Corrected variables declaration

lib/pages/add_distributor_page.dart

@@ -26,7 +26,7 @@ class _AddDistributorPageState extends State<AddDistributorPage> {
   final _addressController = TextEditingController();
   final _refDistributors = RefDistributors();
 
-  late bool _isLoading = false;
+  bool _isLoading = false;
 
   Future<void> _getDistributorListCache() async {
     final distributorList = await _refDistributors.getList();

lib/pages/add_generics_page.dart

@@ -30,12 +30,12 @@ class _AddGenericsPageState extends State<AddGenericsPage> {
   final _nameController = TextEditingController();
   final _formKey = GlobalKey<FormState>();
 
-  late bool _isLoading = false;
+  bool _isLoading = false;
   // late final List _categoryListCache = [];
 
-  late List _categoryList = [];
-  late String _selectedCategory = '';
-  late String _categoryUUID = '';
+  late List _categoryList;
+  late String _selectedCategory;
+  late String _categoryUUID;
 
   Future<void> _getGenericListCache() async {
     final genericNameList = await _refGenericNames.getList();

lib/pages/add_manufacturer_page.dart

@@ -26,7 +26,7 @@ class _AddManufacturerPageState extends State<AddManufacturerPage> {
   final _addressController = TextEditingController();
   final _refManufacturers = RefManufacturers();
 
-  late bool _isLoading = false;
+  bool _isLoading = false;
 
   Future<void> _getManufacturerListCache() async {
     final manufacturerList = await _refManufacturers.getList();

lib/pages/add_medicine_page.dart

@@ -55,23 +55,24 @@ class _AddMedicinePageState extends State<AddMedicinePage> {
   final _nameController = TextEditingController();
   final _barcodeController = TextEditingController();
 
-  late bool _isLoading = false;
-  late List _genericNameList = [];
-  late String _selectedGeneric = '';
-  late String _selectedCategory = '';
-  late List _typeList = [];
-  late String _selectedType = '';
-  late List _manufacturerList = [];
-  late List _distributorList = [];
-  late List _supplierList = [];
-  late String _selectedManufacturer = '';
-  late String _selectedDistributor = '';
-  late String _selectedSupplier = '';
-  late String uuid = '';
-  late bool imageUploaded = false;
-  late String imageUrl = '';
-  late bool uploaded = false;
-  late String imageUUID = '';
+  bool _isLoading = false;
+  bool imageUploaded = false;
+  bool uploaded = false;
+
+  late List _genericNameList;
+  late String _selectedGeneric;
+  late String _selectedCategory;
+  late List _typeList;
+  late String _selectedType;
+  late List _manufacturerList;
+  late List _distributorList;
+  late List _supplierList;
+  late String _selectedManufacturer;
+  late String _selectedDistributor;
+  late String _selectedSupplier;
+  late String uuid;
+  late String imageUrl;
+  late String imageUUID;
 
   Future<void> _getGenerics() async {
     _genericNameList = await _refGenericNames.getList();

lib/pages/add_stock_page.dart

@@ -34,11 +34,12 @@ class _AddStockPageState extends State<AddStockPage> with WidgetsBindingObserver
   final _priceController = TextEditingController();
   final _stocks = Stocks();
 
-  late bool _isLoading = false;
-  late List _medicineList = [];
-  late String _selectedMedicine = '';
-  late DateTime selectedDate = DateTime.now();
-  late String barcode = '';
+  late List _medicineList;
+  late String _selectedMedicine;
+  late String barcode;
+
+  bool _isLoading = false;
+  DateTime selectedDate = DateTime.now();
 
   final sampleBarcode = '8992185411017';
 

lib/pages/add_supplier_page.dart

@@ -25,7 +25,7 @@ class _AddSupplierPageState extends State<AddSupplierPage> {
   final _nameController = TextEditingController();
   final _refSuppliers = RefSuppliers();
 
-  late bool _isLoading = false;
+  bool _isLoading = false;
 
   Future<void> _getSupplierListCache() async {
     final supplierList = await _refSuppliers.getList();

lib/pages/delete_stock_page.dart

@@ -29,12 +29,13 @@ class _DeleteStockPageState extends State<DeleteStockPage> {
   final _stocks = Stocks();
   final _quantityController = TextEditingController();
 
-  late List _stockList = [];
-  late String _selectedStock = '';
-  late bool _aboveQuantity = false;
-  late bool _noStock = false;
-  late double _serverQuantity = 0;
-  late String _selectedUUID = '';
+  bool _aboveQuantity = false;
+  bool _noStock = false;
+  double _serverQuantity = 0;
+
+  late List _stockList;
+  late String _selectedStock;
+  late String _selectedUUID;
 
   void _getStocks() async {
     _stockList = await _stocks.getList();

lib/pages/list_stocks_page.dart

@@ -18,8 +18,8 @@ class ListStocksPage extends StatefulWidget {
 class _ListStocksPageState extends State<ListStocksPage> {
   final _stocks = Stocks();
 
-  late List _stockList = [];
   bool _isLoading = false;
+  late List _stockList;
 
   List<DataRow> _createRows() {
     final today = DateTime.now().toUtc();

lib/pages/login_page.dart

@@ -26,8 +26,8 @@ class _LoginPageState extends State<LoginPage> {
   final _passwordController = TextEditingController();
   final FocusNode _focusNode = FocusNode();
 
-  late bool _isLoading = false;
-  late double containerHeight = 0.35;
+  bool _isLoading = false;
+  double containerHeight = 0.35;
 
   void _signIn() async {
     final email = _emailController.text;

lib/pages/main_page.dart

@@ -45,7 +45,7 @@ class _MainPageState extends State<MainPage> {
   final _refDistributors = RefDistributors();
   final _refSuppliers = RefSuppliers();
 
-  late bool _isLoading = false;
+  bool _isLoading = false;
 
   void signOut() async {
     try {

lib/pages/register_page.dart

@@ -25,8 +25,8 @@ class _RegisterPageState extends State<RegisterPage> {
   final _confirmPasswordController = TextEditingController();
   final FocusNode _focusNode = FocusNode();
 
-  late bool _isLoading = false;
-  late double containerHeight = 0.44;
+  bool _isLoading = false;
+  double containerHeight = 0.44;
 
   Future<void> _signUp() async {
     final email = _emailController.text;