Top Up Balance logic and Added fixes for routing

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

@@ -0,0 +1,96 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+import 'package:qr_flutter/qr_flutter.dart';
+
+import 'package:pweb/utils/dimensions.dart';
+
+import 'package:pweb/generated/i18n/app_localizations.dart';
+
+
+class WalletTopUpAddressBlock extends StatelessWidget {
+  final String address;
+  final AppDimensions dimensions;
+
+  const WalletTopUpAddressBlock({
+    super.key,
+    required this.address,
+    required this.dimensions,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final loc = AppLocalizations.of(context)!;
+
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        Row(
+          mainAxisAlignment: MainAxisAlignment.spaceBetween,
+          children: [
+            Text(
+              loc.walletTopUpAddressLabel,
+              style: theme.textTheme.titleSmall,
+            ),
+            TextButton.icon(
+              icon: const Icon(Icons.copy, size: 16),
+              label: Text(loc.copyAddress),
+              onPressed: () {
+                Clipboard.setData(ClipboardData(text: address));
+                ScaffoldMessenger.of(context).showSnackBar(
+                  SnackBar(content: Text(loc.addressCopied)),
+                );
+              },
+            ),
+          ],
+        ),
+        const SizedBox(height: 6),
+        Container(
+          width: double.infinity,
+          padding: EdgeInsets.all(dimensions.paddingMedium),
+          decoration: BoxDecoration(
+            borderRadius: BorderRadius.circular(dimensions.borderRadiusSmall),
+            border: Border.all(color: theme.colorScheme.outlineVariant),
+            color: theme.colorScheme.surfaceVariant.withOpacity(0.4),
+          ),
+          child: SelectableText(
+            address,
+            style: theme.textTheme.bodyLarge?.copyWith(
+              fontFeatures: const [FontFeature.tabularFigures()],
+            ),
+          ),
+        ),
+        SizedBox(height: dimensions.paddingLarge),
+        Text(
+          loc.walletTopUpQrLabel,
+          style: theme.textTheme.titleSmall,
+        ),
+        const SizedBox(height: 8),
+        Container(
+          padding: EdgeInsets.all(dimensions.paddingMedium),
+          decoration: BoxDecoration(
+            borderRadius: BorderRadius.circular(dimensions.borderRadiusSmall),
+            border: Border.all(color: theme.colorScheme.outlineVariant),
+            color: theme.colorScheme.surfaceVariant.withOpacity(0.4),
+          ),
+          child: Center(
+            child: QrImageView(
+              data: address,
+              backgroundColor: theme.colorScheme.onSecondary,
+              eyeStyle: QrEyeStyle(
+                eyeShape: QrEyeShape.square,
+                color: theme.colorScheme.onSurface,
+              ),
+              dataModuleStyle: QrDataModuleStyle(
+                dataModuleShape: QrDataModuleShape.square,
+                color: theme.colorScheme.onSurface,
+              ),
+              size: 220,
+            ),
+          ),
+        ),
+      ],
+    );
+  }
+}