add pagination for invoice and update ui for material 3

lib/pages/package/model/package_model.dart

@@ -21,30 +21,21 @@ class PackageModel extends BaseModel {
   PaginatorListener<Package>? activePackages;
 
   bool isLoading = false;
-  int _menuSelectedIndex = 1;
+  int selectedIndex = 1;
 
-  set menuSelectedIndex(int index) {
-    _menuSelectedIndex = index;
-
-    _loadPaginationPackages(_menuSelectedIndex == 2);
-    _loadPaginationCustomerPackages(_menuSelectedIndex == 2);
-
-    notifyListeners();
-  }
-
-  int get menuSelectedIndex => _menuSelectedIndex;
-
-  void privilegeChanged() {
-    if (user != null) {
-      _initData();
+  initData(int index, bool isCustomer) {
+    selectedIndex = index;
+    if (isCustomer) {
+      _loadPaginationCustomerPackages(selectedIndex == 2);
+    } else {
+      _loadPaginationPackages(selectedIndex == 2);
     }
   }
 
-  Future<void> _initData() async {
-    _menuSelectedIndex = 1;
-    _loadPaginationPackages(_menuSelectedIndex == 2);
-    _loadPaginationCustomerPackages(_menuSelectedIndex == 2);
-    _loadPaginationActivePackages();
+  void privilegeChanged() {
+    if (user != null) {
+      _loadPaginationActivePackages();
+    }
   }
 
   @override
@@ -54,6 +45,16 @@ class PackageModel extends BaseModel {
     if (activePackages != null) activePackages!.close();
   }
 
+  onChanged(int index, bool isCustomer) {
+    selectedIndex = index;
+    if (isCustomer) {
+      _loadPaginationCustomerPackages(selectedIndex == 2);
+    } else {
+      _loadPaginationPackages(selectedIndex == 2);
+    }
+    notifyListeners();
+  }
+
   _loadPaginationPackages(bool isDelivered) {
     if (user == null) return;
     if (!((user!.hasPackages() ||
@@ -78,7 +79,6 @@ class PackageModel extends BaseModel {
   _loadPaginationCustomerPackages(bool isDelivered) {
     if (user == null) return;
     String path = "/$packages_collection";
-
     Query col = FirebaseFirestore.instance
         .collection(path)
         .where("is_delivered", isEqualTo: isDelivered)