(
+                                      dialogContext.l10n.community_enterName,
                                     ),
                                   );
                                   return;
@@ -1301,11 +1276,10 @@ class _ChannelsScreenState extends State<ChannelsScreen>
                                 _loadCommunities();
 
                                 if (context.mounted) {
-                                  ScaffoldMessenger.of(context).showSnackBar(
-                                    SnackBar(
-                                      content: Text(
-                                        context.l10n.community_created(name),
-                                      ),
+                                  showDismissibleSnackBar(
+                                    context,
+                                    content: Text(
+                                      context.l10n.community_created(name),
                                     ),
                                   );
 
@@ -1494,10 +1468,9 @@ class _ChannelsScreenState extends State<ChannelsScreen>
                 try {
                   psk = Channel.parsePskHex(pskHex);
                 } on FormatException {
-                  ScaffoldMessenger.of(dialogContext).showSnackBar(
-                    SnackBar(
-                      content: Text(dialogContext.l10n.channels_pskMustBe32Hex),
-                    ),
+                  showDismissibleSnackBar(
+                    dialogContext,
+                    content: Text(dialogContext.l10n.channels_pskMustBe32Hex),
                   );
                   return;
                 }
@@ -1510,16 +1483,16 @@ class _ChannelsScreenState extends State<ChannelsScreen>
                     smazEnabled,
                   );
                   if (!context.mounted) return;
-                  ScaffoldMessenger.of(context).showSnackBar(
-                    SnackBar(
-                      content: Text(context.l10n.channels_channelUpdated(name)),
-                    ),
+                  showDismissibleSnackBar(
+                    context,
+                    content: Text(context.l10n.channels_channelUpdated(name)),
                   );
                 } catch (e, st) {
                   debugPrint(st.toString());
                   if (!context.mounted) return;
-                  ScaffoldMessenger.of(context).showSnackBar(
-                    SnackBar(content: Text('Failed to update channel: $e')),
+                  showDismissibleSnackBar(
+                    context,
+                    content: Text('Failed to update channel: $e'),
                   );
                 }
               },
@@ -1559,21 +1532,19 @@ class _ChannelsScreenState extends State<ChannelsScreen>
 
                 if (!context.mounted) return;
 
-                ScaffoldMessenger.of(context).showSnackBar(
-                  SnackBar(
-                    content: Text(
-                      context.l10n.channels_channelDeleted(channel.name),
-                    ),
+                showDismissibleSnackBar(
+                  context,
+                  content: Text(
+                    context.l10n.channels_channelDeleted(channel.name),
                   ),
                 );
               } catch (e, st) {
                 if (!context.mounted) return;
 
-                ScaffoldMessenger.of(context).showSnackBar(
-                  SnackBar(
-                    content: Text(
-                      context.l10n.channels_channelDeleteFailed(channel.name),
-                    ),
+                showDismissibleSnackBar(
+                  context,
+                  content: Text(
+                    context.l10n.channels_channelDeleteFailed(channel.name),
                   ),
                 );
 
@@ -1594,8 +1565,9 @@ class _ChannelsScreenState extends State<ChannelsScreen>
   void _addPublicChannel(BuildContext context, MeshCoreConnector connector) {
     final psk = Channel.parsePskHex(Channel.publicChannelPsk);
     connector.setChannel(0, 'Public', psk);
-    ScaffoldMessenger.of(context).showSnackBar(
-      SnackBar(content: Text(context.l10n.channels_publicChannelAdded)),
+    showDismissibleSnackBar(
+      context,
+      content: Text(context.l10n.channels_publicChannelAdded),
     );
   }
 
@@ -1810,12 +1782,9 @@ class _ChannelsScreenState extends State<ChannelsScreen>
               _loadCommunities();
 
               if (context.mounted) {
-                ScaffoldMessenger.of(context).showSnackBar(
-                  SnackBar(
-                    content: Text(
-                      context.l10n.community_deleted(community.name),
-                    ),
-                  ),
+                showDismissibleSnackBar(
+                  context,
+                  content: Text(context.l10n.community_deleted(community.name)),
                 );
               }
             },

lib/screens/chat_screen.dart

@@ -43,6 +43,7 @@ import '../widgets/radio_stats_entry.dart';
 import '../widgets/translated_message_content.dart';
 import '../utils/app_logger.dart';
 import '../l10n/l10n.dart';
+import '../helpers/snack_bar_builder.dart';
 import 'telemetry_screen.dart';
 
 class ChatScreen extends StatefulWidget {
@@ -633,9 +634,10 @@ class _ChatScreenState extends State<ChatScreen> {
     final now = DateTime.now();
     if (_lastTextSendAt != null &&
         now.difference(_lastTextSendAt!) < const Duration(seconds: 1)) {
-      ScaffoldMessenger.of(
+      showDismissibleSnackBar(
         context,
-      ).showSnackBar(SnackBar(content: Text(context.l10n.chat_sendCooldown)));
+        content: Text(context.l10n.chat_sendCooldown),
+      );
       return;
     }
     _lastTextSendAt = now;
@@ -671,8 +673,9 @@ class _ChatScreenState extends State<ChatScreen> {
     }
     final maxBytes = maxContactMessageBytes();
     if (utf8.encode(outgoingText).length > maxBytes) {
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text(context.l10n.chat_messageTooLong(maxBytes))),
+      showDismissibleSnackBar(
+        context,
+        content: Text(context.l10n.chat_messageTooLong(maxBytes)),
       );
       return;
     }
@@ -860,15 +863,12 @@ class _ChatScreenState extends State<ChatScreen> {
                                   _showFullPathDialog(context, path.pathBytes),
                               onTap: () async {
                                 if (path.pathBytes.isEmpty) {
-                                  ScaffoldMessenger.of(context).showSnackBar(
-                                    SnackBar(
-                                      content: Text(
-                                        context
-                                            .l10n
-                                            .chat_pathDetailsNotAvailable,
-                                      ),
-                                      duration: const Duration(seconds: 2),
+                                  showDismissibleSnackBar(
+                                    context,
+                                    content: Text(
+                                      context.l10n.chat_pathDetailsNotAvailable,
                                     ),
+                                    duration: const Duration(seconds: 2),
                                   );
                                   return;
                                 }
@@ -952,11 +952,10 @@ class _ChatScreenState extends State<ChatScreen> {
                           _resolveContact(connector),
                         );
                         if (!context.mounted) return;
-                        ScaffoldMessenger.of(context).showSnackBar(
-                          SnackBar(
-                            content: Text(context.l10n.chat_pathCleared),
-                            duration: const Duration(seconds: 2),
-                          ),
+                        showDismissibleSnackBar(
+                          context,
+                          content: Text(context.l10n.chat_pathCleared),
+                          duration: const Duration(seconds: 2),
                         );
                         Navigator.pop(context);
                       },
@@ -982,11 +981,10 @@ class _ChatScreenState extends State<ChatScreen> {
                           pathLen: -1,
                         );
                         if (!context.mounted) return;
-                        ScaffoldMessenger.of(context).showSnackBar(
-                          SnackBar(
-                            content: Text(context.l10n.chat_floodModeEnabled),
-                            duration: const Duration(seconds: 2),
-                          ),
+                        showDismissibleSnackBar(
+                          context,
+                          content: Text(context.l10n.chat_floodModeEnabled),
+                          duration: const Duration(seconds: 2),
                         );
                         Navigator.pop(context);
                       },
@@ -1020,11 +1018,10 @@ class _ChatScreenState extends State<ChatScreen> {
 
   void _showFullPathDialog(BuildContext context, List<int> pathBytes) {
     if (pathBytes.isEmpty) {
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(
-          content: Text(context.l10n.chat_pathDetailsNotAvailable),
-          duration: const Duration(seconds: 2),
-        ),
+      showDismissibleSnackBar(
+        context,
+        content: Text(context.l10n.chat_pathDetailsNotAvailable),
+        duration: const Duration(seconds: 2),
       );
       return;
     }
@@ -1137,11 +1134,10 @@ class _ChatScreenState extends State<ChatScreen> {
         : (verified
               ? context.l10n.chat_pathDeviceConfirmed
               : context.l10n.chat_pathDeviceNotConfirmed);
-    ScaffoldMessenger.of(context).showSnackBar(
-      SnackBar(
-        content: Text(context.l10n.chat_pathSetHops(hopCount, status)),
-        duration: const Duration(seconds: 3),
-      ),
+    showDismissibleSnackBar(
+      context,
+      content: Text(context.l10n.chat_pathSetHops(hopCount, status)),
+      duration: const Duration(seconds: 3),
     );
   }
 
@@ -1490,26 +1486,29 @@ class _ChatScreenState extends State<ChatScreen> {
 
   void _copyMessageText(String text) {
     Clipboard.setData(ClipboardData(text: text));
-    ScaffoldMessenger.of(
+    showDismissibleSnackBar(
       context,
-    ).showSnackBar(SnackBar(content: Text(context.l10n.chat_messageCopied)));
+      content: Text(context.l10n.chat_messageCopied),
+    );
   }
 
   Future<void> _deleteMessage(Message message) async {
     await context.read<MeshCoreConnector>().deleteMessage(message);
     if (!mounted) return;
-    ScaffoldMessenger.of(
+    showDismissibleSnackBar(
       context,
-    ).showSnackBar(SnackBar(content: Text(context.l10n.chat_messageDeleted)));
+      content: Text(context.l10n.chat_messageDeleted),
+    );
   }
 
   void _retryMessage(Message message) {
     final connector = Provider.of<MeshCoreConnector>(context, listen: false);
     // Retry using the contact's current path override setting
     connector.sendMessage(_resolveContact(connector), message.text);
-    ScaffoldMessenger.of(
+    showDismissibleSnackBar(
       context,
-    ).showSnackBar(SnackBar(content: Text(context.l10n.chat_retryingMessage)));
+      content: Text(context.l10n.chat_retryingMessage),
+    );
   }
 
   void _showEmojiPicker(Message message, Contact senderContact) {

lib/screens/community_qr_scanner_screen.dart

@@ -8,6 +8,7 @@ import '../models/community.dart';
 import '../storage/community_store.dart';
 import '../widgets/adaptive_app_bar_title.dart';
 import '../widgets/qr_scanner_widget.dart';
+import '../helpers/snack_bar_builder.dart';
 
 /// Screen for scanning community QR codes to join communities.
 ///
@@ -76,11 +77,10 @@ class _CommunityQrScannerScreenState extends State<CommunityQrScannerScreen> {
       }
     } catch (e) {
       if (context.mounted) {
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(
-            content: Text(context.l10n.community_invalidQrCode),
-            backgroundColor: Colors.red,
-          ),
+        showDismissibleSnackBar(
+          context,
+          content: Text(context.l10n.community_invalidQrCode),
+          backgroundColor: Colors.red,
         );
       }
     } finally {
@@ -93,12 +93,11 @@ class _CommunityQrScannerScreenState extends State<CommunityQrScannerScreen> {
   }
 
   void _showInvalidQrError(BuildContext context) {
-    ScaffoldMessenger.of(context).showSnackBar(
-      SnackBar(
-        content: Text(context.l10n.community_invalidQrCode),
-        backgroundColor: Colors.orange,
-        duration: const Duration(seconds: 2),
-      ),
+    showDismissibleSnackBar(
+      context,
+      content: Text(context.l10n.community_invalidQrCode),
+      backgroundColor: Colors.orange,
+      duration: const Duration(seconds: 2),
     );
   }
 
@@ -229,11 +228,10 @@ class _CommunityQrScannerScreenState extends State<CommunityQrScannerScreen> {
     }
 
     if (context.mounted) {
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(
-          content: Text(context.l10n.community_joined(community.name)),
-          backgroundColor: Colors.green,
-        ),
+      showDismissibleSnackBar(
+        context,
+        content: Text(context.l10n.community_joined(community.name)),
+        backgroundColor: Colors.green,
       );
 
       // Return to previous screen

lib/screens/contacts_screen.dart

@@ -27,6 +27,7 @@ import '../widgets/quick_switch_bar.dart';
 import '../widgets/repeater_login_dialog.dart';
 import '../widgets/room_login_dialog.dart';
 import '../widgets/unread_badge.dart';
+import '../helpers/snack_bar_builder.dart';
 import 'channels_screen.dart';
 import 'chat_screen.dart';
 import 'discovery_screen.dart';
@@ -150,9 +151,10 @@ class _ContactsScreenState extends State<ContactsScreen>
   }
 
   void _showGroupsUnavailableMessage(BuildContext context) {
-    ScaffoldMessenger.of(
+    showDismissibleSnackBar(
       context,
-    ).showSnackBar(SnackBar(content: Text(context.l10n.common_loading)));
+      content: Text(context.l10n.common_loading),
+    );
   }
 
   void _setupFrameListener() {
@@ -169,10 +171,9 @@ class _ContactsScreenState extends State<ContactsScreen>
           // Validate packet has expected minimum size (98+ bytes per protocol)
           if (advertPacket.length < 98) {
             if (mounted) {
-              ScaffoldMessenger.of(context).showSnackBar(
-                SnackBar(
-                  content: Text(context.l10n.contacts_invalidAdvertFormat),
-                ),
+              showDismissibleSnackBar(
+                context,
+                content: Text(context.l10n.contacts_invalidAdvertFormat),
               );
             }
             _pendingOperations.remove(ContactOperationType.export);
@@ -187,24 +188,23 @@ class _ContactsScreenState extends State<ContactsScreen>
           if (!mounted) return;
 
           if (_pendingOperations.contains(ContactOperationType.import)) {
-            ScaffoldMessenger.of(context).showSnackBar(
-              SnackBar(content: Text(context.l10n.contacts_contactImported)),
+            showDismissibleSnackBar(
+              context,
+              content: Text(context.l10n.contacts_contactImported),
             );
           }
 
           if (_pendingOperations.contains(ContactOperationType.zeroHopShare)) {
-            ScaffoldMessenger.of(context).showSnackBar(
-              SnackBar(
-                content: Text(context.l10n.contacts_zeroHopContactAdvertSent),
-              ),
+            showDismissibleSnackBar(
+              context,
+              content: Text(context.l10n.contacts_zeroHopContactAdvertSent),
             );
           }
 
           if (_pendingOperations.contains(ContactOperationType.export)) {
-            ScaffoldMessenger.of(context).showSnackBar(
-              SnackBar(
-                content: Text(context.l10n.contacts_contactAdvertCopied),
-              ),
+            showDismissibleSnackBar(
+              context,
+              content: Text(context.l10n.contacts_contactAdvertCopied),
             );
           }
 
@@ -216,25 +216,22 @@ class _ContactsScreenState extends State<ContactsScreen>
           if (!mounted) return;
 
           if (_pendingOperations.contains(ContactOperationType.import)) {
-            ScaffoldMessenger.of(context).showSnackBar(
-              SnackBar(
-                content: Text(context.l10n.contacts_contactImportFailed),
-              ),
+            showDismissibleSnackBar(
+              context,
+              content: Text(context.l10n.contacts_contactImportFailed),
             );
           }
 
           if (_pendingOperations.contains(ContactOperationType.zeroHopShare)) {
-            ScaffoldMessenger.of(context).showSnackBar(
-              SnackBar(
-                content: Text(context.l10n.contacts_zeroHopContactAdvertFailed),
-              ),
+            showDismissibleSnackBar(
+              context,
+              content: Text(context.l10n.contacts_zeroHopContactAdvertFailed),
             );
           }
           if (_pendingOperations.contains(ContactOperationType.export)) {
-            ScaffoldMessenger.of(context).showSnackBar(
-              SnackBar(
-                content: Text(context.l10n.contacts_contactAdvertCopyFailed),
-              ),
+            showDismissibleSnackBar(
+              context,
+              content: Text(context.l10n.contacts_contactAdvertCopyFailed),
             );
           }
 
@@ -271,8 +268,9 @@ class _ContactsScreenState extends State<ContactsScreen>
     final clipboardData = await Clipboard.getData('text/plain');
     if (clipboardData == null || clipboardData.text == null) {
       if (mounted) {
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(content: Text(context.l10n.contacts_clipboardEmpty)),
+        showDismissibleSnackBar(
+          context,
+          content: Text(context.l10n.contacts_clipboardEmpty),
         );
       }
       return;
@@ -280,8 +278,9 @@ class _ContactsScreenState extends State<ContactsScreen>
     final text = clipboardData.text!.trim();
     if (!text.startsWith('meshcore://')) {
       if (mounted) {
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(content: Text(context.l10n.contacts_invalidAdvertFormat)),
+        showDismissibleSnackBar(
+          context,
+          content: Text(context.l10n.contacts_invalidAdvertFormat),
         );
       }
       return;
@@ -294,8 +293,9 @@ class _ContactsScreenState extends State<ContactsScreen>
       connector.importContact(importContactFrame);
     } catch (e) {
       if (mounted) {
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(content: Text(context.l10n.contacts_invalidAdvertFormat)),
+        showDismissibleSnackBar(
+          context,
+          content: Text(context.l10n.contacts_invalidAdvertFormat),
         );
       }
     }
@@ -330,10 +330,9 @@ class _ContactsScreenState extends State<ContactsScreen>
                   ),
                   onTap: () => {
                     connector.sendSelfAdvert(flood: false),
-                    ScaffoldMessenger.of(context).showSnackBar(
-                      SnackBar(
-                        content: Text(context.l10n.settings_advertisementSent),
-                      ),
+                    showDismissibleSnackBar(
+                      context,
+                      content: Text(context.l10n.settings_advertisementSent),
                     ),
                   },
                 ),
@@ -347,10 +346,9 @@ class _ContactsScreenState extends State<ContactsScreen>
                   ),
                   onTap: () => {
                     connector.sendSelfAdvert(flood: true),
-                    ScaffoldMessenger.of(context).showSnackBar(
-                      SnackBar(
-                        content: Text(context.l10n.settings_advertisementSent),
-                      ),
+                    showDismissibleSnackBar(
+                      context,
+                      content: Text(context.l10n.settings_advertisementSent),
                     ),
                   },
                 ),
@@ -1146,19 +1144,17 @@ class _ContactsScreenState extends State<ContactsScreen>
                 onPressed: () async {
                   final name = nameController.text.trim();
                   if (name.isEmpty) {
-                    ScaffoldMessenger.of(context).showSnackBar(
-                      SnackBar(
-                        content: Text(context.l10n.contacts_groupNameRequired),
-                      ),
+                    showDismissibleSnackBar(
+                      context,
+                      content: Text(context.l10n.contacts_groupNameRequired),
                     );
                     return;
                   }
                   if (name.toLowerCase() ==
                       contactsAllGroupsValue.toLowerCase()) {
-                    ScaffoldMessenger.of(context).showSnackBar(
-                      SnackBar(
-                        content: Text(context.l10n.contacts_groupNameReserved),
-                      ),
+                    showDismissibleSnackBar(
+                      context,
+                      content: Text(context.l10n.contacts_groupNameReserved),
                     );
                     return;
                   }
@@ -1167,11 +1163,10 @@ class _ContactsScreenState extends State<ContactsScreen>
                     return g.name.toLowerCase() == name.toLowerCase();
                   });
                   if (exists) {
-                    ScaffoldMessenger.of(context).showSnackBar(
-                      SnackBar(
-                        content: Text(
-                          context.l10n.contacts_groupAlreadyExists(name),
-                        ),
+                    showDismissibleSnackBar(
+                      context,
+                      content: Text(
+                        context.l10n.contacts_groupAlreadyExists(name),
                       ),
                     );
                     return;

lib/screens/discovery_screen.dart

@@ -12,6 +12,7 @@ import '../utils/contact_search.dart';
 import '../utils/platform_info.dart';
 import '../widgets/app_bar.dart';
 import '../widgets/list_filter_widget.dart';
+import '../helpers/snack_bar_builder.dart';
 
 enum DiscoverySortOption { lastSeen, name, type }
 
@@ -234,8 +235,9 @@ class _DiscoveryScreenState extends State<DiscoveryScreen> {
         final hexString = pubKeyToHex(contact.rawPacket!);
         Clipboard.setData(ClipboardData(text: "meshcore://$hexString"));
         if (!mounted) return;
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(content: Text(context.l10n.contacts_contactAdvertCopied)),
+        showDismissibleSnackBar(
+          context,
+          content: Text(context.l10n.contacts_contactAdvertCopied),
         );
         break;
       case 'delete_contact':

lib/screens/map_cache_screen.dart

@@ -8,6 +8,7 @@ import '../l10n/l10n.dart';
 import '../services/app_settings_service.dart';
 import '../services/map_tile_cache_service.dart';
 import '../widgets/adaptive_app_bar_title.dart';
+import '../helpers/snack_bar_builder.dart';
 
 class MapCacheScreen extends StatefulWidget {
   const MapCacheScreen({super.key});
@@ -112,15 +113,17 @@ class _MapCacheScreenState extends State<MapCacheScreen> {
   Future<void> _startDownload() async {
     final bounds = _selectedBounds;
     if (bounds == null) {
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text(context.l10n.mapCache_selectAreaFirst)),
+      showDismissibleSnackBar(
+        context,
+        content: Text(context.l10n.mapCache_selectAreaFirst),
       );
       return;
     }
 
     if (_estimatedTiles == 0) {
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text(context.l10n.mapCache_noTilesToDownload)),
+      showDismissibleSnackBar(
+        context,
+        content: Text(context.l10n.mapCache_noTilesToDownload),
       );
       return;
     }
@@ -182,9 +185,7 @@ class _MapCacheScreenState extends State<MapCacheScreen> {
             result.failed,
           )
         : context.l10n.mapCache_cachedTiles(result.downloaded);
-    ScaffoldMessenger.of(
-      context,
-    ).showSnackBar(SnackBar(content: Text(message)));
+    showDismissibleSnackBar(context, content: Text(message));
   }
 
   Future<void> _clearCache() async {
@@ -210,8 +211,9 @@ class _MapCacheScreenState extends State<MapCacheScreen> {
     final cacheService = context.read<MapTileCacheService>();
     await cacheService.clearCache();
     if (!mounted) return;
-    ScaffoldMessenger.of(context).showSnackBar(
-      SnackBar(content: Text(context.l10n.mapCache_offlineCacheCleared)),
+    showDismissibleSnackBar(
+      context,
+      content: Text(context.l10n.mapCache_offlineCacheCleared),
     );
   }
 

lib/screens/map_screen.dart

@@ -29,6 +29,7 @@ import 'chat_screen.dart';
 import 'contacts_screen.dart';
 import '../widgets/repeater_login_dialog.dart';
 import '../widgets/room_login_dialog.dart';
+import '../helpers/snack_bar_builder.dart';
 import 'repeater_hub_screen.dart';
 import 'settings_screen.dart';
 import 'line_of_sight_map_screen.dart';
@@ -1659,7 +1660,10 @@ class _MapScreenState extends State<MapScreen> {
                 );
                 await connector.refreshDeviceInfo();
                 if (!mounted) return;
-                messenger.showSnackBar(SnackBar(content: Text(successMsg)));
+                showDismissibleSnackBar(
+                  messenger.context,
+                  content: Text(successMsg),
+                );
               },
             ),
             ListTile(
@@ -1681,8 +1685,9 @@ class _MapScreenState extends State<MapScreen> {
     required String flags,
   }) async {
     if (!connector.isConnected) {
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text(context.l10n.map_connectToShareMarkers)),
+      showDismissibleSnackBar(
+        context,
+        content: Text(context.l10n.map_connectToShareMarkers),
       );
       return;
     }
@@ -2271,8 +2276,9 @@ class _MapScreenState extends State<MapScreen> {
                           _points.clear();
                           _polylines.clear();
                         });
-                        ScaffoldMessenger.of(context).showSnackBar(
-                          SnackBar(content: Text(l10n.map_pathTraceCancelled)),
+                        showDismissibleSnackBar(
+                          context,
+                          content: Text(l10n.map_pathTraceCancelled),
                         );
                       },
                       tooltip: l10n.common_cancel,

lib/screens/neighbors_screen.dart

@@ -11,6 +11,7 @@ import '../connector/meshcore_protocol.dart';
 import '../services/repeater_command_service.dart';
 import '../widgets/path_management_dialog.dart';
 import '../widgets/snr_indicator.dart';
+import '../helpers/snack_bar_builder.dart';
 
 class NeighborsScreen extends StatefulWidget {
   final Contact repeater;
@@ -163,11 +164,10 @@ class _NeighborsScreenState extends State<NeighborsScreen> {
         _neighborCount = neighborCount;
       });
 
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(
-          content: Text(context.l10n.neighbors_receivedData),
-          backgroundColor: Colors.green,
-        ),
+      showDismissibleSnackBar(
+        context,
+        content: Text(context.l10n.neighbors_receivedData),
+        backgroundColor: Colors.green,
       );
       _statusTimeout?.cancel();
       if (!mounted) return;
@@ -224,11 +224,10 @@ class _NeighborsScreenState extends State<NeighborsScreen> {
           _isLoading = false;
           _isLoaded = false;
         });
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(
-            content: Text(context.l10n.neighbors_requestTimedOut),
-            backgroundColor: Colors.red,
-          ),
+        showDismissibleSnackBar(
+          context,
+          content: Text(context.l10n.neighbors_requestTimedOut),
+          backgroundColor: Colors.red,
         );
         _recordStatusResult(false);
       });
@@ -239,11 +238,10 @@ class _NeighborsScreenState extends State<NeighborsScreen> {
           _isLoaded = false;
         });
 
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(
-            content: Text(context.l10n.neighbors_errorLoading(e.toString())),
-            backgroundColor: Colors.red,
-          ),
+        showDismissibleSnackBar(
+          context,
+          content: Text(context.l10n.neighbors_errorLoading(e.toString())),
+          backgroundColor: Colors.red,
         );
       }
     }

lib/screens/repeater_cli_screen.dart

@@ -9,6 +9,7 @@ import '../connector/meshcore_protocol.dart';
 import '../widgets/debug_frame_viewer.dart';
 import '../services/repeater_command_service.dart';
 import '../widgets/path_management_dialog.dart';
+import '../helpers/snack_bar_builder.dart';
 
 class RepeaterCliScreen extends StatefulWidget {
   final Contact repeater;
@@ -336,8 +337,9 @@ class _RepeaterCliScreenState extends State<RepeaterCliScreen> {
               if (_commandController.text.trim().isNotEmpty) {
                 _sendCommand(showDebug: true);
               } else {
-                ScaffoldMessenger.of(context).showSnackBar(
-                  SnackBar(content: Text(l10n.repeater_enterCommandFirst)),
+                showDismissibleSnackBar(
+                  context,
+                  content: Text(l10n.repeater_enterCommandFirst),
                 );
               }
             },

lib/screens/repeater_settings_screen.dart

@@ -10,6 +10,7 @@ import '../services/app_debug_log_service.dart';
 import '../services/repeater_command_service.dart';
 import '../services/storage_service.dart';
 import '../widgets/path_management_dialog.dart';
+import '../helpers/snack_bar_builder.dart';
 
 class RepeaterSettingsScreen extends StatefulWidget {
   final Contact repeater;
@@ -468,18 +469,16 @@ class _RepeaterSettingsScreenState extends State<RepeaterSettingsScreen> {
 
     if (mounted) {
       if (successCount > 0) {
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(
-            content: Text(l10n.repeater_refreshed(label)),
-            backgroundColor: Colors.green,
-          ),
+        showDismissibleSnackBar(
+          context,
+          content: Text(l10n.repeater_refreshed(label)),
+          backgroundColor: Colors.green,
         );
       } else {
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(
-            content: Text(l10n.repeater_errorRefreshing(label)),
-            backgroundColor: Colors.red,
-          ),
+        showDismissibleSnackBar(
+          context,
+          content: Text(l10n.repeater_errorRefreshing(label)),
+          backgroundColor: Colors.red,
         );
       }
 
@@ -666,11 +665,10 @@ class _RepeaterSettingsScreenState extends State<RepeaterSettingsScreen> {
       });
 
       if (mounted) {
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(
-            content: Text(context.l10n.repeater_settingsSaved),
-            backgroundColor: Colors.green,
-          ),
+        showDismissibleSnackBar(
+          context,
+          content: Text(context.l10n.repeater_settingsSaved),
+          backgroundColor: Colors.green,
         );
       }
     } catch (e) {
@@ -679,13 +677,12 @@ class _RepeaterSettingsScreenState extends State<RepeaterSettingsScreen> {
       });
 
       if (mounted) {
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(
-            content: Text(
-              context.l10n.repeater_errorSavingSettings(e.toString()),
-            ),
-            backgroundColor: Colors.red,
+        showDismissibleSnackBar(
+          context,
+          content: Text(
+            context.l10n.repeater_errorSavingSettings(e.toString()),
           ),
+          backgroundColor: Colors.red,
         );
       }
     }
@@ -1429,9 +1426,10 @@ class _RepeaterSettingsScreenState extends State<RepeaterSettingsScreen> {
 
     if (command == 'erase') {
       if (mounted) {
-        ScaffoldMessenger.of(
+        showDismissibleSnackBar(
           context,
-        ).showSnackBar(SnackBar(content: Text(l10n.repeater_eraseSerialOnly)));
+          content: Text(l10n.repeater_eraseSerialOnly),
+        );
       }
       return;
     }
@@ -1453,17 +1451,17 @@ class _RepeaterSettingsScreenState extends State<RepeaterSettingsScreen> {
       await connector.sendFrame(frame);
 
       if (mounted) {
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(content: Text(l10n.repeater_commandSent(command))),
+        showDismissibleSnackBar(
+          context,
+          content: Text(l10n.repeater_commandSent(command)),
         );
       }
     } catch (e) {
       if (mounted) {
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(
-            content: Text(l10n.repeater_errorSendingCommand(e.toString())),
-            backgroundColor: Colors.red,
-          ),
+        showDismissibleSnackBar(
+          context,
+          content: Text(l10n.repeater_errorSendingCommand(e.toString())),
+          backgroundColor: Colors.red,
         );
       }
     }

lib/screens/repeater_status_screen.dart

@@ -12,6 +12,7 @@ import '../services/app_settings_service.dart';
 import '../services/repeater_command_service.dart';
 import '../utils/battery_utils.dart';
 import '../widgets/path_management_dialog.dart';
+import '../helpers/snack_bar_builder.dart';
 
 class RepeaterStatusScreen extends StatefulWidget {
   final Contact repeater;
@@ -309,11 +310,10 @@ class _RepeaterStatusScreenState extends State<RepeaterStatusScreen> {
         setState(() {
           _isLoading = false;
         });
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(
-            content: Text(context.l10n.repeater_statusRequestTimeout),
-            backgroundColor: Colors.red,
-          ),
+        showDismissibleSnackBar(
+          context,
+          content: Text(context.l10n.repeater_statusRequestTimeout),
+          backgroundColor: Colors.red,
         );
         _recordStatusResult(false);
       });
@@ -323,13 +323,10 @@ class _RepeaterStatusScreenState extends State<RepeaterStatusScreen> {
           _isLoading = false;
         });
 
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(
-            content: Text(
-              context.l10n.repeater_errorLoadingStatus(e.toString()),
-            ),
-            backgroundColor: Colors.red,
-          ),
+        showDismissibleSnackBar(
+          context,
+          content: Text(context.l10n.repeater_errorLoadingStatus(e.toString())),
+          backgroundColor: Colors.red,
         );
       }
       _recordStatusResult(false);

lib/screens/scanner_screen.dart

@@ -10,6 +10,7 @@ import '../services/linux_ble_error_classifier.dart';
 import '../utils/app_logger.dart';
 import '../widgets/adaptive_app_bar_title.dart';
 import '../widgets/device_tile.dart';
+import '../helpers/snack_bar_builder.dart';
 import 'contacts_screen.dart';
 import 'tcp_screen.dart';
 import 'usb_screen.dart';
@@ -317,11 +318,10 @@ class _ScannerScreenState extends State<ScannerScreen> {
         return;
       }
       if (context.mounted) {
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(
-            content: Text(context.l10n.scanner_connectionFailed(e.toString())),
-            backgroundColor: Colors.red,
-          ),
+        showDismissibleSnackBar(
+          context,
+          content: Text(context.l10n.scanner_connectionFailed(e.toString())),
+          backgroundColor: Colors.red,
         );
       }
     }

lib/screens/settings_screen.dart

@@ -11,6 +11,7 @@ import '../l10n/l10n.dart';
 import '../models/radio_settings.dart';
 import '../services/app_debug_log_service.dart';
 import '../widgets/app_bar.dart';
+import '../helpers/snack_bar_builder.dart';
 import 'app_settings_screen.dart';
 import 'app_debug_log_screen.dart';
 import 'ble_debug_log_screen.dart';
@@ -513,8 +514,9 @@ class _SettingsScreenState extends State<SettingsScreen> {
               await connector.setNodeName(controller.text);
               await connector.refreshDeviceInfo();
               if (!context.mounted) return;
-              ScaffoldMessenger.of(context).showSnackBar(
-                SnackBar(content: Text(l10n.settings_nodeNameUpdated)),
+              showDismissibleSnackBar(
+                context,
+                content: Text(l10n.settings_nodeNameUpdated),
               );
             },
             child: Text(l10n.common_save),
@@ -628,10 +630,9 @@ class _SettingsScreenState extends State<SettingsScreen> {
                   final interval = int.tryParse(intervalText);
                   if (interval == null || interval < 60 || interval >= 86400) {
                     if (!context.mounted) return;
-                    ScaffoldMessenger.of(context).showSnackBar(
-                      SnackBar(
-                        content: Text(l10n.settings_locationIntervalInvalid),
-                      ),
+                    showDismissibleSnackBar(
+                      context,
+                      content: Text(l10n.settings_locationIntervalInvalid),
                     );
                     return;
                   }
@@ -639,8 +640,9 @@ class _SettingsScreenState extends State<SettingsScreen> {
                   await connector.setCustomVar("gps_interval:$interval");
                   await connector.refreshDeviceInfo();
                   if (!context.mounted) return;
-                  ScaffoldMessenger.of(context).showSnackBar(
-                    SnackBar(content: Text(l10n.settings_locationUpdated)),
+                  showDismissibleSnackBar(
+                    context,
+                    content: Text(l10n.settings_locationUpdated),
                   );
                 }
 
@@ -660,15 +662,17 @@ class _SettingsScreenState extends State<SettingsScreen> {
                     : currentLon;
                 if (lat == null || lon == null) {
                   if (!context.mounted) return;
-                  ScaffoldMessenger.of(context).showSnackBar(
-                    SnackBar(content: Text(l10n.settings_locationBothRequired)),
+                  showDismissibleSnackBar(
+                    context,
+                    content: Text(l10n.settings_locationBothRequired),
                   );
                   return;
                 }
                 if (lat < -90 || lat > 90 || lon < -180 || lon > 180) {
                   if (!context.mounted) return;
-                  ScaffoldMessenger.of(context).showSnackBar(
-                    SnackBar(content: Text(l10n.settings_locationInvalid)),
+                  showDismissibleSnackBar(
+                    context,
+                    content: Text(l10n.settings_locationInvalid),
                   );
                   return;
                 }
@@ -676,8 +680,9 @@ class _SettingsScreenState extends State<SettingsScreen> {
                 await connector.setNodeLocation(lat: lat, lon: lon);
                 await connector.refreshDeviceInfo();
                 if (!context.mounted) return;
-                ScaffoldMessenger.of(context).showSnackBar(
-                  SnackBar(content: Text(l10n.settings_locationUpdated)),
+                showDismissibleSnackBar(
+                  context,
+                  content: Text(l10n.settings_locationUpdated),
                 );
               },
               child: Text(l10n.common_save),
@@ -691,9 +696,10 @@ class _SettingsScreenState extends State<SettingsScreen> {
   void _syncTime(BuildContext context, MeshCoreConnector connector) {
     final l10n = context.l10n;
     connector.syncTime();
-    ScaffoldMessenger.of(
+    showDismissibleSnackBar(
       context,
-    ).showSnackBar(SnackBar(content: Text(l10n.settings_timeSynchronized)));
+      content: Text(l10n.settings_timeSynchronized),
+    );
   }
 
   void _confirmReboot(BuildContext context, MeshCoreConnector connector) {
@@ -758,23 +764,27 @@ class _SettingsScreenState extends State<SettingsScreen> {
     if (!mounted) return;
     switch (result) {
       case gpxExportSuccess:
-        ScaffoldMessenger.of(
+        showDismissibleSnackBar(
           context,
-        ).showSnackBar(SnackBar(content: Text(l10n.settings_gpxExportSuccess)));
+          content: Text(l10n.settings_gpxExportSuccess),
+        );
       case gpxExportNoContacts:
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(content: Text(l10n.settings_gpxExportNoContacts)),
+        showDismissibleSnackBar(
+          context,
+          content: Text(l10n.settings_gpxExportNoContacts),
         );
         break;
       case gpxExportNotAvailable:
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(content: Text(l10n.settings_gpxExportNotAvailable)),
+        showDismissibleSnackBar(
+          context,
+          content: Text(l10n.settings_gpxExportNotAvailable),
         );
         break;
       case gpxExportFailed:
-        ScaffoldMessenger.of(
+        showDismissibleSnackBar(
           context,
-        ).showSnackBar(SnackBar(content: Text(l10n.settings_gpxExportError)));
+          content: Text(l10n.settings_gpxExportError),
+        );
         break;
     }
   }
@@ -1077,8 +1087,9 @@ void _privacySettings(BuildContext context, MeshCoreConnector connector) {
               );
               await connector.refreshDeviceInfo();
               if (!context.mounted) return;
-              ScaffoldMessenger.of(context).showSnackBar(
-                SnackBar(content: Text(l10n.settings_telemetryModeUpdated)),
+              showDismissibleSnackBar(
+                context,
+                content: Text(l10n.settings_telemetryModeUpdated),
               );
             },
             child: Text(l10n.common_save),
@@ -1410,18 +1421,18 @@ class _RadioSettingsDialogState extends State<_RadioSettingsDialog> {
     final txPower = int.tryParse(_txPowerController.text);
 
     if (freqMHz == null || freqMHz < 300 || freqMHz > 2500) {
-      ScaffoldMessenger.of(
+      showDismissibleSnackBar(
         context,
-      ).showSnackBar(SnackBar(content: Text(l10n.settings_frequencyInvalid)));
+        content: Text(l10n.settings_frequencyInvalid),
+      );
       return;
     }
 
     final maxTxPower = widget.connector.maxTxPower ?? 22;
     if (txPower == null || txPower < 0 || txPower > maxTxPower) {
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(
-          content: Text('${l10n.settings_txPowerInvalid} (0-$maxTxPower dBm)'),
-        ),
+      showDismissibleSnackBar(
+        context,
+        content: Text('${l10n.settings_txPowerInvalid} (0-$maxTxPower dBm)'),
       );
       return;
     }
@@ -1441,8 +1452,9 @@ class _RadioSettingsDialogState extends State<_RadioSettingsDialog> {
     if (knownRepeat) {
       const validRepeatFreqsKHz = {433000, 869000, 918000};
       if (_clientRepeat && !validRepeatFreqsKHz.contains(freqHz)) {
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(content: Text(l10n.settings_clientRepeatFreqWarning)),
+        showDismissibleSnackBar(
+          context,
+          content: Text(l10n.settings_clientRepeatFreqWarning),
         );
         return;
       }
@@ -1472,14 +1484,16 @@ class _RadioSettingsDialogState extends State<_RadioSettingsDialog> {
 
       if (!mounted) return;
       _logRadioSettingsState('Radio settings saved successfully');
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text(l10n.settings_radioSettingsUpdated)),
+      showDismissibleSnackBar(
+        context,
+        content: Text(l10n.settings_radioSettingsUpdated),
       );
     } catch (e) {
       _appLog.warn('Radio settings save failed: $e', tag: 'RadioSettings');
       if (!mounted) return;
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text(l10n.settings_error(e.toString()))),
+      showDismissibleSnackBar(
+        context,
+        content: Text(l10n.settings_error(e.toString())),
       );
     }
     Navigator.pop(context);

lib/screens/tcp_screen.dart

@@ -8,6 +8,7 @@ import '../l10n/l10n.dart';
 import '../services/app_settings_service.dart';
 import '../utils/platform_info.dart';
 import '../widgets/adaptive_app_bar_title.dart';
+import '../helpers/snack_bar_builder.dart';
 import 'contacts_screen.dart';
 import 'usb_screen.dart';
 
@@ -270,8 +271,10 @@ class _TcpScreenState extends State<TcpScreen> {
 
   void _showError(String message) {
     if (!mounted) return;
-    ScaffoldMessenger.of(context).showSnackBar(
-      SnackBar(content: Text(message), backgroundColor: Colors.red),
+    showDismissibleSnackBar(
+      context,
+      content: Text(message),
+      backgroundColor: Colors.red,
     );
   }
 

lib/screens/telemetry_screen.dart

@@ -14,6 +14,7 @@ import '../utils/app_logger.dart';
 import '../widgets/path_management_dialog.dart';
 import '../helpers/cayenne_lpp.dart';
 import '../utils/battery_utils.dart';
+import '../helpers/snack_bar_builder.dart';
 
 class TelemetryScreen extends StatefulWidget {
   final Contact contact;
@@ -86,11 +87,10 @@ class _TelemetryScreenState extends State<TelemetryScreen> {
               _isLoading = false;
               _isLoaded = false;
             });
-            ScaffoldMessenger.of(context).showSnackBar(
-              SnackBar(
-                content: Text(context.l10n.telemetry_requestTimeout),
-                backgroundColor: Colors.red,
-              ),
+            showDismissibleSnackBar(
+              context,
+              content: Text(context.l10n.telemetry_requestTimeout),
+              backgroundColor: Colors.red,
             );
             _recordTelemetryResult(false);
           });
@@ -137,11 +137,10 @@ class _TelemetryScreenState extends State<TelemetryScreen> {
       _parsedTelemetry = parsedTelemetry;
     });
 
-    ScaffoldMessenger.of(context).showSnackBar(
-      SnackBar(
-        content: Text(context.l10n.telemetry_receivedData),
-        backgroundColor: Colors.green,
-      ),
+    showDismissibleSnackBar(
+      context,
+      content: Text(context.l10n.telemetry_receivedData),
+      backgroundColor: Colors.green,
     );
     _statusTimeout?.cancel();
     if (!mounted) return;
@@ -182,11 +181,10 @@ class _TelemetryScreenState extends State<TelemetryScreen> {
           _isLoaded = false;
         });
 
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(
-            content: Text(context.l10n.telemetry_errorLoading(e.toString())),
-            backgroundColor: Colors.red,
-          ),
+        showDismissibleSnackBar(
+          context,
+          content: Text(context.l10n.telemetry_errorLoading(e.toString())),
+          backgroundColor: Colors.red,
         );
       }
     }

lib/screens/usb_screen.dart

@@ -10,6 +10,7 @@ import '../utils/app_logger.dart';
 import '../utils/platform_info.dart';
 import '../utils/usb_port_labels.dart';
 import '../widgets/adaptive_app_bar_title.dart';
+import '../helpers/snack_bar_builder.dart';
 import 'contacts_screen.dart';
 import 'scanner_screen.dart';
 import 'tcp_screen.dart';
@@ -383,11 +384,10 @@ class _UsbScreenState extends State<UsbScreen> {
 
   void _showError(Object error) {
     if (!mounted) return;
-    ScaffoldMessenger.of(context).showSnackBar(
-      SnackBar(
-        content: Text(_friendlyErrorMessage(error)),
-        backgroundColor: Colors.red,
-      ),
+    showDismissibleSnackBar(
+      context,
+      content: Text(_friendlyErrorMessage(error)),
+      backgroundColor: Colors.red,
     );
   }
 

lib/widgets/path_management_dialog.dart

@@ -11,6 +11,7 @@ import '../l10n/l10n.dart';
 import '../models/contact.dart';
 import '../helpers/path_helper.dart';
 import '../services/path_history_service.dart';
+import '../helpers/snack_bar_builder.dart';
 import 'path_selection_dialog.dart';
 
 class PathManagementDialog {
@@ -65,11 +66,10 @@ class _PathManagementDialogState extends State<_PathManagementDialog> {
   void _showFullPathDialog(BuildContext context, List<int> pathBytes) {
     final l10n = context.l10n;
     if (pathBytes.isEmpty) {
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(
-          content: Text(l10n.chat_pathDetailsNotAvailable),
-          duration: const Duration(seconds: 2),
-        ),
+      showDismissibleSnackBar(
+        context,
+        content: Text(l10n.chat_pathDetailsNotAvailable),
+        duration: const Duration(seconds: 2),
       );
       return;
     }
@@ -159,11 +159,10 @@ class _PathManagementDialogState extends State<_PathManagementDialog> {
       );
 
       if (!context.mounted) return;
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(
-          content: Text(l10n.chat_hopsCount(result.length)),
-          duration: const Duration(seconds: 2),
-        ),
+      showDismissibleSnackBar(
+        context,
+        content: Text(l10n.chat_hopsCount(result.length)),
+        duration: const Duration(seconds: 2),
       );
     }
   }
@@ -337,13 +336,12 @@ class _PathManagementDialogState extends State<_PathManagementDialog> {
                               _showFullPathDialog(context, path.pathBytes),
                           onTap: () async {
                             if (path.pathBytes.isEmpty) {
-                              ScaffoldMessenger.of(context).showSnackBar(
-                                SnackBar(
-                                  content: Text(
-                                    l10n.chat_pathDetailsNotAvailable,
-                                  ),
-                                  duration: const Duration(seconds: 2),
+                              showDismissibleSnackBar(
+                                context,
+                                content: Text(
+                                  l10n.chat_pathDetailsNotAvailable,
                                 ),
+                                duration: const Duration(seconds: 2),
                               );
                               return;
                             }
@@ -361,13 +359,12 @@ class _PathManagementDialogState extends State<_PathManagementDialog> {
 
                             if (!context.mounted) return;
                             Navigator.pop(context);
-                            ScaffoldMessenger.of(context).showSnackBar(
-                              SnackBar(
-                                content: Text(
-                                  l10n.path_usingHopsPath(path.hopCount),
-                                ),
-                                duration: const Duration(seconds: 2),
+                            showDismissibleSnackBar(
+                              context,
+                              content: Text(
+                                l10n.path_usingHopsPath(path.hopCount),
                               ),
+                              duration: const Duration(seconds: 2),
                             );
                           },
                         ),
@@ -459,11 +456,10 @@ class _PathManagementDialogState extends State<_PathManagementDialog> {
                   onTap: () async {
                     await connector.clearContactPath(currentContact);
                     if (!context.mounted) return;
-                    ScaffoldMessenger.of(context).showSnackBar(
-                      SnackBar(
-                        content: Text(l10n.chat_pathCleared),
-                        duration: const Duration(seconds: 2),
-                      ),
+                    showDismissibleSnackBar(
+                      context,
+                      content: Text(l10n.chat_pathCleared),
+                      duration: const Duration(seconds: 2),
                     );
                     Navigator.pop(context);
                   },
@@ -489,11 +485,10 @@ class _PathManagementDialogState extends State<_PathManagementDialog> {
                       pathLen: -1,
                     );
                     if (!context.mounted) return;
-                    ScaffoldMessenger.of(context).showSnackBar(
-                      SnackBar(
-                        content: Text(l10n.chat_floodModeEnabled),
-                        duration: const Duration(seconds: 2),
-                      ),
+                    showDismissibleSnackBar(
+                      context,
+                      content: Text(l10n.chat_floodModeEnabled),
+                      duration: const Duration(seconds: 2),
                     );
                     Navigator.pop(context);
                   },

lib/widgets/path_selection_dialog.dart

@@ -3,6 +3,7 @@ import 'package:flutter/material.dart';
 import 'package:meshcore_open/connector/meshcore_protocol.dart';
 import '../l10n/l10n.dart';
 import '../models/contact.dart';
+import '../helpers/snack_bar_builder.dart';
 
 class PathSelectionDialog extends StatefulWidget {
   final List<Contact> availableContacts;
@@ -138,26 +139,22 @@ class _PathSelectionDialogState extends State<PathSelectionDialog> {
 
     // Show error for invalid prefixes
     if (invalidPrefixes.isNotEmpty) {
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(
-          content: Text(
-            l10n.path_invalidHexPrefixes(invalidPrefixes.join(", ")),
-          ),
-          duration: const Duration(seconds: 3),
-          backgroundColor: Colors.red,
-        ),
+      showDismissibleSnackBar(
+        context,
+        content: Text(l10n.path_invalidHexPrefixes(invalidPrefixes.join(", "))),
+        duration: const Duration(seconds: 3),
+        backgroundColor: Colors.red,
       );
       return;
     }
 
     // Check max path length (64 hops)
     if (pathBytesList.length > 64) {
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(
-          content: Text(l10n.path_tooLong),
-          duration: const Duration(seconds: 3),
-          backgroundColor: Colors.red,
-        ),
+      showDismissibleSnackBar(
+        context,
+        content: Text(l10n.path_tooLong),
+        duration: const Duration(seconds: 3),
+        backgroundColor: Colors.red,
       );
       return;
     }

lib/widgets/room_login_dialog.dart

@@ -10,6 +10,7 @@ import '../services/storage_service.dart';
 import '../connector/meshcore_connector.dart';
 import '../connector/meshcore_protocol.dart';
 import '../utils/app_logger.dart';
+import '../helpers/snack_bar_builder.dart';
 import 'path_management_dialog.dart';
 
 class RoomLoginDialog extends StatefulWidget {
@@ -175,11 +176,10 @@ class _RoomLoginDialogState extends State<RoomLoginDialog> {
         setState(() {
           _isLoggingIn = false;
         });
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(
-            content: Text(context.l10n.login_failed(e.toString())),
-            backgroundColor: Colors.red,
-          ),
+        showDismissibleSnackBar(
+          context,
+          content: Text(context.l10n.login_failed(e.toString())),
+          backgroundColor: Colors.red,
         );
       }
     }