multiple payout page and small fixes

frontend/pweb/lib/models/dashboard_payment_mode.dart

@@ -0,0 +1 @@
+enum DashboardPayoutMode { single, multiple }

frontend/pweb/lib/models/summary_values.dart

@@ -0,0 +1,13 @@
+class PaymentSummaryValues {
+  final String sentAmount;
+  final String fee;
+  final String recipientReceives;
+  final String total;
+
+  const PaymentSummaryValues({
+    required this.sentAmount,
+    required this.fee,
+    required this.recipientReceives,
+    required this.total,
+  });
+}