fix: Improve error handling when restoring last companion public key and update disconnection message in Dutch localization

lib/connector/meshcore_connector.dart

@@ -973,12 +973,18 @@ class MeshCoreConnector extends ChangeNotifier {
     final lastCompanionPublicKeyHex = prefs.getString(
       _lastCompanionPublicKeyPref,
     );
-    if (lastCompanionPublicKeyHex == null ||
-        lastCompanionPublicKeyHex.trim().isEmpty) {
-      return;
+    try {
+      if (lastCompanionPublicKeyHex == null ||
+          lastCompanionPublicKeyHex.trim().isEmpty) {
+        return;
+      }
+      _selfPublicKey = hexToPubKey(lastCompanionPublicKeyHex);
+      _setScopedStorePublicKey(lastCompanionPublicKeyHex);
+    } catch (e) {
+      _appDebugLogService?.error(
+        'Failed to restore last companion scope with public key hex: $lastCompanionPublicKeyHex, error: $e',
+      );
     }
-    _selfPublicKey = hexToPubKey(lastCompanionPublicKeyHex);
-    _setScopedStorePublicKey(lastCompanionPublicKeyHex);
   }
 
   Future<void> loadDiscoveredContactCache() => _loadDiscoveredContactCache();

lib/l10n/app_localizations_nl.dart

@@ -1968,7 +1968,7 @@ class AppLocalizationsNl extends AppLocalizations {
 
   @override
   String get dialog_disconnectedMessage =>
-      'Je bent verbonden met je companion.';
+      'Je bent losgekoppeld van je companion.';
 
   @override
   String get dialog_connectCompanion =>

lib/screens/contacts_screen.dart

@@ -324,12 +324,12 @@ class _ContactsScreenState extends State<ContactsScreen> {
                         Text(context.l10n.contacts_zeroHopAdvert),
                       ],
                     ),
-                    onTap: () => {
-                      connector.sendSelfAdvert(flood: false),
+                    onTap: () async {
+                      await connector.sendSelfAdvert(flood: false);
                       showDismissibleSnackBar(
                         context,
                         content: Text(context.l10n.settings_advertisementSent),
-                      ),
+                      );
                     },
                   ),
                   PopupMenuItem(
@@ -340,12 +340,12 @@ class _ContactsScreenState extends State<ContactsScreen> {
                         Text(context.l10n.contacts_floodAdvert),
                       ],
                     ),
-                    onTap: () => {
-                      connector.sendSelfAdvert(flood: true),
+                    onTap: () async {
+                      await connector.sendSelfAdvert(flood: true);
                       showDismissibleSnackBar(
                         context,
                         content: Text(context.l10n.settings_advertisementSent),
-                      ),
+                      );
                     },
                   ),
                   PopupMenuItem(