feat(#234): make own device pubkey full, selectable, and one-tap copyable

Settings showed the self public key truncated to 16 hex chars + "..." as
plain Text (settings_screen:262/:410), so it couldn't be shared. Show the
full key, make it selectable, and add a copy button beside it.

- _buildInfoRow gains an optional copyValue: renders the value as
  SelectableText + a copy IconButton that copies the full key and shows a
  "Public key copied" snackbar. Both self-pubkey rows pass the full key.
- New l10n string settings_publicKeyCopied (regenerated localizations +
  untranslated.json).

Part of #234.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

lib/l10n/app_en.arb

@@ -238,6 +238,7 @@
   "settings_infoModel": "Model",
   "settings_infoBattery": "Battery",
   "settings_infoPublicKey": "Public Key",
+  "settings_publicKeyCopied": "Public key copied",
   "settings_infoContactsCount": "Contacts Count",
   "settings_infoChannelCount": "Channel Count",
   "settings_presets": "Presets",

lib/l10n/app_localizations.dart

@@ -1186,6 +1186,12 @@ abstract class AppLocalizations {
   /// **'Public Key'**
   String get settings_infoPublicKey;
 
+  /// No description provided for @settings_publicKeyCopied.
+  ///
+  /// In en, this message translates to:
+  /// **'Public key copied'**
+  String get settings_publicKeyCopied;
+
   /// No description provided for @settings_infoContactsCount.
   ///
   /// In en, this message translates to:

lib/l10n/app_localizations_bg.dart

@@ -596,6 +596,9 @@ class AppLocalizationsBg extends AppLocalizations {
   @override
   String get settings_infoPublicKey => 'Общ публичен ключ';
 
+  @override
+  String get settings_publicKeyCopied => 'Public key copied';
+
   @override
   String get settings_infoContactsCount => 'Брой контакти';
 

lib/l10n/app_localizations_de.dart

@@ -591,6 +591,9 @@ class AppLocalizationsDe extends AppLocalizations {
   @override
   String get settings_infoPublicKey => 'Öffentlicher Schlüssel';
 
+  @override
+  String get settings_publicKeyCopied => 'Public key copied';
+
   @override
   String get settings_infoContactsCount => 'Anzahl Kontakte';
 

lib/l10n/app_localizations_en.dart

@@ -581,6 +581,9 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get settings_infoPublicKey => 'Public Key';
 
+  @override
+  String get settings_publicKeyCopied => 'Public key copied';
+
   @override
   String get settings_infoContactsCount => 'Contacts Count';
 

lib/l10n/app_localizations_es.dart

@@ -592,6 +592,9 @@ class AppLocalizationsEs extends AppLocalizations {
   @override
   String get settings_infoPublicKey => 'Clave Pública';
 
+  @override
+  String get settings_publicKeyCopied => 'Public key copied';
+
   @override
   String get settings_infoContactsCount => 'Número de contactos';
 

lib/l10n/app_localizations_fr.dart

@@ -596,6 +596,9 @@ class AppLocalizationsFr extends AppLocalizations {
   @override
   String get settings_infoPublicKey => 'Clé Publique';
 
+  @override
+  String get settings_publicKeyCopied => 'Public key copied';
+
   @override
   String get settings_infoContactsCount => 'Nombre de contacts';
 

lib/l10n/app_localizations_hu.dart

@@ -594,6 +594,9 @@ class AppLocalizationsHu extends AppLocalizations {
   @override
   String get settings_infoPublicKey => 'Nyelvkönyv';
 
+  @override
+  String get settings_publicKeyCopied => 'Public key copied';
+
   @override
   String get settings_infoContactsCount => 'Kapcsolatok száma';
 

lib/l10n/app_localizations_it.dart

@@ -594,6 +594,9 @@ class AppLocalizationsIt extends AppLocalizations {
   @override
   String get settings_infoPublicKey => 'Chiave Pubblica';
 
+  @override
+  String get settings_publicKeyCopied => 'Public key copied';
+
   @override
   String get settings_infoContactsCount => 'Numero contatti';
 

lib/l10n/app_localizations_ja.dart

@@ -567,6 +567,9 @@ class AppLocalizationsJa extends AppLocalizations {
   @override
   String get settings_infoPublicKey => '公開鍵';
 
+  @override
+  String get settings_publicKeyCopied => 'Public key copied';
+
   @override
   String get settings_infoContactsCount => '連絡先数';
 

lib/l10n/app_localizations_ko.dart

@@ -567,6 +567,9 @@ class AppLocalizationsKo extends AppLocalizations {
   @override
   String get settings_infoPublicKey => '공개 키';
 
+  @override
+  String get settings_publicKeyCopied => 'Public key copied';
+
   @override
   String get settings_infoContactsCount => '연락처 수';
 

lib/l10n/app_localizations_nl.dart

@@ -588,6 +588,9 @@ class AppLocalizationsNl extends AppLocalizations {
   @override
   String get settings_infoPublicKey => 'Openbare Sleutel';
 
+  @override
+  String get settings_publicKeyCopied => 'Public key copied';
+
   @override
   String get settings_infoContactsCount => 'Aantal Contacten';
 

lib/l10n/app_localizations_pl.dart

@@ -596,6 +596,9 @@ class AppLocalizationsPl extends AppLocalizations {
   @override
   String get settings_infoPublicKey => 'Klucz Publiczny';
 
+  @override
+  String get settings_publicKeyCopied => 'Public key copied';
+
   @override
   String get settings_infoContactsCount => 'Liczba kontaktów';
 

lib/l10n/app_localizations_pt.dart

@@ -594,6 +594,9 @@ class AppLocalizationsPt extends AppLocalizations {
   @override
   String get settings_infoPublicKey => 'Chave Pública';
 
+  @override
+  String get settings_publicKeyCopied => 'Public key copied';
+
   @override
   String get settings_infoContactsCount => 'Número de Contatos';
 

lib/l10n/app_localizations_ru.dart

@@ -593,6 +593,9 @@ class AppLocalizationsRu extends AppLocalizations {
   @override
   String get settings_infoPublicKey => 'Публичный ключ';
 
+  @override
+  String get settings_publicKeyCopied => 'Public key copied';
+
   @override
   String get settings_infoContactsCount => 'Количество контактов';
 

lib/l10n/app_localizations_sk.dart

@@ -588,6 +588,9 @@ class AppLocalizationsSk extends AppLocalizations {
   @override
   String get settings_infoPublicKey => 'Verejný kľúč';
 
+  @override
+  String get settings_publicKeyCopied => 'Public key copied';
+
   @override
   String get settings_infoContactsCount => 'Počet kontaktov';
 

lib/l10n/app_localizations_sl.dart

@@ -585,6 +585,9 @@ class AppLocalizationsSl extends AppLocalizations {
   @override
   String get settings_infoPublicKey => 'Javni ključ';
 
+  @override
+  String get settings_publicKeyCopied => 'Public key copied';
+
   @override
   String get settings_infoContactsCount => 'Število stikov';
 

lib/l10n/app_localizations_sv.dart

@@ -583,6 +583,9 @@ class AppLocalizationsSv extends AppLocalizations {
   @override
   String get settings_infoPublicKey => 'Allmänt nyckel';
 
+  @override
+  String get settings_publicKeyCopied => 'Public key copied';
+
   @override
   String get settings_infoContactsCount => 'Kontakterantal';
 

lib/l10n/app_localizations_uk.dart

@@ -591,6 +591,9 @@ class AppLocalizationsUk extends AppLocalizations {
   @override
   String get settings_infoPublicKey => 'Відкритий ключ';
 
+  @override
+  String get settings_publicKeyCopied => 'Public key copied';
+
   @override
   String get settings_infoContactsCount => 'Кількість контактів';
 

lib/l10n/app_localizations_zh.dart

@@ -559,6 +559,9 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get settings_infoPublicKey => '公钥';
 
+  @override
+  String get settings_publicKeyCopied => 'Public key copied';
+
   @override
   String get settings_infoContactsCount => '联系人数量';
 

lib/screens/settings_screen.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:meshcore_open/utils/gpx_export.dart';
 import 'package:meshcore_open/widgets/elements_ui.dart';
 import 'package:provider/provider.dart';
@@ -259,7 +260,8 @@ class _SettingsScreenState extends State<SettingsScreen> {
                   padding: const EdgeInsets.fromLTRB(16, 8, 16, 12),
                   child: _buildInfoRow(
                     l10n.settings_infoPublicKey,
-                    '${pubKeyToHex(connector.selfPublicKey!).substring(0, 16)}...',
+                    pubKeyToHex(connector.selfPublicKey!),
+                    copyValue: pubKeyToHex(connector.selfPublicKey!),
                   ),
                 ),
               ],
@@ -407,7 +409,8 @@ class _SettingsScreenState extends State<SettingsScreen> {
             if (connector.selfPublicKey != null)
               _buildInfoRow(
                 l10n.settings_infoPublicKey,
-                '${pubKeyToHex(connector.selfPublicKey!).substring(0, 16)}...',
+                pubKeyToHex(connector.selfPublicKey!),
+                copyValue: pubKeyToHex(connector.selfPublicKey!),
               ),
             _buildInfoRow(
               l10n.settings_infoContactsCount,
@@ -643,6 +646,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
     Widget? leading,
     Color? valueColor,
     VoidCallback? onTap,
+    String? copyValue,
   }) {
     final theme = Theme.of(context);
 
@@ -666,13 +670,43 @@ class _SettingsScreenState extends State<SettingsScreen> {
             ],
           ),
           const SizedBox(height: 4),
-          Text(
+          if (copyValue == null)
-            value,
+            Text(
-            style: theme.textTheme.bodyLarge?.copyWith(
+              value,
-              color: valueColor,
+              style: theme.textTheme.bodyLarge?.copyWith(
-              fontWeight: FontWeight.w500,
+                color: valueColor,
+                fontWeight: FontWeight.w500,
+              ),
+            )
+          else
+            Row(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: [
+                Expanded(
+                  child: SelectableText(
+                    value,
+                    style: theme.textTheme.bodyLarge?.copyWith(
+                      color: valueColor,
+                      fontWeight: FontWeight.w500,
+                    ),
+                  ),
+                ),
+                IconButton(
+                  icon: const Icon(Icons.copy, size: 18),
+                  tooltip: context.l10n.common_copy,
+                  visualDensity: VisualDensity.compact,
+                  onPressed: () async {
+                    await Clipboard.setData(ClipboardData(text: copyValue));
+                    if (!mounted) return;
+                    ScaffoldMessenger.of(context).showSnackBar(
+                      SnackBar(
+                        content: Text(context.l10n.settings_publicKeyCopied),
+                      ),
+                    );
+                  },
+                ),
+              ],
             ),
-          ),
         ],
       ),
     );

untranslated.json

@@ -14,6 +14,7 @@
     "settings_gpsStatusNoResponse",
     "settings_infoFirmware",
     "settings_infoModel",
+    "settings_publicKeyCopied",
     "appSettings_clock",
     "appSettings_clockSystem",
     "appSettings_clock12h",
@@ -66,6 +67,7 @@
     "settings_gpsStatusNoResponse",
     "settings_infoFirmware",
     "settings_infoModel",
+    "settings_publicKeyCopied",
     "appSettings_clock",
     "appSettings_clockSystem",
     "appSettings_clock12h",
@@ -118,6 +120,7 @@
     "settings_gpsStatusNoResponse",
     "settings_infoFirmware",
     "settings_infoModel",
+    "settings_publicKeyCopied",
     "appSettings_clock",
     "appSettings_clockSystem",
     "appSettings_clock12h",
@@ -170,6 +173,7 @@
     "settings_gpsStatusNoResponse",
     "settings_infoFirmware",
     "settings_infoModel",
+    "settings_publicKeyCopied",
     "appSettings_clock",
     "appSettings_clockSystem",
     "appSettings_clock12h",
@@ -222,6 +226,7 @@
     "settings_gpsStatusNoResponse",
     "settings_infoFirmware",
     "settings_infoModel",
+    "settings_publicKeyCopied",
     "appSettings_clock",
     "appSettings_clockSystem",
     "appSettings_clock12h",
@@ -274,6 +279,7 @@
     "settings_gpsStatusNoResponse",
     "settings_infoFirmware",
     "settings_infoModel",
+    "settings_publicKeyCopied",
     "appSettings_clock",
     "appSettings_clockSystem",
     "appSettings_clock12h",
@@ -326,6 +332,7 @@
     "settings_gpsStatusNoResponse",
     "settings_infoFirmware",
     "settings_infoModel",
+    "settings_publicKeyCopied",
     "appSettings_clock",
     "appSettings_clockSystem",
     "appSettings_clock12h",
@@ -378,6 +385,7 @@
     "settings_gpsStatusNoResponse",
     "settings_infoFirmware",
     "settings_infoModel",
+    "settings_publicKeyCopied",
     "appSettings_clock",
     "appSettings_clockSystem",
     "appSettings_clock12h",
@@ -430,6 +438,7 @@
     "settings_gpsStatusNoResponse",
     "settings_infoFirmware",
     "settings_infoModel",
+    "settings_publicKeyCopied",
     "appSettings_clock",
     "appSettings_clockSystem",
     "appSettings_clock12h",
@@ -482,6 +491,7 @@
     "settings_gpsStatusNoResponse",
     "settings_infoFirmware",
     "settings_infoModel",
+    "settings_publicKeyCopied",
     "appSettings_clock",
     "appSettings_clockSystem",
     "appSettings_clock12h",
@@ -534,6 +544,7 @@
     "settings_gpsStatusNoResponse",
     "settings_infoFirmware",
     "settings_infoModel",
+    "settings_publicKeyCopied",
     "appSettings_clock",
     "appSettings_clockSystem",
     "appSettings_clock12h",
@@ -586,6 +597,7 @@
     "settings_gpsStatusNoResponse",
     "settings_infoFirmware",
     "settings_infoModel",
+    "settings_publicKeyCopied",
     "appSettings_clock",
     "appSettings_clockSystem",
     "appSettings_clock12h",
@@ -638,6 +650,7 @@
     "settings_gpsStatusNoResponse",
     "settings_infoFirmware",
     "settings_infoModel",
+    "settings_publicKeyCopied",
     "appSettings_clock",
     "appSettings_clockSystem",
     "appSettings_clock12h",
@@ -690,6 +703,7 @@
     "settings_gpsStatusNoResponse",
     "settings_infoFirmware",
     "settings_infoModel",
+    "settings_publicKeyCopied",
     "appSettings_clock",
     "appSettings_clockSystem",
     "appSettings_clock12h",
@@ -742,6 +756,7 @@
     "settings_gpsStatusNoResponse",
     "settings_infoFirmware",
     "settings_infoModel",
+    "settings_publicKeyCopied",
     "appSettings_clock",
     "appSettings_clockSystem",
     "appSettings_clock12h",
@@ -794,6 +809,7 @@
     "settings_gpsStatusNoResponse",
     "settings_infoFirmware",
     "settings_infoModel",
+    "settings_publicKeyCopied",
     "appSettings_clock",
     "appSettings_clockSystem",
     "appSettings_clock12h",
@@ -846,6 +862,7 @@
     "settings_gpsStatusNoResponse",
     "settings_infoFirmware",
     "settings_infoModel",
+    "settings_publicKeyCopied",
     "appSettings_clock",
     "appSettings_clockSystem",
     "appSettings_clock12h",