Wallet update for correct name and symbol appearance

frontend/pweb/lib/pages/wallet_top_up/header.dart

@@ -5,18 +5,24 @@ import 'package:pweb/generated/i18n/app_localizations.dart';
 
 class WalletTopUpHeader extends StatelessWidget {
   final VoidCallback onBack;
-  final String walletName;
+  final String? tokenSymbol;
 
   const WalletTopUpHeader({
     super.key,
     required this.onBack,
-    required this.walletName,
+    this.tokenSymbol,
   });
 
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
     final loc = AppLocalizations.of(context)!;
+    final symbol = tokenSymbol?.trim();
+
+    final subtitle = [
+      'Crypto Wallet',
+      if (symbol != null && symbol.isNotEmpty) symbol,
+    ].join(' · ');
 
     return Row(
       children: [
@@ -34,7 +40,7 @@ class WalletTopUpHeader extends StatelessWidget {
             ),
             const SizedBox(height: 4),
             Text(
-              walletName,
+              subtitle,
               style: theme.textTheme.bodyMedium?.copyWith(
                 color: theme.colorScheme.onSurfaceVariant,
               ),