small fixes

frontend/pweb/lib/controllers/multi_quotation.dart

@@ -0,0 +1,70 @@
+import 'package:flutter/foundation.dart';
+
+import 'package:pshared/provider/payment/multiple/quotation.dart';
+
+import 'package:pweb/providers/quotation/auto_refresh.dart';
+
+
+class MultiQuotationController extends ChangeNotifier {
+  static const Duration _autoRefreshLead = Duration(seconds: 5);
+
+  MultiQuotationProvider? _quotation;
+  final QuotationAutoRefreshController _autoRefreshController =
+      QuotationAutoRefreshController();
+
+  void update(MultiQuotationProvider quotation) {
+    if (identical(_quotation, quotation)) return;
+    _quotation?.removeListener(_handleQuotationChanged);
+    _quotation = quotation;
+    _quotation?.addListener(_handleQuotationChanged);
+    _handleQuotationChanged();
+  }
+
+  bool get isLoading => _quotation?.isLoading ?? false;
+  Exception? get error => _quotation?.error;
+  bool get canRefresh => _quotation?.canRefresh ?? false;
+  bool get isReady => _quotation?.isReady ?? false;
+
+  DateTime? get quoteExpiresAt => _quotation?.quoteExpiresAt;
+
+  void refreshQuotation() {
+    _quotation?.refreshQuotation();
+  }
+
+  void _handleQuotationChanged() {
+    _syncAutoRefresh();
+    notifyListeners();
+  }
+
+  void _syncAutoRefresh() {
+    final quotation = _quotation;
+    if (quotation == null) {
+      _autoRefreshController.reset();
+      return;
+    }
+
+    final expiresAt = quoteExpiresAt;
+    final scheduledAt = expiresAt == null
+        ? null
+        : expiresAt.subtract(_autoRefreshLead);
+
+    _autoRefreshController.setEnabled(true);
+    _autoRefreshController.sync(
+      isLoading: quotation.isLoading,
+      canRefresh: quotation.canRefresh,
+      expiresAt: scheduledAt,
+      onRefresh: _refreshQuotation,
+    );
+  }
+
+  Future<void> _refreshQuotation() async {
+    await _quotation?.refreshQuotation();
+  }
+
+  @override
+  void dispose() {
+    _quotation?.removeListener(_handleQuotationChanged);
+    _autoRefreshController.dispose();
+    super.dispose();
+  }
+}