Top Up Balance logic and Added fixes for routing

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

@@ -0,0 +1,60 @@
+import 'package:flutter/material.dart';
+
+import 'package:pweb/pages/wallet_top_up/address_block.dart';
+import 'package:pweb/utils/dimensions.dart';
+
+import 'package:pweb/generated/i18n/app_localizations.dart';
+
+
+class WalletTopUpDetails extends StatelessWidget {
+  final String? address;
+  final AppDimensions dimensions;
+
+  const WalletTopUpDetails({
+    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: [
+        Text(
+          loc.walletTopUpDetailsTitle,
+          style: theme.textTheme.titleMedium,
+        ),
+        const SizedBox(height: 6),
+        Text(
+          loc.walletTopUpDescription,
+          style: theme.textTheme.bodyMedium?.copyWith(
+            color: theme.colorScheme.onSurfaceVariant,
+          ),
+        ),
+        SizedBox(height: dimensions.paddingLarge),
+        if (address == null || address!.isEmpty)
+          Text(
+            loc.walletTopUpUnavailable,
+            style: theme.textTheme.bodyMedium,
+          )
+        else ...[
+          WalletTopUpAddressBlock(
+            address: address!,
+            dimensions: dimensions,
+          ),
+          SizedBox(height: dimensions.paddingLarge),
+          Text(
+            loc.walletTopUpHint,
+            style: theme.textTheme.bodySmall?.copyWith(
+              color: theme.colorScheme.onSurfaceVariant,
+            ),
+          ),
+        ],
+      ],
+    );
+  }
+}