update cargo type input, add package count and carton count for shipment info

lib/pages/carton/carton_package_editor.dart

@@ -47,6 +47,7 @@ class _CartonPackageEditorState extends State<CartonPackageEditor> {
 
   List<CargoType> _cargoTypes = [];
   List<CargoType> _surchareItems = [];
+  double _totalWeight = 0;
 
   int currentStep = 0;
   double _length = 0;
@@ -89,6 +90,7 @@ class _CartonPackageEditorState extends State<CartonPackageEditor> {
         widget.carton.cargoTypes.map((e) => e.cloneForCarton()).toList();
     _surchareItems =
         widget.carton.surchareItems.map((e) => e.cloneForSurchage()).toList();
+    _totalWeight = _cargoTypes.fold(0, (sum, value) => sum + value.weight);
 
     // check carton size type
     List<CartonSize> cartonSizes = context.read<CartonSizeModel>().cartonSizes;
@@ -252,6 +254,7 @@ class _CartonPackageEditorState extends State<CartonPackageEditor> {
           consignee: _consignee!,
           cargoTypes: _cargoTypes,
           surchargeItems: _surchareItems,
+          totalWeight: _totalWeight,
           onContinue: (cargoTypes, customDuties) {
             setState(() {
               _cargoTypes = List.from(cargoTypes);
@@ -259,8 +262,9 @@ class _CartonPackageEditorState extends State<CartonPackageEditor> {
               currentStep += 1;
             });
           },
-          onPrevious: (cargoTypes, customDuties) {
+          onPrevious: (cargoTypes, customDuties, totalWeight) {
             setState(() {
+              _totalWeight = totalWeight;
               _cargoTypes = List.from(cargoTypes);
               _surchareItems = List.from(customDuties);
               currentStep -= 1;