Added debit settlement amount calculation

frontend/pshared/lib/data/dto/payment/payment_quote.dart

@@ -12,6 +12,7 @@ part 'payment_quote.g.dart';
 class PaymentQuoteDTO {
   final String? quoteRef;
   final MoneyDTO? debitAmount;
+  final MoneyDTO? debitSettlementAmount;
   final MoneyDTO? expectedSettlementAmount;
   final MoneyDTO? expectedFeeTotal;
   final List<FeeLineDTO>? feeLines;
@@ -21,6 +22,7 @@ class PaymentQuoteDTO {
   const PaymentQuoteDTO({
     this.quoteRef,
     this.debitAmount,
+    this.debitSettlementAmount,
     this.expectedSettlementAmount,
     this.expectedFeeTotal,
     this.feeLines,

frontend/pshared/lib/data/mapper/payment/payment_quote.dart

@@ -11,6 +11,7 @@ extension PaymentQuoteDTOMapper on PaymentQuoteDTO {
     quoteRef: quoteRef,
     idempotencyKey: idempotencyKey,
     debitAmount: debitAmount?.toDomain(),
+    debitSettlementAmount: debitSettlementAmount?.toDomain(),
     expectedSettlementAmount: expectedSettlementAmount?.toDomain(),
     expectedFeeTotal: expectedFeeTotal?.toDomain(),
     feeLines: feeLines?.map((line) => line.toDomain()).toList(),
@@ -23,6 +24,7 @@ extension PaymentQuoteMapper on PaymentQuote {
   PaymentQuoteDTO toDTO() => PaymentQuoteDTO(
     quoteRef: quoteRef,
     debitAmount: debitAmount?.toDTO(),
+    debitSettlementAmount: debitSettlementAmount?.toDTO(),
     expectedSettlementAmount: expectedSettlementAmount?.toDTO(),
     expectedFeeTotal: expectedFeeTotal?.toDTO(),
     feeLines: feeLines?.map((line) => line.toDTO()).toList(),

frontend/pshared/lib/models/payment/quote/quote.dart

@@ -8,6 +8,7 @@ class PaymentQuote {
   final String? quoteRef;
   final String? idempotencyKey;
   final Money? debitAmount;
+  final Money? debitSettlementAmount;
   final Money? expectedSettlementAmount;
   final Money? expectedFeeTotal;
   final List<FeeLine>? feeLines;
@@ -18,6 +19,7 @@ class PaymentQuote {
     required this.quoteRef,
     required this.idempotencyKey,
     required this.debitAmount,
+    required this.debitSettlementAmount,
     required this.expectedSettlementAmount,
     required this.expectedFeeTotal,
     required this.feeLines,