Center wallet setup screen around Peya branding

lib/ui/screens/wallet_setup_screen.dart

@@ -19,44 +19,59 @@ class WalletSetupScreen extends ConsumerWidget {
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     final state = ref.watch(walletControllerProvider);
-    final l10n = context.l10n;
 
     return Scaffold(
-      appBar: AppBar(
-        title: Text(l10n.walletSetupTitle),
-      ),
-      body: Padding(
-        padding: const EdgeInsets.all(24),
-        child: Column(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            if (state.error != null)
-              _ErrorBanner(message: l10n.errorMessage(state.error!)),
-            const SizedBox(height: 16),
-            Text(
-              l10n.walletSetupSubtitle,
-              style: Theme.of(context).textTheme.titleLarge,
+      body: SafeArea(
+        child: Center(
+          child: Padding(
+            padding: const EdgeInsets.all(24),
+            child: ConstrainedBox(
+              constraints: const BoxConstraints(maxWidth: 860),
+              child: Column(
+                mainAxisAlignment: MainAxisAlignment.center,
+                children: [
+                  if (state.error != null) ...[
+                    _ErrorBanner(message: context.l10n.errorMessage(state.error!)),
+                    const SizedBox(height: 24),
+                  ],
+                  Image.asset(
+                    'assets/logo.png',
+                    width: 132,
+                    height: 132,
+                  ),
+                  const SizedBox(height: 18),
+                  Text(
+                    'Peya Wallet',
+                    textAlign: TextAlign.center,
+                    style: Theme.of(context).textTheme.headlineMedium?.copyWith(
+                          fontWeight: FontWeight.w800,
+                          letterSpacing: 0.3,
+                        ),
+                  ),
+                  const SizedBox(height: 32),
+                  Wrap(
+                    alignment: WrapAlignment.center,
+                    spacing: 16,
+                    runSpacing: 16,
+                    children: [
+                      _ActionCard(
+                        title: context.l10n.openWalletAction,
+                        onPressed: () => _showOpenDialog(context, ref),
+                      ),
+                      _ActionCard(
+                        title: context.l10n.restoreWalletAction,
+                        onPressed: () => _showRestoreDialog(context, ref),
+                      ),
+                      _ActionCard(
+                        title: context.l10n.createWalletAction,
+                        onPressed: () => _showCreateDialog(context, ref),
+                      ),
+                    ],
+                  ),
+                ],
+              ),
             ),
-            const SizedBox(height: 16),
-            Wrap(
-              spacing: 16,
-              runSpacing: 16,
-              children: [
-                _ActionCard(
-                  title: l10n.openWalletAction,
-                  onPressed: () => _showOpenDialog(context, ref),
-                ),
-                _ActionCard(
-                  title: l10n.restoreWalletAction,
-                  onPressed: () => _showRestoreDialog(context, ref),
-                ),
-                _ActionCard(
-                  title: l10n.createWalletAction,
-                  onPressed: () => _showCreateDialog(context, ref),
-                ),
-              ],
-            ),
-          ],
+          ),
         ),
       ),
     );