Added quote expiry-aware flows with auto-refresh

frontend/pweb/lib/pages/dashboard/payouts/amount.dart

@@ -3,6 +3,7 @@ import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 
 import 'package:pshared/provider/payment/amount.dart';
+import 'package:pshared/provider/payment/quotation.dart';
 import 'package:pshared/utils/currency.dart';
 
 import 'package:pweb/generated/i18n/app_localizations.dart';
@@ -17,6 +18,7 @@ class PaymentAmountWidget extends StatefulWidget {
 
 class _PaymentAmountWidgetState extends State<PaymentAmountWidget> {
   late final TextEditingController _controller;
+  late final FocusNode _focusNode;
   bool _isSyncingText = false;
 
   @override
@@ -24,10 +26,13 @@ class _PaymentAmountWidgetState extends State<PaymentAmountWidget> {
     super.initState();
     final initialAmount = context.read<PaymentAmountProvider>().amount;
     _controller = TextEditingController(text: amountToString(initialAmount));
+    _focusNode = FocusNode()..addListener(_handleFocusChange);
   }
 
   @override
   void dispose() {
+    _focusNode.removeListener(_handleFocusChange);
+    _focusNode.dispose();
     _controller.dispose();
     super.dispose();
   }
@@ -56,6 +61,14 @@ class _PaymentAmountWidgetState extends State<PaymentAmountWidget> {
     }
   }
 
+  void _handleFocusChange() {
+    if (_focusNode.hasFocus) return;
+    final quotationProvider = context.read<QuotationProvider>();
+    if (quotationProvider.canRequestQuote) {
+      quotationProvider.refreshNow(force: false);
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     final amount = context.select<PaymentAmountProvider, double>((provider) => provider.amount);
@@ -63,6 +76,7 @@ class _PaymentAmountWidgetState extends State<PaymentAmountWidget> {
 
     return TextField(
       controller: _controller,
+      focusNode: _focusNode,
       keyboardType: const TextInputType.numberWithOptions(decimal: true),
       decoration: InputDecoration(
         labelText: AppLocalizations.of(context)!.amount,