resolved codex suggestion. Added smaz compresson aware length limitter. on Location share ask for confirmation on public channel and preselect label input field for easier editing.

lib/helpers/utf8_length_limiter.dart

@@ -2,10 +2,32 @@ import 'dart:convert';
 
 import 'package:flutter/services.dart';
 
+String truncateToUtf8Bytes(String text, int maxBytes) {
+  if (maxBytes <= 0) return '';
+
+  final buffer = StringBuffer();
+  var usedBytes = 0;
+  for (final rune in text.runes) {
+    final character = String.fromCharCode(rune);
+    final characterBytes = utf8.encode(character).length;
+    if (usedBytes + characterBytes > maxBytes) break;
+    buffer.write(character);
+    usedBytes += characterBytes;
+  }
+
+  return buffer.toString();
+}
+
 class Utf8LengthLimitingTextInputFormatter extends TextInputFormatter {
   final int maxBytes;
+  final String Function(String)? encoder;
 
-  const Utf8LengthLimitingTextInputFormatter(this.maxBytes);
+  const Utf8LengthLimitingTextInputFormatter(this.maxBytes, {this.encoder});
+
+  int _effectiveByteLength(String text) {
+    final effective = encoder != null ? encoder!(text) : text;
+    return utf8.encode(effective).length;
+  }
 
   @override
   TextEditingValue formatEditUpdate(
@@ -13,10 +35,9 @@ class Utf8LengthLimitingTextInputFormatter extends TextInputFormatter {
     TextEditingValue newValue,
   ) {
     if (maxBytes <= 0) return oldValue;
-    final bytes = utf8.encode(newValue.text);
-    if (bytes.length <= maxBytes) return newValue;
+    if (_effectiveByteLength(newValue.text) <= maxBytes) return newValue;
 
-    final truncated = _truncateToMaxBytes(newValue.text, maxBytes);
+    final truncated = _truncate(newValue.text);
     return TextEditingValue(
       text: truncated,
       selection: TextSelection.collapsed(offset: truncated.length),
@@ -24,16 +45,13 @@ class Utf8LengthLimitingTextInputFormatter extends TextInputFormatter {
     );
   }
 
-  String _truncateToMaxBytes(String text, int limit) {
-    final buffer = StringBuffer();
-    var used = 0;
-    for (final rune in text.runes) {
-      final char = String.fromCharCode(rune);
-      final charBytes = utf8.encode(char).length;
-      if (used + charBytes > limit) break;
-      buffer.write(char);
-      used += charBytes;
+  String _truncate(String text) {
+    if (encoder == null) return truncateToUtf8Bytes(text, maxBytes);
+    final runes = text.runes.toList();
+    while (runes.isNotEmpty &&
+        _effectiveByteLength(String.fromCharCodes(runes)) > maxBytes) {
+      runes.removeLast();
     }
-    return buffer.toString();
+    return String.fromCharCodes(runes);
   }
 }

lib/l10n/app_localizations_bg.dart

@@ -1550,7 +1550,7 @@ class AppLocalizationsBg extends AppLocalizations {
   String get map_sharedPin => 'Споделено копие';
 
   @override
-  String get map_sharedAt => 'Shared';
+  String get map_sharedAt => 'Споделено';
 
   @override
   String get map_joinRoom => 'Присъедини се към стаята';

lib/l10n/app_localizations_de.dart

@@ -1550,7 +1550,7 @@ class AppLocalizationsDe extends AppLocalizations {
   String get map_sharedPin => 'Gemeinsames Passwort';
 
   @override
-  String get map_sharedAt => 'Shared';
+  String get map_sharedAt => 'Geteilt';
 
   @override
   String get map_joinRoom => 'Beitreten Sie dem Raum';

lib/l10n/app_localizations_es.dart

@@ -1548,7 +1548,7 @@ class AppLocalizationsEs extends AppLocalizations {
   String get map_sharedPin => 'Pin compartido';
 
   @override
-  String get map_sharedAt => 'Shared';
+  String get map_sharedAt => 'Compartido';
 
   @override
   String get map_joinRoom => 'Únete a la sala';

lib/l10n/app_localizations_fr.dart

@@ -1555,7 +1555,7 @@ class AppLocalizationsFr extends AppLocalizations {
   String get map_sharedPin => 'Clé partagée';
 
   @override
-  String get map_sharedAt => 'Shared';
+  String get map_sharedAt => 'Partagé';
 
   @override
   String get map_joinRoom => 'Rejoindre la salle';

lib/l10n/app_localizations_it.dart

@@ -1547,7 +1547,7 @@ class AppLocalizationsIt extends AppLocalizations {
   String get map_sharedPin => 'Condividi PIN';
 
   @override
-  String get map_sharedAt => 'Shared';
+  String get map_sharedAt => 'Condiviso';
 
   @override
   String get map_joinRoom => 'Unisciti alla stanza';

lib/l10n/app_localizations_nl.dart

@@ -1540,7 +1540,7 @@ class AppLocalizationsNl extends AppLocalizations {
   String get map_sharedPin => 'Gedeelde pin';
 
   @override
-  String get map_sharedAt => 'Shared';
+  String get map_sharedAt => 'Gedeeld';
 
   @override
   String get map_joinRoom => 'Sluit Kamer';

lib/l10n/app_localizations_pl.dart

@@ -1549,7 +1549,7 @@ class AppLocalizationsPl extends AppLocalizations {
   String get map_sharedPin => 'Podzielony PIN';
 
   @override
-  String get map_sharedAt => 'Shared';
+  String get map_sharedAt => 'Udostępnione';
 
   @override
   String get map_joinRoom => 'Dołącz do pokoju';

lib/l10n/app_localizations_pt.dart

@@ -1549,7 +1549,7 @@ class AppLocalizationsPt extends AppLocalizations {
   String get map_sharedPin => 'Pin compartilhado';
 
   @override
-  String get map_sharedAt => 'Shared';
+  String get map_sharedAt => 'Compartilhado';
 
   @override
   String get map_joinRoom => 'Junte-se à Sala';

lib/l10n/app_localizations_ru.dart

@@ -1551,7 +1551,7 @@ class AppLocalizationsRu extends AppLocalizations {
   String get map_sharedPin => 'Общая метка';
 
   @override
-  String get map_sharedAt => 'Shared';
+  String get map_sharedAt => 'Поделено';
 
   @override
   String get map_joinRoom => 'Присоединиться к комнате';

lib/l10n/app_localizations_sk.dart

@@ -1543,7 +1543,7 @@ class AppLocalizationsSk extends AppLocalizations {
   String get map_sharedPin => 'Zdieľaný PIN';
 
   @override
-  String get map_sharedAt => 'Shared';
+  String get map_sharedAt => 'Zdieľané';
 
   @override
   String get map_joinRoom => 'Pripojiť miestnosť';

lib/l10n/app_localizations_sl.dart

@@ -1536,7 +1536,7 @@ class AppLocalizationsSl extends AppLocalizations {
   String get map_sharedPin => 'Deljeno naslovno geslo';
 
   @override
-  String get map_sharedAt => 'Shared';
+  String get map_sharedAt => 'Deljeno';
 
   @override
   String get map_joinRoom => 'Pridružiti sobo';

lib/l10n/app_localizations_sv.dart

@@ -1533,7 +1533,7 @@ class AppLocalizationsSv extends AppLocalizations {
   String get map_sharedPin => 'Delad PIN';
 
   @override
-  String get map_sharedAt => 'Shared';
+  String get map_sharedAt => 'Delad';
 
   @override
   String get map_joinRoom => 'Gå med i rum';

lib/l10n/app_localizations_uk.dart

@@ -1548,7 +1548,7 @@ class AppLocalizationsUk extends AppLocalizations {
   String get map_sharedPin => 'Спільний пін';
 
   @override
-  String get map_sharedAt => 'Shared';
+  String get map_sharedAt => 'Поділено';
 
   @override
   String get map_joinRoom => 'Приєднатися до кімнати';

lib/l10n/app_localizations_zh.dart

@@ -1054,13 +1054,13 @@ class AppLocalizationsZh extends AppLocalizations {
   String get chat_sendGif => '发送 GIF';
 
   @override
-  String get chat_insertEmoji => 'Insert emoji';
+  String get chat_insertEmoji => '插入表情';
 
   @override
-  String get chat_shareLocation => 'Share location';
+  String get chat_shareLocation => '分享位置';
 
   @override
-  String get chat_locationUnavailable => 'Location not available';
+  String get chat_locationUnavailable => '位置不可用';
 
   @override
   String get chat_reply => '回复';
@@ -1459,7 +1459,7 @@ class AppLocalizationsZh extends AppLocalizations {
   String get map_sharedPin => '共享标记';
 
   @override
-  String get map_sharedAt => 'Shared';
+  String get map_sharedAt => '已分享';
 
   @override
   String get map_joinRoom => '加入房间';

lib/screens/channel_chat_screen.dart

@@ -14,6 +14,7 @@ import '../connector/meshcore_protocol.dart';
 import '../helpers/link_handler.dart';
 import '../helpers/reaction_helper.dart';
 import '../helpers/utf8_length_limiter.dart';
+import '../helpers/smaz.dart';
 import '../l10n/l10n.dart';
 import '../models/channel.dart';
 import '../models/channel_message.dart';
@@ -827,28 +828,30 @@ class _ChannelChatScreenState extends State<ChannelChatScreen> {
     );
   }
 
+  void _insertTextAtCursor(String text) {
+    final currentValue = _textController.value;
+    final selection = currentValue.selection;
+    final newText = selection.isValid
+        ? currentValue.text.replaceRange(selection.start, selection.end, text)
+        : currentValue.text + text;
+    final caret =
+        (selection.isValid ? selection.start : currentValue.text.length) +
+        text.length;
+
+    _textController.value = currentValue.copyWith(
+      text: newText,
+      selection: TextSelection.collapsed(offset: caret),
+    );
+  }
+
   void _showEmojiPickerForComposer(BuildContext context) {
     showModalBottomSheet(
       context: context,
       isScrollControlled: true,
       builder: (context) => EmojiPicker(
+        title: context.l10n.chat_insertEmoji,
         onEmojiSelected: (emoji) {
-          final currentValue = _textController.value;
-          final selection = currentValue.selection;
-          final newText = selection.isValid
-              ? currentValue.text.replaceRange(
-                  selection.start,
-                  selection.end,
-                  emoji,
-                )
-              : currentValue.text + emoji;
-          final caret =
-              (selection.isValid ? selection.start : currentValue.text.length) +
-              emoji.length;
-          _textController.value = currentValue.copyWith(
-            text: newText,
-            selection: TextSelection.collapsed(offset: caret),
-          );
+          _insertTextAtCursor(emoji);
           _textFieldFocusNode.requestFocus();
         },
       ),
@@ -875,7 +878,11 @@ class _ChannelChatScreenState extends State<ChannelChatScreen> {
     final defaultLabel =
         '${connector.deviceDisplayName} ${DateTime.now().toUtc().toIso8601String()}';
     final controller = TextEditingController(
-      text: _truncateToUtf8Bytes(defaultLabel, maxLabelBytes),
+      text: truncateToUtf8Bytes(defaultLabel, maxLabelBytes),
+    );
+    controller.selection = TextSelection(
+      baseOffset: 0,
+      extentOffset: controller.text.length,
     );
 
     var label = await showDialog<String>(
@@ -916,23 +923,39 @@ class _ChannelChatScreenState extends State<ChannelChatScreen> {
       );
       return;
     }
+
+    if (widget.channel.isPublicChannel) {
+      final channelLabel = widget.channel.name.isEmpty
+          ? context.l10n.channels_channelIndex(widget.channel.index)
+          : widget.channel.name;
+      final canShare = await _confirmPublicShare(channelLabel);
+      if (!mounted || !canShare) return;
+    }
+
     connector.sendChannelMessage(widget.channel, markerText);
   }
 
-  String _truncateToUtf8Bytes(String text, int maxBytes) {
-    if (maxBytes <= 0) return '';
-
-    final buffer = StringBuffer();
-    var usedBytes = 0;
-    for (final rune in text.runes) {
-      final character = String.fromCharCode(rune);
-      final characterBytes = utf8.encode(character).length;
-      if (usedBytes + characterBytes > maxBytes) break;
-      buffer.write(character);
-      usedBytes += characterBytes;
-    }
-
-    return buffer.toString();
+  Future<bool> _confirmPublicShare(String channelLabel) async {
+    final result = await showDialog<bool>(
+      context: context,
+      builder: (dialogContext) => AlertDialog(
+        title: Text(context.l10n.map_publicLocationShare),
+        content: Text(
+          context.l10n.map_publicLocationShareConfirm(channelLabel),
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.pop(dialogContext, false),
+            child: Text(context.l10n.common_cancel),
+          ),
+          TextButton(
+            onPressed: () => Navigator.pop(dialogContext, true),
+            child: Text(context.l10n.common_share),
+          ),
+        ],
+      ),
+    );
+    return result ?? false;
   }
 
   Widget _buildAvatar(String senderName) {
@@ -1043,6 +1066,9 @@ class _ChannelChatScreenState extends State<ChannelChatScreen> {
   Widget _buildMessageComposer() {
     final connector = context.watch<MeshCoreConnector>();
     final maxBytes = maxChannelMessageBytes(connector.selfName);
+    final smazEncoder = connector.isChannelSmazEnabled(widget.channel.index)
+        ? Smaz.encodeIfSmaller
+        : null;
     return Column(
       mainAxisSize: MainAxisSize.min,
       children: [
@@ -1169,7 +1195,10 @@ class _ChannelChatScreenState extends State<ChannelChatScreen> {
                       controller: _textController,
                       focusNode: _textFieldFocusNode,
                       inputFormatters: [
-                        Utf8LengthLimitingTextInputFormatter(maxBytes),
+                        Utf8LengthLimitingTextInputFormatter(
+                          maxBytes,
+                          encoder: smazEncoder,
+                        ),
                       ],
                       textCapitalization: TextCapitalization.sentences,
                       decoration: InputDecoration(
@@ -1305,6 +1334,7 @@ class _ChannelChatScreenState extends State<ChannelChatScreen> {
       context: context,
       isScrollControlled: true,
       builder: (context) => EmojiPicker(
+        title: context.l10n.chat_addReaction,
         onEmojiSelected: (emoji) {
           _sendReaction(message, emoji);
         },

lib/screens/chat_screen.dart

@@ -17,6 +17,7 @@ import '../widgets/message_status_icon.dart';
 import '../helpers/chat_scroll_controller.dart';
 import '../helpers/link_handler.dart';
 import '../helpers/utf8_length_limiter.dart';
+import '../helpers/smaz.dart';
 import '../models/channel_message.dart';
 import '../models/contact.dart';
 import '../models/message.dart';
@@ -336,6 +337,10 @@ class _ChatScreenState extends State<ChatScreen> {
   Widget _buildInputBar(MeshCoreConnector connector) {
     final maxBytes = maxContactMessageBytes();
     final colorScheme = Theme.of(context).colorScheme;
+    final smazEncoder =
+        connector.isContactSmazEnabled(widget.contact.publicKeyHex)
+        ? Smaz.encodeIfSmaller
+        : null;
     return Container(
       padding: const EdgeInsets.all(8),
       decoration: BoxDecoration(
@@ -442,7 +447,10 @@ class _ChatScreenState extends State<ChatScreen> {
                     controller: _textController,
                     focusNode: _textFieldFocusNode,
                     inputFormatters: [
-                      Utf8LengthLimitingTextInputFormatter(maxBytes),
+                      Utf8LengthLimitingTextInputFormatter(
+                        maxBytes,
+                        encoder: smazEncoder,
+                      ),
                     ],
                     textCapitalization: TextCapitalization.sentences,
                     decoration: InputDecoration(
@@ -497,6 +505,7 @@ class _ChatScreenState extends State<ChatScreen> {
       context: context,
       isScrollControlled: true,
       builder: (context) => EmojiPicker(
+        title: context.l10n.chat_insertEmoji,
         onEmojiSelected: (emoji) {
           _insertTextAtCursor(emoji);
           _textFieldFocusNode.requestFocus();
@@ -524,7 +533,11 @@ class _ChatScreenState extends State<ChatScreen> {
     final defaultLabel =
         '${connector.deviceDisplayName} ${DateTime.now().toUtc().toIso8601String()}';
     final controller = TextEditingController(
-      text: _truncateToUtf8Bytes(defaultLabel, maxLabelBytes),
+      text: truncateToUtf8Bytes(defaultLabel, maxLabelBytes),
+    );
+    controller.selection = TextSelection(
+      baseOffset: 0,
+      extentOffset: controller.text.length,
     );
 
     var label = await showDialog<String>(
@@ -567,22 +580,6 @@ class _ChatScreenState extends State<ChatScreen> {
     connector.sendMessage(widget.contact, markerText);
   }
 
-  String _truncateToUtf8Bytes(String text, int maxBytes) {
-    if (maxBytes <= 0) return '';
-
-    final buffer = StringBuffer();
-    var usedBytes = 0;
-    for (final rune in text.runes) {
-      final character = String.fromCharCode(rune);
-      final characterBytes = utf8.encode(character).length;
-      if (usedBytes + characterBytes > maxBytes) break;
-      buffer.write(character);
-      usedBytes += characterBytes;
-    }
-
-    return buffer.toString();
-  }
-
   void _showGifPicker(BuildContext context) {
     showModalBottomSheet(
       context: context,
@@ -1309,6 +1306,7 @@ class _ChatScreenState extends State<ChatScreen> {
       context: context,
       isScrollControlled: true,
       builder: (context) => EmojiPicker(
+        title: context.l10n.chat_addReaction,
         onEmojiSelected: (emoji) {
           _sendReaction(message, senderContact, emoji);
         },

lib/screens/map_screen.dart

@@ -1486,6 +1486,10 @@ class _MapScreenState extends State<MapScreen> {
     String defaultLabel,
   ) async {
     final controller = TextEditingController(text: defaultLabel);
+    controller.selection = TextSelection(
+      baseOffset: 0,
+      extentOffset: controller.text.length,
+    );
     return showDialog<String>(
       context: context,
       builder: (dialogContext) => AlertDialog(

lib/widgets/emoji_picker.dart

@@ -4,8 +4,9 @@ import '../l10n/l10n.dart';
 
 class EmojiPicker extends StatelessWidget {
   final Function(String) onEmojiSelected;
+  final String? title;
 
-  const EmojiPicker({super.key, required this.onEmojiSelected});
+  const EmojiPicker({super.key, required this.onEmojiSelected, this.title});
 
   static const List<String> quickEmojis = ['👍', '❤️', '😂', '🎉', '👏', '🔥'];
 
@@ -223,7 +224,7 @@ class EmojiPicker extends StatelessWidget {
               mainAxisAlignment: MainAxisAlignment.spaceBetween,
               children: [
                 Text(
-                  l10n.chat_addReaction,
+                  title ?? l10n.chat_addReaction,
                   style: const TextStyle(
                     fontSize: 18,
                     fontWeight: FontWeight.bold,

untranslated.json

@@ -1,29 +1 @@
-{
-  "bg": [],
-
-  "de": [],
-
-  "es": [],
-
-  "fr": [],
-
-  "it": [],
-
-  "nl": [],
-
-  "pl": [],
-
-  "pt": [],
-
-  "ru": [],
-
-  "sk": [],
-
-  "sl": [],
-
-  "sv": [],
-
-  "uk": [],
-
-  "zh": []
-}
+{}