Fixed compilation

frontend/pshared/lib/models/ledger/account.dart

@@ -1,4 +1,5 @@
 import 'package:pshared/models/describable.dart';
+import 'package:pshared/models/ledger/balance.dart';
 
 
 class LedgerAccount implements Describable {
@@ -15,6 +16,7 @@ class LedgerAccount implements Describable {
   final DateTime? createdAt;
   final DateTime? updatedAt;
   final Describable describable;
+  final LedgerBalance? balance;
 
   @override
   String get name => describable.name;
@@ -36,6 +38,7 @@ class LedgerAccount implements Describable {
     this.createdAt,
     this.updatedAt,
     required this.describable,
+    this.balance,
   });
 
   LedgerAccount copyWith({
@@ -54,5 +57,6 @@ class LedgerAccount implements Describable {
     createdAt: createdAt,
     updatedAt: updatedAt,
     describable: describable ?? this.describable,
+    balance: balance,
   );
 }