TF-4004 Add loading bar for email rule filter view

lib/features/manage_account/domain/state/get_all_rules_state.dart

@@ -2,6 +2,8 @@ import 'package:core/presentation/state/failure.dart';
 import 'package:core/presentation/state/success.dart';
 import 'package:rule_filter/rule_filter/tmail_rule.dart';
 
+class GettingAllRules extends LoadingState {}
+
 class GetAllRulesSuccess extends UIState {
   final List<TMailRule>? rules;
 

lib/features/manage_account/domain/usecases/get_all_rules_interactor.dart

@@ -13,7 +13,7 @@ class GetAllRulesInteractor {
 
   Stream<Either<Failure, Success>> execute(AccountId accountId) async* {
     try {
-      yield Right<Failure, Success>(LoadingState());
+      yield Right(GettingAllRules());
       final rulesResponse = await _ruleFilterRepository.getAllTMailRule(accountId);
       yield Right(GetAllRulesSuccess(rulesResponse));
     } catch (exception) {

lib/features/manage_account/presentation/email_rules/email_rules_controller.dart

@@ -1,6 +1,8 @@
+import 'package:core/presentation/state/failure.dart';
 import 'package:core/presentation/state/success.dart';
 import 'package:core/utils/app_logger.dart';
 import 'package:core/utils/platform_info.dart';
+import 'package:dartz/dartz.dart';
 import 'package:flutter/material.dart';
 import 'package:get/get.dart';
 import 'package:jmap_dart_client/jmap/account_id.dart';
@@ -39,6 +41,11 @@ class EmailRulesController extends BaseController {
 
   final listEmailRule = <TMailRule>[].obs;
 
+  bool get isLoading => viewState.value.fold(
+    (failure) => false,
+    (success) => success is GettingAllRules,
+  );
+
   @override
   void onInit() {
     super.onInit();
@@ -75,6 +82,15 @@ class EmailRulesController extends BaseController {
     }
   }
 
+  @override
+  void handleFailureViewState(Failure failure) {
+    if (failure is GetAllRulesFailure) {
+      listEmailRule.clear();
+    } else {
+      super.handleFailureViewState(failure);
+    }
+  }
+
   Future<void> goToCreateNewRule() async {
     final accountId = _accountDashBoardController.accountId.value;
     final session = _accountDashBoardController.sessionCurrent;
@@ -216,6 +232,8 @@ class EmailRulesController extends BaseController {
   void _getAllRules() {
     if (_getAllRulesInteractor != null) {
       consumeState(_getAllRulesInteractor!.execute(_accountDashBoardController.accountId.value!));
+    } else {
+      consumeState(Stream.value(Left(GetAllRulesFailure(null))));
     }
   }
 

lib/features/manage_account/presentation/email_rules/email_rules_view.dart

@@ -1,6 +1,7 @@
 import 'package:core/presentation/utils/theme_utils.dart';
 import 'package:flutter/material.dart';
 import 'package:get/get.dart';
+import 'package:tmail_ui_user/features/base/mixin/app_loader_mixin.dart';
 import 'package:tmail_ui_user/features/manage_account/presentation/base/setting_detail_view_builder.dart';
 import 'package:tmail_ui_user/features/manage_account/presentation/email_rules/email_rules_controller.dart';
 import 'package:tmail_ui_user/features/manage_account/presentation/email_rules/widgets/add_rule_button_widget.dart';
@@ -13,7 +14,8 @@ import 'package:tmail_ui_user/features/manage_account/presentation/model/email_r
 import 'package:tmail_ui_user/features/manage_account/presentation/widgets/setting_explanation_widget.dart';
 import 'package:tmail_ui_user/features/manage_account/presentation/widgets/setting_header_widget.dart';
 
-class EmailRulesView extends GetWidget<EmailRulesController> {
+class EmailRulesView extends GetWidget<EmailRulesController>
+    with AppLoaderMixin {
   const EmailRulesView({Key? key}) : super(key: key);
 
   @override
@@ -92,13 +94,25 @@ class EmailRulesView extends GetWidget<EmailRulesController> {
                 ),
               ),
             ),
+            Obx(
+              () => controller.isLoading
+                  ? Padding(
+                      padding: const EdgeInsets.only(top: 8.0),
+                      child: loadingWidget,
+                    )
+                  : const SizedBox.shrink(),
+            ),
             Obx(() {
               if (controller.listEmailRule.isEmpty) {
-                return NoRulesWidget(
-                  imagePaths: controller.imagePaths,
-                  responsiveUtils: controller.responsiveUtils,
-                  onAddRuleAction: controller.goToCreateNewRule,
-                );
+                if (controller.isLoading) {
+                  return const SizedBox.shrink();
+                } else {
+                  return NoRulesWidget(
+                    imagePaths: controller.imagePaths,
+                    responsiveUtils: controller.responsiveUtils,
+                    onAddRuleAction: controller.goToCreateNewRule,
+                  );
+                }
               } else {
                 return Expanded(
                   child: ListEmailRulesWidget(