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

lang/es.json

@@ -106,6 +106,8 @@
     "Language": "Idioma",
     "English": "Inglés",
     "Spanish": "Español",
+    "French": "Francés",
+    "Russian": "Ruso",
     "Select language": "Seleccionar idioma",
     "Notifications": "Notificaciones",
     "Permissions": "Permisos",
@@ -395,5 +397,34 @@
     "My Projects": "Mis proyectos",
     "Editable": "Editable",
     "Name of responsible": "Nombre del responsable",
-    "Select template...": "Seleccionar plantilla..."
+    "Select template...": "Seleccionar plantilla...",
+    "Tasks": "Tareas",
+    "Task": "Tarea",
+    "New Task": "Nueva tarea",
+    "Create Task": "Crear tarea",
+    "Edit Task": "Editar tarea",
+    "Delete Task": "Eliminar tarea",
+    "Task title": "Título de la tarea",
+    "Task description": "Descripción de la tarea",
+    "Due date": "Fecha de vencimiento",
+    "Start date": "Fecha de inicio",
+    "Estimated hours": "Horas estimadas",
+    "Actual hours": "Horas reales",
+    "Assigned to": "Asignado a",
+    "Parent task": "Tarea padre",
+    "Subtasks": "Subtareas",
+    "No subtasks": "Sin subtareas",
+    "Add subtask": "Añadir subtarea",
+    "Comments": "Comentarios",
+    "Add comment": "Añadir comentario",
+    "Write a comment...": "Escribe un comentario...",
+    "No comments yet": "No hay comentarios aún",
+    "Task created": "Tarea creada",
+    "Task updated": "Tarea actualizada",
+    "Task deleted": "Tarea eliminada",
+    "Status changed": "Estado cambiado",
+    "Overdue": "Vencida",
+    "Due today": "Vence hoy",
+    "Progress": "Progreso",
+    "Order": "Orden"
 }