TF-3586: Upgrade Flutter to 3.27.4

lib/features/mailbox/presentation/model/mailbox_actions.dart

@@ -154,7 +154,7 @@ extension MailboxActionsExtension on MailboxActions {
       case MailboxActions.delete:
         return AppColor.redFF3347;
       default:
-        return AppColor.gray424244.withOpacity(0.72);
+        return AppColor.gray424244.withValues(alpha: 0.72);
     }
   }
 
@@ -163,7 +163,7 @@ extension MailboxActionsExtension on MailboxActions {
       case MailboxActions.delete:
         return AppColor.redFF3347;
       default:
-        return AppColor.gray424244.withOpacity(0.9);
+        return AppColor.gray424244.withValues(alpha: 0.9);
     }
   }
 

lib/features/mailbox/presentation/model/mailbox_categories.dart

@@ -42,8 +42,6 @@ extension MailboxCategoriessExtension on MailboxCategories {
         return categoriesExpandMode.personalFolders;
       case MailboxCategories.teamMailboxes:
         return categoriesExpandMode.teamMailboxes;
-      default:
-        return ExpandMode.COLLAPSE;
     }
   }
 }

lib/features/mailbox/presentation/widgets/empty_mailbox_popup_dialog_widget.dart

@@ -72,7 +72,7 @@ class _EmptyMailboxPopupDialogWidgetState extends State<EmptyMailboxPopupDialogW
             color: AppColor.steelGrayA540,
           ),
           backgroundColor: _visible
-            ? Theme.of(context).colorScheme.outline.withOpacity(0.08)
+            ? Theme.of(context).colorScheme.outline.withValues(alpha: 0.08)
             : Colors.transparent,
           padding: EmptyMailboxPopupDialogWidgetStyles.emptyButtonPadding,
           onTapActionCallback: () => _setVisible(true),

lib/features/mailbox/presentation/widgets/label_mailbox_item_widget.dart

@@ -147,7 +147,7 @@ class _LabelMailboxItemWidgetState extends State<LabelMailboxItemWidget> {
                   ? const EdgeInsets.all(3)
                   : TrailingMailboxItemWidgetStyles.menuIconPadding,
               backgroundColor: _morePopupMenuVisible
-                  ? Theme.of(context).colorScheme.outline.withOpacity(0.08)
+                  ? Theme.of(context).colorScheme.outline.withValues(alpha: 0.08)
                   : TrailingMailboxItemWidgetStyles.menuIconBackgroundColor,
               onTapActionAtPositionCallback: (position) {
                   if (!_responsiveUtils.isScreenWithShortestSide(context)) {