Revert the project to the previous structure with applying null safety

lib/views/pages/login.dart

@@ -15,9 +15,10 @@ import '../widgets/buttons/app_button.dart';
 import '../widgets/loaders/loading_manager.dart';
 import 'user/land_page.dart';
 
-
 class Login extends StatefulWidget {
-  static final String id = "/login";
+  static const String id = "/login";
+
+  const Login({super.key});
 
   @override
   _LoginState createState() => _LoginState();
@@ -26,9 +27,9 @@ class Login extends StatefulWidget {
 class _LoginState extends State<Login> {
   UserProvider? _userProvider;
   SettingProvider? _settingProvider;
-  User _user = User();
+  final User _user = User();
   bool _obscurePassword = true;
-  bool _firstTime = true;
+  final bool _firstTime = true;
   late double _height;
   late double _width;
   late String _payload;
@@ -41,12 +42,13 @@ class _LoginState extends State<Login> {
     _settingProvider = Provider.of<SettingProvider>(context);
     _height = MediaQuery.of(context).size.height;
     _width = MediaQuery.of(context).size.width;
-    Subtitle? _subtitle = AppLocalization.of(context)?.subtitle;
+    Subtitle? subtitle = AppLocalization.of(context)?.subtitle;
     return Scaffold(
       key: _scaffoldKey,
       body: SafeArea(
         child: LoadingManager(
-          isLoading: (_userProvider?.isLoading??false) || !(_settingProvider?.isLoaded??false),
+          isLoading: (_userProvider?.isLoading ?? false) ||
+              !(_settingProvider?.isLoaded ?? false),
           isFailedLoading: false,
           stateCode: 200,
           onRefresh: () async {},
@@ -65,37 +67,44 @@ class _LoginState extends State<Login> {
                     child: Image(
                       height: _height / 6,
                       fit: BoxFit.contain,
-                      image: AssetImage("assets/images/logo.png"),
+                      image: const AssetImage("assets/images/logo.png"),
                     ),
                   ),
                   Padding(
-                    padding: EdgeInsets.symmetric(horizontal: 24 * AppStyle.getScaleFactor(context), vertical: 24 * AppStyle.getScaleFactor(context)),
+                    padding: EdgeInsets.symmetric(
+                        horizontal: 24 * AppStyle.getScaleFactor(context),
+                        vertical: 24 * AppStyle.getScaleFactor(context)),
                     child: Column(
                       children: [
                         SizedBox(
                           height: 24 * AppStyle.getScaleFactor(context),
                         ),
                         ATextFormField(
-                          initialValue: _user?.userName??"",
-                          hintText: _subtitle?.name??"",
+                          initialValue: _user.userName ?? "",
+                          hintText: subtitle?.name ?? "",
                           textAlign: TextAlign.left,
                           style: Theme.of(context).textTheme.bodyText1,
                           prefixIconData: Icons.account_circle,
-                          validator: (value) => Validator.hasValue(value!) ? '' : _subtitle?.nameValidateMessage??"",
+                          validator: (value) => Validator.hasValue(value!)
+                              ? ''
+                              : subtitle?.nameValidateMessage ?? "",
                           textInputType: TextInputType.name,
                           onSaved: (value) {
                             _user.userName = value!;
                           },
                         ),
-                        SizedBox(height: 12),
+                        const SizedBox(height: 12),
                         ATextFormField(
                           initialValue: _user.password,
-                          hintText: _subtitle?.password??"",
+                          hintText: subtitle?.password ?? "",
                           obscureText: _obscurePassword,
                           style: Theme.of(context).textTheme.bodyText1,
                           prefixIconData: Icons.vpn_key_sharp,
                           textAlign: TextAlign.left,
-                          validator: (value) => Validator.isValidPassword(value!) ? '' : _subtitle?.passwordValidateMessage??"",
+                          validator: (value) =>
+                              Validator.isValidPassword(value!)
+                                  ? ''
+                                  : subtitle?.passwordValidateMessage ?? "",
                           showPassword: () {
                             _obscurePassword = !_obscurePassword;
                             setState(() {});
@@ -108,23 +117,33 @@ class _LoginState extends State<Login> {
                           height: 32 * AppStyle.getScaleFactor(context),
                         ),
                         AButton(
-                          text: _subtitle?.signIn??"",
+                          text: subtitle?.signIn ?? "",
                           onPressed: () async {
-                            if (!(_formKey.currentState?.validate()??false)) return;
+                            if (!(_formKey.currentState?.validate() ?? false))
+                              return;
                             _formKey.currentState?.save();
                             int? status = await _userProvider?.login(
                               user: _user,
-                              host: _settingProvider?.host??"",
+                              host: _settingProvider?.host ?? "",
                             );
-                            if (status !=null && status >= 200 && status < 300) {
-                              _settingProvider?.setUser(_userProvider?.user??User());
-                              if (_userProvider?.user?.isActive??false)
+                            if (status != null &&
+                                status >= 200 &&
+                                status < 300) {
+                              _settingProvider
+                                  ?.setUser(_userProvider?.user ?? User());
+                              if (_userProvider?.user?.isActive ?? false) {
                                 Navigator.of(context).pushNamed(LandPage.id);
-                              else
-                                Fluttertoast.showToast(msg: _subtitle?.activationAlert??"");
+                              } else {
+                                Fluttertoast.showToast(
+                                    msg: subtitle?.activationAlert ?? "");
+                              }
                             } else {
-                              String errorMessage = status == 400 ? _subtitle?.wrongEmailOrPassword??"" : HttpStatusManger.getStatusMessage(status: status, subtitle: _subtitle);
-                              ScaffoldMessenger.of(context).showSnackBar(SnackBar(
+                              String errorMessage = status == 400
+                                  ? subtitle?.wrongEmailOrPassword ?? ""
+                                  : HttpStatusManger.getStatusMessage(
+                                      status: status, subtitle: subtitle);
+                              ScaffoldMessenger.of(context)
+                                  .showSnackBar(SnackBar(
                                 content: Text(errorMessage),
                               ));
                             }

pubspec.yaml

@@ -89,7 +89,7 @@ flutter:
   assets:
     - assets/
     - assets/images/
-    - assets/translations/
+    - assets/subtitles/
     - assets/rives/
   fonts:
     - family: Swiss