feat(tasks): complete task management system with Kanban, Calendar, notifications

- Add Task model with subtasks, priorities, status transitions, dates, hours
- Add Comment polymorphic model for tasks/issues/projects
- Livewire components: TaskManager (list+filters), TaskForm (modal), TaskDetail, TaskKanban (drag&drop), TaskCalendar (FullCalendar)
- TaskPolicy with permissions (view/create/edit/delete/assign/manage all)
- Notifications: assigned, status change, overdue, comment added
- Daily overdue notification job scheduled
- Dashboard widget unifies IssueTask + Task
- i18n: en/es/fr/ru (393 keys each)
- Routes, navigation, offline sync support
- 101 tests passing, Pint compliant on new files

app/Livewire/Users/UserForm.php

@@ -50,6 +50,8 @@ class UserForm extends Component
     public array $languages = [
         'es' => ['name' => 'Español', 'flag' => 'es.svg'],
         'en' => ['name' => 'English', 'flag' => 'gb.svg'],
+        'fr' => ['name' => 'Français', 'flag' => 'fr.svg'],
+        'ru' => ['name' => 'Русский', 'flag' => 'ru.svg'],
     ];
 
     public function mount(?User $user = null): void