hotfix(ui): Show label search filter only when label list is not empty

lib/features/email/presentation/utils/email_action_reactor/email_action_reactor.dart

@@ -507,7 +507,7 @@ class EmailActionReactor {
       if (EmailUtils.isReplyToListEnabled(presentationEmail.listPost ?? '') &&
           additionalActions.contains(EmailActionType.replyToList))
         EmailActionType.replyToList,
-      if (isLabelAvailable)
+      if (isLabelAvailable && labels?.isNotEmpty == true)
         EmailActionType.labelAs,
       if (PlatformInfo.isWeb &&
           PlatformInfo.isCanvasKit &&

lib/features/mailbox_dashboard/presentation/mailbox_dashboard_view_web.dart

@@ -650,6 +650,7 @@ class MailboxDashBoardView extends BaseMailboxDashBoardView {
       final isThreadRoute =
           controller.dashboardRoute.value == DashboardRoutes.thread;
       final isLabelAvailable = controller.isLabelAvailable;
+      final labelList = controller.labelController.labels;
 
       if (isSearchEmailRunning && isThreadRoute) {
         return Padding(
@@ -678,7 +679,7 @@ class MailboxDashBoardView extends BaseMailboxDashBoardView {
                       children: [
                         _buildQuickSearchFilterButton(context, QuickSearchFilter.folder),
                         MailboxDashboardViewWebStyle.searchFilterSizeBoxMargin,
-                        if (isLabelAvailable)
+                        if (isLabelAvailable && labelList.isNotEmpty)
                           ...[
                             _buildQuickSearchFilterButton(
                               context,

lib/features/mailbox_dashboard/presentation/widgets/advanced_search/advanced_search_input_form.dart

@@ -131,7 +131,7 @@ class AdvancedSearchInputForm extends GetWidget<AdvancedFilterController> {
 
             final labelSelected = controller.selectedLabel.value;
 
-            if (isLabelAvailable) {
+            if (isLabelAvailable && labels.isNotEmpty) {
               return AdvancedSearchFieldWidget(
                 filterField: FilterField.labels,
                 padding: const EdgeInsets.only(bottom: 12),

lib/features/search/email/presentation/search_email_view.dart

@@ -270,6 +270,8 @@ class SearchEmailView extends GetWidget<SearchEmailController>
               child: Obx(() {
                 final isLabelAvailable =
                     controller.mailboxDashBoardController.isLabelAvailable;
+                final labelList = controller
+                    .mailboxDashBoardController.labelController.labels;
 
                 return ListView(
                   key: const Key('search_filter_list_view'),
@@ -283,7 +285,7 @@ class SearchEmailView extends GetWidget<SearchEmailController>
                   children: [
                     _buildSearchFilterButton(context, QuickSearchFilter.folder),
                     SearchEmailViewStyle.searchFilterSizeBoxMargin,
-                    if (isLabelAvailable)
+                    if (isLabelAvailable && labelList.isNotEmpty)
                      ...[
                        _buildSearchFilterButton(context, QuickSearchFilter.labels),
                        SearchEmailViewStyle.searchFilterSizeBoxMargin,

lib/features/thread_detail/presentation/extension/on_thread_detail_action_click.dart

@@ -137,7 +137,8 @@ extension OnThreadDetailActionClick on ThreadDetailController {
     if (currentContext == null) return;
 
     final moreActions = [
-      if (mailboxDashBoardController.isLabelAvailable)
+      if (mailboxDashBoardController.isLabelAvailable &&
+          mailboxDashBoardController.labelController.labels.isNotEmpty)
         EmailActionType.labelAs,
       threadDetailIsRead
           ? EmailActionType.markAsUnread