refinements

lib/features/tickets/models/ticket_model.dart

@@ -203,6 +203,7 @@ class TicketModel extends Equatable {
     TicketType? ticketType,
     TicketStatus? ticketStatus,
     DateTime? estimatedDeliveryAt,
+    bool clearEstimatedDelivery = false,
     TicketResult? ticketResult,
     String? resolutionNotes,
     String? shippingDocumentId,
@@ -242,7 +243,9 @@ class TicketModel extends Equatable {
       hasCourtesyDevice: hasCourtesyDevice ?? this.hasCourtesyDevice,
       ticketType: ticketType ?? this.ticketType,
       ticketStatus: ticketStatus ?? this.ticketStatus,
-      estimatedDeliveryAt: estimatedDeliveryAt ?? this.estimatedDeliveryAt,
+      estimatedDeliveryAt: clearEstimatedDelivery
+          ? null
+          : (estimatedDeliveryAt ?? this.estimatedDeliveryAt),
       ticketResult: ticketResult ?? this.ticketResult,
       resolutionNotes: resolutionNotes ?? this.resolutionNotes,
       shippingDocumentId: shippingDocumentId ?? this.shippingDocumentId,