Fallback close dialog localization on desktop

lib/app.dart

@@ -325,30 +325,40 @@ class _PeyaAppState extends ConsumerState<PeyaApp> with WindowListener {
     );
     var shouldStopLocalNode = false;
     if (shouldPromptForLocalNode) {
-      final l10n = AppLocalizations.of(context);
-      if (l10n == null || !mounted) {
-        await _logCloseDebug('handleAppCloseRequest aborted: l10n null or not mounted');
+      if (!mounted) {
+        await _logCloseDebug('handleAppCloseRequest aborted: not mounted');
         return false;
       }
+      final dialogContext = _scaffoldMessengerKey.currentContext ?? context;
+      final l10n = AppLocalizations.of(dialogContext);
       await _logCloseDebug('handleAppCloseRequest showing dialog');
       final decision = await showDialog<bool?>(
-        context: context,
+        context: dialogContext,
         builder: (dialogContext) {
           return AlertDialog(
-            title: Text(l10n.closeWalletNodeDialogTitle),
-            content: Text(l10n.closeWalletNodeDialogBody),
+            title: Text(
+              l10n?.closeWalletNodeDialogTitle ?? 'Close wallet?',
+            ),
+            content: Text(
+              l10n?.closeWalletNodeDialogBody ??
+                  'A local node is still running. Do you want to keep it running after closing the wallet?',
+            ),
             actions: [
               TextButton(
                 onPressed: () => Navigator.of(dialogContext).pop(null),
-                child: Text(l10n.cancelAction),
+                child: Text(l10n?.cancelAction ?? 'Cancel'),
               ),
               TextButton(
                 onPressed: () => Navigator.of(dialogContext).pop(false),
-                child: Text(l10n.closeWalletKeepNodeAction),
+                child: Text(
+                  l10n?.closeWalletKeepNodeAction ?? 'Keep node running',
+                ),
               ),
               ElevatedButton(
                 onPressed: () => Navigator.of(dialogContext).pop(true),
-                child: Text(l10n.closeWalletStopNodeAction),
+                child: Text(
+                  l10n?.closeWalletStopNodeAction ?? 'Stop node and close',
+                ),
               ),
             ],
           );