TF-1231 When remove Subject in AdvancedSearch, filter is not update because it is empty

lib/features/mailbox_dashboard/presentation/controller/advanced_filter_controller.dart

@@ -1,5 +1,6 @@
 import 'package:collection/collection.dart';
 import 'package:core/core.dart';
+import 'package:dartz/dartz.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_date_range_picker/multiple_view_date_range_picker.dart';
 import 'package:get/get.dart';
@@ -36,18 +37,14 @@ class AdvancedFilterController extends BaseController {
   final lastTextForm = ''.obs;
   final lastTextTo = ''.obs;
   TextEditingController subjectFilterInputController = TextEditingController();
-  TextEditingController hasKeyWordFilterInputController =
-      TextEditingController();
-  TextEditingController notKeyWordFilterInputController =
-      TextEditingController();
+  TextEditingController hasKeyWordFilterInputController = TextEditingController();
+  TextEditingController notKeyWordFilterInputController = TextEditingController();
   TextEditingController dateFilterInputController = TextEditingController();
   TextEditingController mailBoxFilterInputController = TextEditingController();
-  ContactSuggestionSource _contactSuggestionSource =
-      ContactSuggestionSource.tMailContact;
+  ContactSuggestionSource _contactSuggestionSource = ContactSuggestionSource.tMailContact;
 
   final SearchController searchController = Get.find<SearchController>();
-  final MailboxDashBoardController _mailboxDashBoardController =
-      Get.find<MailboxDashBoardController>();
+  final MailboxDashBoardController _mailboxDashBoardController = Get.find<MailboxDashBoardController>();
   final _appToast = Get.find<AppToast>();
   final _imagePaths = Get.find<ImagePaths>();
 
@@ -129,8 +126,7 @@ class AdvancedFilterController extends BaseController {
     }
 
     searchController.updateFilterEmail(
-      subject:
-          StringConvert.writeEmptyToNull(subjectFilterInputController.text),
+      subjectOption: optionOf(subjectFilterInputController.text),
       emailReceiveTimeType: dateFilterSelectedFormAdvancedSearch.value,
       hasAttachment: hasAttachment.value,
       endDate: _endDate.toUTCDate(),

lib/features/mailbox_dashboard/presentation/controller/search_controller.dart

@@ -1,6 +1,7 @@
 import 'dart:async';
 
 import 'package:core/core.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';
@@ -119,7 +120,7 @@ class SearchController extends BaseController {
     Set<String>? from,
     Set<String>? to,
     SearchQuery? text,
-    String? subject,
+    Option<String>? subjectOption,
     Set<String>? notKeyword,
     PresentationMailbox? mailbox,
     EmailReceiveTimeType? emailReceiveTimeType,
@@ -132,7 +133,7 @@ class SearchController extends BaseController {
       from: from,
       to: to,
       text: text,
-      subject: subject,
+      subjectOption: subjectOption,
       notKeyword: notKeyword,
       mailbox: mailbox,
       emailReceiveTimeType: emailReceiveTimeType,

lib/features/mailbox_dashboard/presentation/model/search/search_email_filter.dart

@@ -1,3 +1,4 @@
+import 'package:dartz/dartz.dart';
 import 'package:equatable/equatable.dart';
 import 'package:jmap_dart_client/jmap/core/filter/filter.dart';
 import 'package:jmap_dart_client/jmap/core/filter/filter_operator.dart';
@@ -46,7 +47,7 @@ class SearchEmailFilter with EquatableMixin {
     Set<String>? from,
     Set<String>? to,
     SearchQuery? text,
-    String? subject,
+    Option<String>? subjectOption,
     Set<String>? notKeyword,
     PresentationMailbox? mailbox,
     EmailReceiveTimeType? emailReceiveTimeType,
@@ -59,7 +60,7 @@ class SearchEmailFilter with EquatableMixin {
       from: from ?? this.from,
       to: to ?? this.to,
       text: text ?? this.text,
-      subject: subject ?? this.subject,
+      subject: _getOptionParam(subjectOption, subject),
       notKeyword: notKeyword ?? this.notKeyword,
       mailbox: mailbox ?? this.mailbox,
       emailReceiveTimeType: emailReceiveTimeType ?? this.emailReceiveTimeType,
@@ -70,6 +71,14 @@ class SearchEmailFilter with EquatableMixin {
     );
   }
 
+  T? _getOptionParam<T>(Option<T?>? option, T? defaultValue) {
+    if (option != null) {
+      return option.toNullable();
+    } else {
+      return defaultValue;
+    }
+  }
+
   Filter? mappingToEmailFilterCondition({EmailFilterCondition? moreFilterCondition}) {
     final emailEmailFilterConditionShared = EmailFilterCondition(
       text: text?.value.trim().isNotEmpty == true