From 5fb0aa84e833a205826a99f7ed03315752a0fd29 Mon Sep 17 00:00:00 2001
From: dab246 <tdvu@linagora.com>
Date: Fri, 28 Nov 2025 03:18:40 +0700
Subject: [PATCH] TF-4171 Display tag in mailbox list, search list on mobile

---
 labels/lib/extensions/label_extension.dart    |  16 +
 .../base/widget/labels/tag_widget.dart        |   3 +-
 .../presentation/utils/label_utils.dart       |  61 ++-
 .../widgets/label_list_widget.dart            |  45 +-
 .../presentation/widgets/label_widget.dart    |   8 +
 .../email/presentation/search_email_view.dart |  23 +-
 .../widgets/email_tile_builder.dart           | 103 ++++-
 .../widgets/email_tile_web_builder.dart       | 384 ++++++++++++------
 .../web_tablet_body_email_item_widget.dart    | 114 +++++-
 .../label/compute_displayed_tags_test.dart    | 228 ++++++++++-
 test/features/label/truncate_label_test.dart  |  42 ++
 11 files changed, 843 insertions(+), 184 deletions(-)
 create mode 100644 test/features/label/truncate_label_test.dart

diff --git a/labels/lib/extensions/label_extension.dart b/labels/lib/extensions/label_extension.dart
index 81219b061..d28d5283a 100644
--- a/labels/lib/extensions/label_extension.dart
+++ b/labels/lib/extensions/label_extension.dart
@@ -1,6 +1,8 @@
 import 'package:core/presentation/extensions/color_extension.dart';
 import 'package:core/presentation/extensions/hex_color_extension.dart';
 import 'package:flutter/material.dart';
+import 'package:jmap_dart_client/jmap/core/id.dart';
+import 'package:labels/model/hex_color.dart';
 import 'package:labels/model/label.dart';
 
 extension LabelExtension on Label {
@@ -23,4 +25,18 @@ extension LabelExtension on Label {
       return Colors.white;
     }
   }
+
+  Label copyWith({
+    Id? id,
+    String? keyword,
+    String? displayName,
+    HexColor? color,
+  }) {
+    return Label(
+      id: id ?? this.id,
+      displayName: displayName ?? this.displayName,
+      keyword: keyword ?? this.keyword,
+      color: color ?? this.color,
+    );
+  }
 }
diff --git a/lib/features/base/widget/labels/tag_widget.dart b/lib/features/base/widget/labels/tag_widget.dart
index a85d93e53..059bc34a5 100644
--- a/lib/features/base/widget/labels/tag_widget.dart
+++ b/lib/features/base/widget/labels/tag_widget.dart
@@ -1,5 +1,6 @@
 import 'package:core/presentation/utils/theme_utils.dart';
 import 'package:flutter/material.dart';
+import 'package:tmail_ui_user/features/labels/presentation/utils/label_utils.dart';
 
 class TagWidget extends StatelessWidget {
   final String text;
@@ -26,7 +27,7 @@ class TagWidget extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     Widget labelText = Text(
-      isTruncateText ? _truncateName(text) : text,
+      isTruncateText ? LabelUtils.truncateLabel(text) : text,
       style: ThemeUtils.textStyleContentCaption().copyWith(
         color: textColor,
       ),
diff --git a/lib/features/labels/presentation/utils/label_utils.dart b/lib/features/labels/presentation/utils/label_utils.dart
index ecc5b9476..f90ead98a 100644
--- a/lib/features/labels/presentation/utils/label_utils.dart
+++ b/lib/features/labels/presentation/utils/label_utils.dart
@@ -73,7 +73,7 @@ class LabelUtils {
       }
 
       final remainingCount = total - 1;
-      final plus = _buildPlusLabel(remainingCount);
+      final plus = buildPlusLabel(remainingCount);
 
       double plusWidth = effectiveMeasure(plus);
       if (plusMaxWidth != null) {
@@ -97,7 +97,7 @@ class LabelUtils {
 
     // Normal shrink logic
     while (fitCount > 0) {
-      final plus = _buildPlusLabel(remaining);
+      final plus = buildPlusLabel(remaining);
 
       double plusWidth = effectiveMeasure(plus);
       if (plusMaxWidth != null) {
@@ -151,7 +151,7 @@ class LabelUtils {
         plusMaxWidth: plusMaxWidth,
         measureWidth: measureWidth,
       );
-    } catch (_, __) {
+    } catch (_) {
       if (tags.isEmpty) {
         return (displayed: const [], hiddenCount: 0);
       }
@@ -186,8 +186,61 @@ class LabelUtils {
     return (fitCount: fit, usedWidth: used);
   }
 
-  static Label _buildPlusLabel(int n) => Label(
+  static Label buildPlusLabel(int n) => Label(
         id: Id(LabelExtension.moreLabelId),
         displayName: n > 999 ? '+999+' : '+$n',
       );
+
+  static ({
+    List<Label> displayed,
+    int hiddenCount,
+  }) computeDisplayedLabelsByMaxDisplay({
+    required List<Label> labels,
+    int maxDisplay = 3,
+  }) {
+    if (labels.isEmpty) {
+      return (displayed: [], hiddenCount: 0);
+    }
+
+    final limited =
+        labels.length <= maxDisplay ? labels : labels.take(maxDisplay).toList();
+
+    final hiddenCount =
+        labels.length > maxDisplay ? labels.length - maxDisplay : 0;
+
+    return (displayed: limited, hiddenCount: hiddenCount);
+  }
+
+  static ({
+    List<Label> displayed,
+    int hiddenCount,
+  }) safeComputeDisplayedLabelsByMaxDisplay({
+    required List<Label> labels,
+    int maxDisplay = 3,
+  }) {
+    try {
+      return computeDisplayedLabelsByMaxDisplay(
+        labels: labels,
+        maxDisplay: maxDisplay,
+      );
+    } catch (_) {
+      if (labels.isEmpty) {
+        return (displayed: const [], hiddenCount: 0);
+      }
+
+      return (
+        displayed: [labels.first],
+        hiddenCount: labels.length - 1,
+      );
+    }
+  }
+
+  static String truncateLabel(String name, {int maxLength = 16}) {
+    try {
+      if (name.length <= maxLength) return name;
+      return '${name.substring(0, maxLength - 1)}...';
+    } catch (_) {
+      return name;
+    }
+  }
 }
diff --git a/lib/features/labels/presentation/widgets/label_list_widget.dart b/lib/features/labels/presentation/widgets/label_list_widget.dart
index f29bb0855..5e1f79ad9 100644
--- a/lib/features/labels/presentation/widgets/label_list_widget.dart
+++ b/lib/features/labels/presentation/widgets/label_list_widget.dart
@@ -8,16 +8,26 @@ class LabelTagListWidget extends StatelessWidget {
   final List<Label> tags;
   final double horizontalPadding;
   final double itemSpacing;
+  final bool autoWrapTagsByMaxWidth;
+  final bool isDesktop;
 
   const LabelTagListWidget({
     super.key,
     required this.tags,
     this.horizontalPadding = 4,
     this.itemSpacing = 12,
+    this.autoWrapTagsByMaxWidth = false,
+    this.isDesktop = false,
   });
 
   @override
   Widget build(BuildContext context) {
+    return autoWrapTagsByMaxWidth
+        ? _buildAutoWrapMode()
+        : _buildFixedDisplayMode();
+  }
+
+  Widget _buildAutoWrapMode() {
     return LayoutBuilder(
       builder: (_, constraints) {
         final maxWidth = constraints.maxWidth;
@@ -25,7 +35,7 @@ class LabelTagListWidget extends StatelessWidget {
         final tagMaxWidth =
             maxWidth - LabelUtils.defaultPlusMaxWidth - itemSpacing;
 
-        final displayedTagsDataResult = LabelUtils.safeComputeDisplayedTags(
+        final result = LabelUtils.safeComputeDisplayedTags(
           tags: tags,
           maxWidth: maxWidth,
           textStyle: ThemeUtils.textStyleContentCaption(),
@@ -38,7 +48,7 @@ class LabelTagListWidget extends StatelessWidget {
         return Wrap(
           spacing: itemSpacing,
           runSpacing: 6,
-          children: displayedTagsDataResult.displayed
+          children: result.displayed
               .map(
                 (tagDisplayed) => LabelWidget(
                   label: tagDisplayed,
@@ -51,4 +61,35 @@ class LabelTagListWidget extends StatelessWidget {
       },
     );
   }
+
+  Widget _buildFixedDisplayMode() {
+    final result = LabelUtils.safeComputeDisplayedLabelsByMaxDisplay(
+      labels: tags,
+      maxDisplay: isDesktop ? 3 : 1,
+    );
+
+    final displayedWidgets = result.displayed.map((label) {
+      return LabelWidget(
+        label: label,
+        horizontalPadding: horizontalPadding,
+        isTruncateLabel: true,
+      );
+    });
+
+    final plusWidget = (result.hiddenCount > 0)
+        ? LabelWidget(
+            label: LabelUtils.buildPlusLabel(result.hiddenCount),
+            horizontalPadding: horizontalPadding,
+          )
+        : null;
+
+    return Wrap(
+      spacing: itemSpacing,
+      runSpacing: 6,
+      children: [
+        ...displayedWidgets,
+        if (plusWidget != null) plusWidget,
+      ],
+    );
+  }
 }
diff --git a/lib/features/labels/presentation/widgets/label_widget.dart b/lib/features/labels/presentation/widgets/label_widget.dart
index 8d64ca8e6..7106684de 100644
--- a/lib/features/labels/presentation/widgets/label_widget.dart
+++ b/lib/features/labels/presentation/widgets/label_widget.dart
@@ -1,3 +1,4 @@
+import 'package:core/utils/platform_info.dart';
 import 'package:flutter/material.dart';
 import 'package:labels/extensions/label_extension.dart';
 import 'package:labels/model/label.dart';
@@ -7,22 +8,29 @@ class LabelWidget extends StatelessWidget {
   final Label label;
   final double horizontalPadding;
   final double? maxWidth;
+  final bool isTruncateLabel;
 
   const LabelWidget({
     super.key,
     required this.label,
     this.horizontalPadding = 4,
     this.maxWidth,
+    this.isTruncateLabel = false,
   });
 
   @override
   Widget build(BuildContext context) {
+    final showTooltip =
+        PlatformInfo.isWeb && label.id?.value != LabelExtension.moreLabelId;
+
     return TagWidget(
       text: label.safeDisplayName,
       backgroundColor: label.backgroundColor,
       textColor: label.textColor,
       horizontalPadding: horizontalPadding,
       maxWidth: maxWidth,
+      isTruncateText: isTruncateLabel,
+      showTooltip: showTooltip,
     );
   }
 }
diff --git a/lib/features/search/email/presentation/search_email_view.dart b/lib/features/search/email/presentation/search_email_view.dart
index 6bae4a297..1fcccde8c 100644
--- a/lib/features/search/email/presentation/search_email_view.dart
+++ b/lib/features/search/email/presentation/search_email_view.dart
@@ -17,6 +17,7 @@ import 'package:tmail_ui_user/features/base/mixin/app_loader_mixin.dart';
 import 'package:tmail_ui_user/features/base/widget/keyboard/keyboard_handler_wrapper.dart';
 import 'package:tmail_ui_user/features/base/widget/popup_menu/popup_menu_item_action_widget.dart';
 import 'package:tmail_ui_user/features/base/widget/scrollbar_list_view.dart';
+import 'package:tmail_ui_user/features/email/presentation/extensions/presentation_email_extension.dart';
 import 'package:tmail_ui_user/features/mailbox_dashboard/domain/model/recent_search.dart';
 import 'package:tmail_ui_user/features/mailbox_dashboard/presentation/extensions/handle_ai_needs_action_extension.dart';
 import 'package:tmail_ui_user/features/mailbox_dashboard/presentation/model/search/email_receive_time_type.dart';
@@ -654,7 +655,10 @@ class SearchEmailView extends GetWidget<SearchEmailController>
     );
   }
 
-  Widget _buildListEmailBody(BuildContext context, List<PresentationEmail> listPresentationEmail) {
+  Widget _buildListEmailBody(
+    BuildContext context,
+    List<PresentationEmail> listPresentationEmail,
+  ) {
     return NotificationListener<ScrollNotification>(
         key: const Key('search_email_list_notification_listener'),
         onNotification: (ScrollNotification scrollInfo) {
@@ -678,11 +682,15 @@ class SearchEmailView extends GetWidget<SearchEmailController>
           separatorBuilder: (context, index) {
             return Obx(() {
               final isMobile = PlatformInfo.isMobile;
+              final isLastItem = index == listPresentationEmail.length - 1;
               final isInactive =
                   controller.selectionMode.value == SelectMode.INACTIVE;
 
-              final dividerColor =
-                  isMobile ? null : (isInactive ? null : Colors.white);
+              final showDivider = !isLastItem;
+
+              final dividerColor = isMobile
+                  ? null
+                  : (showDivider && isInactive ? null : Colors.white);
 
               final padding = isMobile
                   ? SearchEmailUtils.getPaddingItemListMobile(
@@ -694,6 +702,10 @@ class SearchEmailView extends GetWidget<SearchEmailController>
                       controller.responsiveUtils,
                     );
 
+              if (!showDivider) {
+                return const SizedBox.shrink();
+              }
+
               return Padding(
                 padding: padding,
                 child: Divider(color: dividerColor),
@@ -720,6 +732,10 @@ class SearchEmailView extends GetWidget<SearchEmailController>
 
         final isAINeedsActionEnabled = dashboardController.isAINeedsActionEnabled;
 
+        final allLabels = dashboardController.labelController.labels;
+
+        final emailLabels = presentationEmail.getLabelList(allLabels);
+
         return EmailTileBuilder(
           presentationEmail: presentationEmail,
           selectAllMode: controller.selectionMode.value,
@@ -728,6 +744,7 @@ class SearchEmailView extends GetWidget<SearchEmailController>
           isSenderImportantFlagEnabled: isSenderImportantFlagEnabled,
           isSearchEmailRunning: true,
           isAINeedsActionEnabled: isAINeedsActionEnabled,
+          labels: emailLabels,
           padding: SearchEmailViewStyle.getPaddingSearchResultList(
             context,
             controller.responsiveUtils,
diff --git a/lib/features/thread/presentation/widgets/email_tile_builder.dart b/lib/features/thread/presentation/widgets/email_tile_builder.dart
index 7580f8f9e..e0e212add 100644
--- a/lib/features/thread/presentation/widgets/email_tile_builder.dart
+++ b/lib/features/thread/presentation/widgets/email_tile_builder.dart
@@ -6,6 +6,7 @@ import 'package:model/email/presentation_email.dart';
 import 'package:model/mailbox/presentation_mailbox.dart';
 import 'package:model/mailbox/select_mode.dart';
 import 'package:tmail_ui_user/features/base/widget/labels/ai_action_tag_widget.dart';
+import 'package:tmail_ui_user/features/labels/presentation/widgets/label_list_widget.dart';
 import 'package:tmail_ui_user/features/thread/domain/model/search_query.dart';
 import 'package:tmail_ui_user/features/thread/presentation/mixin/base_email_item_tile.dart';
 import 'package:tmail_ui_user/features/thread/presentation/styles/item_email_tile_styles.dart';
@@ -22,6 +23,7 @@ class EmailTileBuilder extends StatelessWidget with BaseEmailItemTile {
   final bool isShowingEmailContent;
   final bool isSenderImportantFlagEnabled;
   final bool isAINeedsActionEnabled;
+  final bool autoWrapTagsByMaxWidth;
   final List<Label>? labels;
   final OnPressEmailActionClick? emailActionClick;
   final OnMoreActionClick? onMoreActionClick;
@@ -36,6 +38,7 @@ class EmailTileBuilder extends StatelessWidget with BaseEmailItemTile {
     this.isSearchEmailRunning = false,
     this.isSenderImportantFlagEnabled = true,
     this.isAINeedsActionEnabled = true,
+    this.autoWrapTagsByMaxWidth = false,
     this.mailboxContain,
     this.padding,
     this.isDrag = false,
@@ -128,17 +131,7 @@ class EmailTileBuilder extends StatelessWidget with BaseEmailItemTile {
                 )),
             Padding(
                 padding: const EdgeInsetsDirectional.only(top: 2),
-                child: Row(children: [
-                  Expanded(child: buildEmailPartialContent(
-                    context,
-                    presentationEmail,
-                    isSearchEmailRunning,
-                    searchQuery)),
-                  if (_shouldShowAIAction)
-                    const AiActionTagWidget(
-                      margin: EdgeInsetsDirectional.only(start: 8),
-                    ),
-                ])
+                child: _buildPartialContent(context),
             ),
           ],
         ),
@@ -146,6 +139,94 @@ class EmailTileBuilder extends StatelessWidget with BaseEmailItemTile {
     );
   }
 
+  Widget _buildPartialContent(BuildContext context) {
+    final hasLabels = labels?.isNotEmpty == true;
+    final isDesktop = responsiveUtils.isDesktop(context);
+    final isAutoWrap = autoWrapTagsByMaxWidth;
+
+    final hasContent =
+        presentationEmail.getPartialContent().isNotEmpty;
+
+    final partialContent = buildEmailPartialContent(
+      context,
+      presentationEmail,
+      isSearchEmailRunning,
+      searchQuery,
+    );
+
+    if (!hasLabels) {
+      return Row(
+        children: [
+          if (hasContent)
+            Flexible(child: partialContent),
+          if (_shouldShowAIAction)
+            const AiActionTagWidget(
+              margin: EdgeInsetsDirectional.only(start: 8),
+            ),
+        ],
+      );
+    }
+
+    if (!hasContent) {
+      return Row(
+        children: [
+          if (_shouldShowAIAction)
+            const AiActionTagWidget(
+              margin: EdgeInsetsDirectional.only(start: 8),
+            ),
+          Flexible(
+            child: LabelTagListWidget(
+              tags: labels!,
+              autoWrapTagsByMaxWidth: isAutoWrap,
+              isDesktop: isDesktop,
+            ),
+          ),
+        ],
+      );
+    }
+
+    if (!isAutoWrap) {
+      return Row(
+        children: [
+          Flexible(child: partialContent),
+          if (_shouldShowAIAction)
+            const AiActionTagWidget(
+              margin: EdgeInsetsDirectional.only(start: 8),
+            ),
+          const SizedBox(width: 12),
+          LabelTagListWidget(
+            tags: labels!,
+            autoWrapTagsByMaxWidth: isAutoWrap,
+            isDesktop: isDesktop,
+          ),
+        ],
+      );
+    }
+
+    return LayoutBuilder(
+      builder: (_, constraints) {
+        return Row(
+          children: [
+            Expanded(child: partialContent),
+            if (_shouldShowAIAction)
+              const AiActionTagWidget(
+                margin: EdgeInsetsDirectional.only(start: 8),
+              ),
+            const SizedBox(width: 12),
+            ConstrainedBox(
+              constraints: BoxConstraints(maxWidth: constraints.maxWidth / 2),
+              child: LabelTagListWidget(
+                tags: labels!,
+                autoWrapTagsByMaxWidth: isAutoWrap,
+                isDesktop: isDesktop,
+              ),
+            ),
+          ],
+        );
+      },
+    );
+  }
+
   bool get _shouldShowAIAction =>
       isAINeedsActionEnabled && presentationEmail.hasNeedAction;
 }
\ No newline at end of file
diff --git a/lib/features/thread/presentation/widgets/email_tile_web_builder.dart b/lib/features/thread/presentation/widgets/email_tile_web_builder.dart
index f13644305..c27060f65 100644
--- a/lib/features/thread/presentation/widgets/email_tile_web_builder.dart
+++ b/lib/features/thread/presentation/widgets/email_tile_web_builder.dart
@@ -30,6 +30,7 @@ class EmailTileBuilder extends StatefulWidget {
   final bool isShowingEmailContent;
   final bool isSenderImportantFlagEnabled;
   final bool isAINeedsActionEnabled;
+  final bool autoWrapTagsByMaxWidth;
   final List<Label>? labels;
   final OnPressEmailActionClick? emailActionClick;
   final OnMoreActionClick? onMoreActionClick;
@@ -43,6 +44,7 @@ class EmailTileBuilder extends StatefulWidget {
     this.searchQuery,
     this.isSearchEmailRunning = false,
     this.isSenderImportantFlagEnabled = true,
+    this.autoWrapTagsByMaxWidth = false,
     this.mailboxContain,
     this.padding,
     this.isDrag = false,
@@ -100,88 +102,78 @@ class _EmailTileBuilderState extends State<EmailTileBuilder>  with BaseEmailItem
                   ),
                 ),
                 Expanded(
-                  child: Column(children: [
-                    Row(children: [
-                      if (!widget.presentationEmail.hasRead)
-                        Padding(
-                          padding: const EdgeInsetsDirectional.only(end: 5),
-                          child: buildIconUnreadStatus(),
-                        ),
-                      Expanded(
-                        child: buildInformationSender(
-                          context,
-                          widget.presentationEmail,
-                          widget.mailboxContain,
-                          widget.isSearchEmailRunning,
-                          widget.searchQuery
-                        )
-                      ),
-                      buildIconAnsweredOrForwarded(
-                        width: 16,
-                        height: 16,
-                        presentationEmail: widget.presentationEmail
-                      ),
-                      if (widget.presentationEmail.hasAttachment == true)
-                        Padding(
-                          padding: const EdgeInsetsDirectional.only(start: 8),
-                          child: buildIconAttachment(),
-                        ),
-                      Padding(
-                        padding: const EdgeInsetsDirectional.only(
-                          end: 4,
-                          start: 8
-                        ),
-                        child: buildDateTime(context, widget.presentationEmail)
-                      ),
-                      buildIconChevron()
-                    ]),
-                    const SizedBox(height: 2),
-                    Row(
-                      mainAxisSize: MainAxisSize.min,
-                      children: [
-                        if (widget.presentationEmail.hasCalendarEvent)
-                          buildCalendarEventIcon(
-                            context: context,
-                            presentationEmail: widget.presentationEmail
+                  child: Column(
+                    crossAxisAlignment: CrossAxisAlignment.start,
+                    children: [
+                      Row(children: [
+                        if (!widget.presentationEmail.hasRead)
+                          Padding(
+                            padding: const EdgeInsetsDirectional.only(end: 5),
+                            child: buildIconUnreadStatus(),
                           ),
-                        if (widget.presentationEmail.isMarkAsImportant && widget.isSenderImportantFlagEnabled)
-                          buildMarkAsImportantIcon(context),
                         Expanded(
-                          child: buildEmailTitle(
+                          child: buildInformationSender(
                             context,
                             widget.presentationEmail,
+                            widget.mailboxContain,
                             widget.isSearchEmailRunning,
                             widget.searchQuery
                           )
                         ),
-                        buildMailboxContain(
-                          context,
-                          widget.isSearchEmailRunning,
-                          widget.presentationEmail
+                        buildIconAnsweredOrForwarded(
+                          width: 16,
+                          height: 16,
+                          presentationEmail: widget.presentationEmail
                         ),
-                        if (widget.presentationEmail.hasStarred)
+                        if (widget.presentationEmail.hasAttachment == true)
                           Padding(
                             padding: const EdgeInsetsDirectional.only(start: 8),
-                            child: buildIconStar(),
+                            child: buildIconAttachment(),
                           ),
-                      ],
-                    ),
-                    const SizedBox(height: 2),
-                    Row(children: [
-                      Expanded(
-                        child: buildEmailPartialContent(
-                          context,
-                          widget.presentationEmail,
-                          widget.isSearchEmailRunning,
-                          widget.searchQuery
-                        )
-                      ),
-                      if (_shouldShowAIAction)
-                        const AiActionTagWidget(
-                          margin: EdgeInsetsDirectional.only(start: 8),
+                        Padding(
+                          padding: const EdgeInsetsDirectional.only(
+                            end: 4,
+                            start: 8
+                          ),
+                          child: buildDateTime(context, widget.presentationEmail)
                         ),
-                    ]),
-                  ]),
+                        buildIconChevron()
+                      ]),
+                      const SizedBox(height: 2),
+                      Row(
+                        mainAxisSize: MainAxisSize.min,
+                        children: [
+                          if (widget.presentationEmail.hasCalendarEvent)
+                            buildCalendarEventIcon(
+                              context: context,
+                              presentationEmail: widget.presentationEmail
+                            ),
+                          if (widget.presentationEmail.isMarkAsImportant && widget.isSenderImportantFlagEnabled)
+                            buildMarkAsImportantIcon(context),
+                          Expanded(
+                            child: buildEmailTitle(
+                              context,
+                              widget.presentationEmail,
+                              widget.isSearchEmailRunning,
+                              widget.searchQuery
+                            )
+                          ),
+                          buildMailboxContain(
+                            context,
+                            widget.isSearchEmailRunning,
+                            widget.presentationEmail
+                          ),
+                          if (widget.presentationEmail.hasStarred)
+                            Padding(
+                              padding: const EdgeInsetsDirectional.only(start: 8),
+                              child: buildIconStar(),
+                            ),
+                        ],
+                      ),
+                      const SizedBox(height: 2),
+                      _buildPartialContentMobile(context),
+                    ],
+                  ),
                 )
               ]
             ),
@@ -197,6 +189,8 @@ class _EmailTileBuilderState extends State<EmailTileBuilder>  with BaseEmailItem
         isDrag: widget.isDrag,
         isSenderImportantFlagEnabled: widget.isSenderImportantFlagEnabled,
         shouldShowAIAction: _shouldShowAIAction,
+        autoWrapTagsByMaxWidth: widget.autoWrapTagsByMaxWidth,
+        labels: widget.labels,
         padding: widget.padding,
         searchQuery: widget.searchQuery,
         mailboxContain: widget.mailboxContain,
@@ -320,7 +314,7 @@ class _EmailTileBuilderState extends State<EmailTileBuilder>  with BaseEmailItem
                   )
                 ),
                 const SizedBox(width: 24),
-                Expanded(child: _buildSubjectAndContent()),
+                Expanded(child: _buildSubjectAndContent(context)),
                 const SizedBox(width: 16),
                 ValueListenableBuilder(
                   valueListenable: _hoverNotifier,
@@ -373,8 +367,9 @@ class _EmailTileBuilderState extends State<EmailTileBuilder>  with BaseEmailItem
     return widget.mailboxContain?.isTrash == true || widget.mailboxContain?.isDrafts == true || widget.mailboxContain?.isSpam == true;
   }
 
-  Widget _buildSubjectAndContent() {
+  Widget _buildSubjectAndContent(BuildContext context) {
     final emailTitle = widget.presentationEmail.getEmailTitle();
+    final emailPartialContent = widget.presentationEmail.getPartialContent();
 
     return Row(
       children: [
@@ -391,78 +386,40 @@ class _EmailTileBuilderState extends State<EmailTileBuilder>  with BaseEmailItem
         Expanded(
           child: LayoutBuilder(
             builder: (_, constraints) {
+              const horizontalPadding = 12.0;
+
               final maxWidth = constraints.maxWidth;
-              double horizontalPadding = 12;
               final maxWidthNoPadding = maxWidth - horizontalPadding * 2;
 
-              final labelTagsMaxWidth = emailTitle.isNotEmpty
-                  ? maxWidthNoPadding * 0.4
-                  : maxWidthNoPadding * 0.5;
+              final hasLabels = widget.labels?.isNotEmpty == true;
+              final isAutoWrap = widget.autoWrapTagsByMaxWidth;
+              final hasTitle = emailTitle.isNotEmpty;
+              final hasContent = emailPartialContent.isNotEmpty;
 
-              final emailTitleMaxWidth = widget.labels?.isNotEmpty == true
-                  ? maxWidthNoPadding * 0.4
-                  : maxWidthNoPadding * 0.5;
+              final labelTagsMaxWidth =
+                  hasTitle ? maxWidthNoPadding * 0.4 : maxWidthNoPadding * 0.5;
+
+              final emailTitleMaxWidth =
+                  hasLabels ? maxWidthNoPadding * 0.4 : maxWidthNoPadding * 0.5;
 
               return Row(
                 children: [
-                  if (widget.labels?.isNotEmpty == true) ...[
-                    Container(
-                      constraints: BoxConstraints(
-                        maxWidth: labelTagsMaxWidth,
-                      ),
-                      padding: EdgeInsetsDirectional.only(
-                        end: horizontalPadding,
-                      ),
-                      child: LabelTagListWidget(tags: widget.labels!),
+                  if (hasLabels)
+                    _buildLabelsDesktop(
+                      context: context,
+                      maxWidth: labelTagsMaxWidth,
+                      horizontalPadding: horizontalPadding,
+                      isAutoWrap: isAutoWrap,
                     ),
-                    if (emailTitle.isNotEmpty)
-                      Container(
-                        constraints: BoxConstraints(
-                          maxWidth: emailTitleMaxWidth,
-                        ),
-                        padding: EdgeInsetsDirectional.only(
-                          end: horizontalPadding,
-                        ),
-                        child: buildEmailTitle(
-                          context,
-                          widget.presentationEmail,
-                          widget.isSearchEmailRunning,
-                          widget.searchQuery,
-                        ),
-                      ),
-                    Expanded(
-                      child: buildEmailPartialContent(
-                        context,
-                        widget.presentationEmail,
-                        widget.isSearchEmailRunning,
-                        widget.searchQuery,
-                      ),
+                  if (hasTitle)
+                    _buildTitleDesktop(
+                      context: context,
+                      maxWidth: emailTitleMaxWidth,
+                      horizontalPadding: horizontalPadding,
+                      hasContent: hasContent,
                     ),
-                  ] else ...[
-                    if (emailTitle.isNotEmpty)
-                      Container(
-                        constraints: BoxConstraints(
-                          maxWidth: emailTitleMaxWidth,
-                        ),
-                        padding: EdgeInsetsDirectional.only(
-                          end: horizontalPadding,
-                        ),
-                        child: buildEmailTitle(
-                          context,
-                          widget.presentationEmail,
-                          widget.isSearchEmailRunning,
-                          widget.searchQuery,
-                        ),
-                      ),
-                    Expanded(
-                      child: buildEmailPartialContent(
-                        context,
-                        widget.presentationEmail,
-                        widget.isSearchEmailRunning,
-                        widget.searchQuery,
-                      ),
-                    ),
-                  ],
+                  if (hasContent)
+                    _buildPartialContentDesktop(context),
                 ],
               );
             },
@@ -472,6 +429,165 @@ class _EmailTileBuilderState extends State<EmailTileBuilder>  with BaseEmailItem
     );
   }
 
+  Widget _buildLabelsDesktop({
+    required BuildContext context,
+    required double maxWidth,
+    required double horizontalPadding,
+    required bool isAutoWrap,
+  }) {
+    final labels = widget.labels;
+    if (labels == null || labels.isEmpty) return const SizedBox.shrink();
+
+    final child = LabelTagListWidget(
+      tags: labels,
+      autoWrapTagsByMaxWidth: widget.autoWrapTagsByMaxWidth,
+      isDesktop: responsiveUtils.isDesktop(context),
+    );
+
+    if (isAutoWrap) {
+      return Container(
+        constraints: BoxConstraints(maxWidth: maxWidth),
+        padding: EdgeInsetsDirectional.only(end: horizontalPadding),
+        child: child,
+      );
+    }
+
+    return Padding(
+      padding: EdgeInsetsDirectional.only(end: horizontalPadding),
+      child: child,
+    );
+  }
+
+  Widget _buildTitleDesktop({
+    required BuildContext context,
+    required double maxWidth,
+    required double horizontalPadding,
+    bool hasContent = false,
+  }) {
+    if (hasContent) {
+      return Container(
+        constraints: BoxConstraints(maxWidth: maxWidth),
+        padding: EdgeInsetsDirectional.only(end: horizontalPadding),
+        child: buildEmailTitle(
+          context,
+          widget.presentationEmail,
+          widget.isSearchEmailRunning,
+          widget.searchQuery,
+        ),
+      );
+    } else {
+      return Expanded(
+        child: Padding(
+          padding: EdgeInsetsDirectional.only(end: horizontalPadding),
+          child: buildEmailTitle(
+            context,
+            widget.presentationEmail,
+            widget.isSearchEmailRunning,
+            widget.searchQuery,
+          ),
+        ),
+      );
+    }
+  }
+
+  Widget _buildPartialContentDesktop(BuildContext context) {
+    return Expanded(
+      child: buildEmailPartialContent(
+        context,
+        widget.presentationEmail,
+        widget.isSearchEmailRunning,
+        widget.searchQuery,
+      ),
+    );
+  }
+
+  Widget _buildPartialContentMobile(BuildContext context) {
+    final labels = widget.labels;
+    final hasLabels = labels?.isNotEmpty == true;
+    final hasContent = widget.presentationEmail.getPartialContent().isNotEmpty;
+    final isAutoWrap = widget.autoWrapTagsByMaxWidth;
+    final isDesktop = responsiveUtils.isDesktop(context);
+
+    final partialContent = buildEmailPartialContent(
+      context,
+      widget.presentationEmail,
+      widget.isSearchEmailRunning,
+      widget.searchQuery,
+    );
+
+    if (!hasLabels) {
+      return Row(
+        children: [
+          if (hasContent)
+            Flexible(child: partialContent),
+          if (_shouldShowAIAction)
+            const AiActionTagWidget(
+              margin: EdgeInsetsDirectional.only(start: 8),
+            ),
+        ],
+      );
+    }
+
+    if (!hasContent) {
+      return Row(
+        children: [
+          if (_shouldShowAIAction)
+            const AiActionTagWidget(
+              margin: EdgeInsetsDirectional.only(start: 8),
+            ),
+          Flexible(
+            child: LabelTagListWidget(
+              tags: labels!,
+              autoWrapTagsByMaxWidth: isAutoWrap,
+              isDesktop: isDesktop,
+            ),
+          ),
+        ],
+      );
+    }
+
+    if (!isAutoWrap) {
+      return Row(
+        children: [
+          Flexible(child: partialContent),
+          if (_shouldShowAIAction)
+            const AiActionTagWidget(
+              margin: EdgeInsetsDirectional.only(start: 8),
+            ),
+          const SizedBox(width: 12),
+          LabelTagListWidget(
+            tags: labels!,
+            autoWrapTagsByMaxWidth: isAutoWrap,
+            isDesktop: isDesktop,
+          ),
+        ],
+      );
+    }
+
+    return LayoutBuilder(
+      builder: (_, constraints) {
+        return Row(
+          children: [
+            Expanded(child: partialContent),
+            if (_shouldShowAIAction)
+              const AiActionTagWidget(
+                margin: EdgeInsetsDirectional.only(start: 8),
+              ),
+            const SizedBox(width: 12),
+            ConstrainedBox(
+              constraints: BoxConstraints(maxWidth: constraints.maxWidth / 2),
+              child: LabelTagListWidget(
+                tags: labels!,
+                autoWrapTagsByMaxWidth: isAutoWrap,
+                isDesktop: isDesktop,
+              ),
+            ),
+          ],
+        );
+      },
+    );
+  }
+
   Widget _buildAvatarIcon({
     required BuildContext context,
     bool isHovered = false,
diff --git a/lib/features/thread/presentation/widgets/web_tablet_body_email_item_widget.dart b/lib/features/thread/presentation/widgets/web_tablet_body_email_item_widget.dart
index 4904531db..7304cf99e 100644
--- a/lib/features/thread/presentation/widgets/web_tablet_body_email_item_widget.dart
+++ b/lib/features/thread/presentation/widgets/web_tablet_body_email_item_widget.dart
@@ -3,12 +3,14 @@ import 'package:core/presentation/resources/image_paths.dart';
 import 'package:core/presentation/views/button/tmail_button_widget.dart';
 import 'package:flutter/material.dart';
 import 'package:get/get.dart';
+import 'package:labels/model/label.dart';
 import 'package:model/email/email_action_type.dart';
 import 'package:model/email/presentation_email.dart';
 import 'package:model/extensions/presentation_mailbox_extension.dart';
 import 'package:model/mailbox/presentation_mailbox.dart';
 import 'package:model/mailbox/select_mode.dart';
 import 'package:tmail_ui_user/features/base/widget/labels/ai_action_tag_widget.dart';
+import 'package:tmail_ui_user/features/labels/presentation/widgets/label_list_widget.dart';
 import 'package:tmail_ui_user/features/thread/domain/model/search_query.dart';
 import 'package:tmail_ui_user/features/thread/presentation/mixin/base_email_item_tile.dart';
 import 'package:tmail_ui_user/features/thread/presentation/styles/item_email_tile_styles.dart';
@@ -24,6 +26,8 @@ class WebTabletBodyEmailItemWidget extends StatefulWidget {
   final bool isDrag;
   final bool isSenderImportantFlagEnabled;
   final bool shouldShowAIAction;
+  final bool autoWrapTagsByMaxWidth;
+  final List<Label>? labels;
   final EdgeInsetsGeometry? padding;
   final SearchQuery? searchQuery;
   final PresentationMailbox? mailboxContain;
@@ -39,6 +43,8 @@ class WebTabletBodyEmailItemWidget extends StatefulWidget {
     required this.isShowingEmailContent,
     required this.isDrag,
     required this.isSenderImportantFlagEnabled,
+    required this.autoWrapTagsByMaxWidth,
+    required this.labels,
     required this.padding,
     required this.searchQuery,
     required this.mailboxContain,
@@ -102,6 +108,7 @@ class _WebTabletBodyEmailItemWidgetState
                   ),
                   Expanded(
                     child: Column(
+                      crossAxisAlignment: CrossAxisAlignment.start,
                       children: [
                         Row(children: [
                           if (!widget.presentationEmail.hasRead)
@@ -158,22 +165,7 @@ class _WebTabletBodyEmailItemWidgetState
                           ],
                         ),
                         const SizedBox(height: 2),
-                        Row(
-                          children: [
-                            Expanded(
-                              child: buildEmailPartialContent(
-                                context,
-                                widget.presentationEmail,
-                                widget.isSearchEmailRunning,
-                                widget.searchQuery,
-                              ),
-                            ),
-                            if (widget.shouldShowAIAction)
-                              const AiActionTagWidget(
-                                margin: EdgeInsetsDirectional.only(start: 8),
-                              ),
-                          ],
-                        ),
+                        _buildPartialContent(context),
                       ],
                     ),
                   )
@@ -384,4 +376,92 @@ class _WebTabletBodyEmailItemWidgetState
       });
     }
   }
-}
+
+  Widget _buildPartialContent(BuildContext context) {
+    final labels = widget.labels;
+    final hasLabels = labels?.isNotEmpty == true;
+    final isAutoWrap = widget.autoWrapTagsByMaxWidth;
+    final isDesktop = responsiveUtils.isDesktop(context);
+
+    final hasContent = widget.presentationEmail.getPartialContent().isNotEmpty;
+
+    final partialContent = buildEmailPartialContent(
+      context,
+      widget.presentationEmail,
+      widget.isSearchEmailRunning,
+      widget.searchQuery,
+    );
+
+    if (!hasLabels) {
+      return Row(
+        children: [
+          if (hasContent)
+            Flexible(child: partialContent),
+          if (widget.shouldShowAIAction)
+            const AiActionTagWidget(
+              margin: EdgeInsetsDirectional.only(start: 8),
+            ),
+        ],
+      );
+    }
+
+    if (!hasContent) {
+      return Row(
+        children: [
+          if (widget.shouldShowAIAction)
+            const AiActionTagWidget(
+              margin: EdgeInsetsDirectional.only(start: 8),
+            ),
+          Flexible(
+            child: LabelTagListWidget(
+              tags: labels!,
+              autoWrapTagsByMaxWidth: isAutoWrap,
+              isDesktop: isDesktop,
+            ),
+          ),
+        ],
+      );
+    }
+
+    if (!isAutoWrap) {
+      return Row(
+        children: [
+          Flexible(child: partialContent),
+          if (widget.shouldShowAIAction)
+            const AiActionTagWidget(
+              margin: EdgeInsetsDirectional.only(start: 8),
+            ),
+          const SizedBox(width: 12),
+          LabelTagListWidget(
+            tags: labels!,
+            autoWrapTagsByMaxWidth: isAutoWrap,
+            isDesktop: isDesktop,
+          ),
+        ],
+      );
+    }
+
+    return LayoutBuilder(
+      builder: (_, constraints) {
+        return Row(
+          children: [
+            Expanded(child: partialContent),
+            if (widget.shouldShowAIAction)
+              const AiActionTagWidget(
+                margin: EdgeInsetsDirectional.only(start: 8),
+              ),
+            const SizedBox(width: 12),
+            ConstrainedBox(
+              constraints: BoxConstraints(maxWidth: constraints.maxWidth / 2),
+              child: LabelTagListWidget(
+                tags: labels!,
+                autoWrapTagsByMaxWidth: isAutoWrap,
+                isDesktop: isDesktop,
+              ),
+            ),
+          ],
+        );
+      },
+    );
+  }
+}
\ No newline at end of file
diff --git a/test/features/label/compute_displayed_tags_test.dart b/test/features/label/compute_displayed_tags_test.dart
index 4e3011fe4..fb89aab5c 100644
--- a/test/features/label/compute_displayed_tags_test.dart
+++ b/test/features/label/compute_displayed_tags_test.dart
@@ -394,18 +394,6 @@ void main() {
       expect(result.hiddenCount, 2);
     });
 
-    test('safeComputeDisplayedTags falls back gracefully on exception', () {
-      final result = LabelUtils.safeComputeDisplayedTags(
-        tags: [Label(displayName: 'A'), Label(displayName: 'B')],
-        maxWidth: 100,
-        textStyle: const TextStyle(),
-        measureWidth: (_) => throw Exception('boom'),
-      );
-
-      expect(result.displayed.single.safeDisplayName, 'A');
-      expect(result.hiddenCount, 1);
-    });
-
     test('respects tagMaxWidth by clamping oversized label width', () {
       final tags = [
         label('SUPER_LONG_TAG_NAME'),
@@ -479,4 +467,220 @@ void main() {
       );
     });
   });
+
+  group('LabelUtils.safeComputeDisplayedTags', () {
+    test('should falls back gracefully on exception', () {
+      final result = LabelUtils.safeComputeDisplayedTags(
+        tags: [Label(displayName: 'A'), Label(displayName: 'B')],
+        maxWidth: 100,
+        textStyle: const TextStyle(),
+        measureWidth: (_) => throw Exception('boom'),
+      );
+
+      expect(result.displayed.single.safeDisplayName, 'A');
+      expect(result.hiddenCount, 1);
+    });
+  });
+
+  group('LabelUtils.computeDisplayedLabelsByMaxDisplay', () {
+    test('returns empty result when labels list is empty', () {
+      final result = LabelUtils.computeDisplayedLabelsByMaxDisplay(labels: []);
+
+      expect(result.displayed, isEmpty);
+      expect(result.hiddenCount, 0);
+    });
+
+    test('returns all labels when length <= maxDisplay', () {
+      final labels = [
+        label('A'),
+        label('B'),
+      ];
+
+      final result = LabelUtils.computeDisplayedLabelsByMaxDisplay(
+        labels: labels,
+        maxDisplay: 3,
+      );
+
+      expect(result.displayed.length, 2);
+      expect(result.displayed.map((e) => e.displayName), ['A', 'B']);
+      expect(result.hiddenCount, 0);
+    });
+
+    test('limits displayed to maxDisplay when list exceeds maxDisplay', () {
+      final labels = [
+        label('A'),
+        label('B'),
+        label('C'),
+        label('D'),
+      ];
+
+      final result = LabelUtils.computeDisplayedLabelsByMaxDisplay(
+        labels: labels,
+        maxDisplay: 3,
+      );
+
+      expect(result.displayed.length, 3);
+      expect(result.displayed.map((e) => e.displayName), ['A', 'B', 'C']);
+      expect(result.hiddenCount, 1);
+    });
+
+    test('computes hiddenCount correctly for larger list', () {
+      final labels = [
+        label('A'),
+        label('B'),
+        label('C'),
+        label('D'),
+        label('E'),
+      ];
+
+      final result = LabelUtils.computeDisplayedLabelsByMaxDisplay(
+        labels: labels,
+        maxDisplay: 3,
+      );
+
+      expect(result.displayed.length, 3);
+      expect(result.displayed.map((e) => e.displayName), ['A', 'B', 'C']);
+      expect(result.hiddenCount, 2);
+    });
+
+    test('works correctly when maxDisplay = 1', () {
+      final labels = [
+        label('A'),
+        label('B'),
+        label('C'),
+      ];
+
+      final result = LabelUtils.computeDisplayedLabelsByMaxDisplay(
+        labels: labels,
+        maxDisplay: 1,
+      );
+
+      expect(result.displayed.length, 1);
+      expect(result.displayed.first.displayName, 'A');
+      expect(result.hiddenCount, 2);
+    });
+
+    test('works correctly when maxDisplay is larger than list size', () {
+      final labels = [
+        label('A'),
+      ];
+
+      final result = LabelUtils.computeDisplayedLabelsByMaxDisplay(
+        labels: labels,
+        maxDisplay: 10,
+      );
+
+      expect(result.displayed.length, 1);
+      expect(result.displayed.map((e) => e.displayName), ['A']);
+      expect(result.hiddenCount, 0);
+    });
+
+    test('throws RangeError when maxDisplay < 0', () {
+      final labels = [
+        label('A'),
+        label('B'),
+        label('C'),
+      ];
+
+      expect(
+        () => LabelUtils.computeDisplayedLabelsByMaxDisplay(
+          labels: labels,
+          maxDisplay: -1,
+        ),
+        throwsA(isA<RangeError>()),
+      );
+    });
+  });
+
+  group('LabelUtils.safeComputeDisplayedLabelsByMaxDisplay', () {
+    test('returns empty result when labels list is empty', () {
+      final result =
+          LabelUtils.safeComputeDisplayedLabelsByMaxDisplay(labels: []);
+
+      expect(result.displayed, isEmpty);
+      expect(result.hiddenCount, 0);
+    });
+
+    test('returns normal compute result when no exception occurs', () {
+      final labels = [
+        label('A'),
+        label('B'),
+        label('C'),
+      ];
+
+      final result = LabelUtils.safeComputeDisplayedLabelsByMaxDisplay(
+        labels: labels,
+        maxDisplay: 2,
+      );
+
+      expect(result.displayed.length, 2);
+      expect(result.displayed.map((e) => e.displayName), ['A', 'B']);
+      expect(result.hiddenCount, 1);
+    });
+
+    test(
+        'fallback when computeDisplayedLabelsByMaxDisplay throws and labels empty',
+        () {
+      expect(
+        () => LabelUtils.safeComputeDisplayedLabelsByMaxDisplay(
+          labels: [],
+          maxDisplay: -999,
+        ),
+        returnsNormally,
+      );
+
+      final result = LabelUtils.safeComputeDisplayedLabelsByMaxDisplay(
+        labels: [],
+        maxDisplay: -999,
+      );
+
+      expect(result.displayed, isEmpty);
+      expect(result.hiddenCount, 0);
+    });
+
+    test('fallback returns first label and hiddenCount when exception occurs',
+        () {
+      final labels = [
+        label('A'),
+        label('B'),
+        label('C'),
+      ];
+
+      final result = LabelUtils.safeComputeDisplayedLabelsByMaxDisplay(
+        labels: labels,
+        maxDisplay: -1,
+      );
+
+      expect(result.displayed.length, 1);
+      expect(result.displayed.first.displayName, 'A');
+      expect(result.hiddenCount, 2);
+    });
+
+    test('fallback works correctly when only one label exists', () {
+      final labels = [label('A')];
+
+      final result = LabelUtils.safeComputeDisplayedLabelsByMaxDisplay(
+        labels: labels,
+        maxDisplay: -1,
+      );
+
+      expect(result.displayed.length, 1);
+      expect(result.displayed.first.displayName, 'A');
+      expect(result.hiddenCount, 0);
+    });
+
+    test('normal path works when maxDisplay > list size', () {
+      final labels = [
+        label('A'),
+      ];
+
+      final result = LabelUtils.safeComputeDisplayedLabelsByMaxDisplay(
+        labels: labels,
+        maxDisplay: 10,
+      );
+
+      expect(result.displayed.length, 1);
+      expect(result.hiddenCount, 0);
+    });
+  });
 }
diff --git a/test/features/label/truncate_label_test.dart b/test/features/label/truncate_label_test.dart
new file mode 100644
index 000000000..5da354161
--- /dev/null
+++ b/test/features/label/truncate_label_test.dart
@@ -0,0 +1,42 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:tmail_ui_user/features/labels/presentation/utils/label_utils.dart';
+
+void main() {
+  group('LabelUtils.truncateLabel', () {
+    test('returns original string when length <= maxLength', () {
+      const name = 'ShortLabel';
+      final result = LabelUtils.truncateLabel(name, maxLength: 16);
+      expect(result, name);
+    });
+
+    test('truncates string when length > maxLength', () {
+      const name = 'ThisIsAVeryLongLabel';
+      final result = LabelUtils.truncateLabel(name, maxLength: 16);
+      expect(result, 'ThisIsAVeryLong...');
+    });
+
+    test('works correctly with exact maxLength boundary', () {
+      const name = '1234567890123456';
+      final result = LabelUtils.truncateLabel(name, maxLength: 16);
+      expect(result, name);
+    });
+
+    test('uses custom maxLength', () {
+      const name = 'ABCDEFGH';
+      final result = LabelUtils.truncateLabel(name, maxLength: 5);
+      expect(result, 'ABCD...');
+    });
+
+    test('handles empty string gracefully', () {
+      const name = '';
+      final result = LabelUtils.truncateLabel(name, maxLength: 16);
+      expect(result, '');
+    });
+
+    test('handles maxLength = 1 (still truncates safely)', () {
+      const name = 'LongName';
+      final result = LabelUtils.truncateLabel(name, maxLength: 1);
+      expect(result, '...');
+    });
+  });
+}