small fixes

frontend/pshared/lib/data/mapper/wallet/ui.dart

@@ -1,13 +1,16 @@
 import 'package:pshared/models/wallet/wallet.dart' as domain;
 import 'package:pshared/models/payment/wallet.dart';
 import 'package:pshared/utils/currency.dart';
+import 'package:pshared/utils/money.dart';
 
 
 extension WalletUiMapper on domain.WalletModel {
   Wallet toUi() => Wallet(
     id: walletRef,
     walletUserID: walletRef,
-    balance: double.tryParse(availableMoney?.amount ?? balance?.available?.amount ?? '0') ?? 0,
+    balance: parseMoneyAmount(
+      availableMoney?.amount ?? balance?.available?.amount,
+    ),
     currency: currencyStringToCode(asset.tokenSymbol),
     calculatedAt: balance?.calculatedAt ?? DateTime.now(),
     depositAddress: depositAddress,

frontend/pshared/lib/service/payment/wallets.dart

@@ -3,6 +3,7 @@ import 'package:pshared/models/describable.dart';
 import 'package:pshared/models/payment/wallet.dart';
 import 'package:pshared/models/wallet/chain_asset.dart';
 import 'package:pshared/service/wallet.dart' as shared_wallet_service;
+import 'package:pshared/utils/money.dart';
 
 
 abstract class WalletsService {
@@ -29,8 +30,7 @@ class ApiWalletsService implements WalletsService {
       organizationRef: organizationRef,
       walletRef: walletRef,
     );
-    final amount = balance.available?.amount;
-    return amount == null ? 0 : double.tryParse(amount) ?? 0;
+    return parseMoneyAmount(balance.available?.amount);
   }
 
   @override

frontend/pshared/lib/utils/money.dart

@@ -0,0 +1,12 @@
+import 'package:pshared/models/money.dart';
+
+
+double parseMoneyAmount(String? raw, {double fallback = 0}) {
+  final trimmed = raw?.trim();
+  if (trimmed == null || trimmed.isEmpty) return fallback;
+  return double.tryParse(trimmed) ?? fallback;
+}
+
+extension MoneyAmountX on Money {
+  double get amountValue => parseMoneyAmount(amount);
+}