ledger top up functionality and few small fixes for project architechture and design

frontend/pweb/lib/models/dashboard/balance_item.dart

@@ -0,0 +1,26 @@
+import 'package:pshared/models/ledger/account.dart';
+import 'package:pshared/models/payment/wallet.dart';
+
+sealed class BalanceItem {
+  const BalanceItem();
+
+  const factory BalanceItem.wallet(Wallet wallet) = WalletBalanceItem;
+  const factory BalanceItem.ledger(LedgerAccount account) = LedgerBalanceItem;
+  const factory BalanceItem.addAction() = AddBalanceActionItem;
+}
+
+final class WalletBalanceItem extends BalanceItem {
+  final Wallet wallet;
+
+  const WalletBalanceItem(this.wallet);
+}
+
+final class LedgerBalanceItem extends BalanceItem {
+  final LedgerAccount account;
+
+  const LedgerBalanceItem(this.account);
+}
+
+final class AddBalanceActionItem extends BalanceItem {
+  const AddBalanceActionItem();
+}

frontend/pweb/lib/models/documents/operation.dart

@@ -1,9 +0,0 @@
-class OperationDocumentRequestModel {
-  final String gatewayService;
-  final String operationRef;
-
-  const OperationDocumentRequestModel({
-    required this.gatewayService,
-    required this.operationRef,
-  });
-}

frontend/pweb/lib/models/payment/payment_state.dart

@@ -1,27 +0,0 @@
-enum PaymentState {
-  success,
-  failed,
-  cancelled,
-  processing,
-  unknown,
-}
-
-PaymentState paymentStateFromRaw(String? raw) {
-  final trimmed = (raw ?? '').trim().toUpperCase();
-  final normalized = trimmed.startsWith('PAYMENT_STATE_')
-      ? trimmed.substring('PAYMENT_STATE_'.length)
-      : trimmed;
-
-  switch (normalized) {
-    case 'SUCCESS':
-      return PaymentState.success;
-    case 'FAILED':
-      return PaymentState.failed;
-    case 'CANCELLED':
-      return PaymentState.cancelled;
-    case 'PROCESSING':
-      return PaymentState.processing;
-    default:
-      return PaymentState.unknown;
-  }
-}

frontend/pweb/lib/models/report/operation/document.dart

@@ -1,9 +0,0 @@
-class OperationDocumentInfo {
-  final String operationRef;
-  final String gatewayService;
-
-  const OperationDocumentInfo({
-    required this.operationRef,
-    required this.gatewayService,
-  });
-}