Tasks Module Stage 3: Checklists

- Add migration for task_checklists table
- Create TaskChecklistModel with CRUD methods
- Add TaskService methods for checklist operations
- Add API routes for checklist endpoints
- Add controller methods for checklist CRUD
- Add UI section in task view with AJAX handlers

app/Modules/Tasks/Config/Routes.php

@@ -32,6 +32,11 @@ $routes->group('tasks', ['filter' => ['org', 'subscription:tasks'], 'namespace'
     $routes->post('(:num)/subtasks', 'TasksController::addSubtask/$1');
     $routes->post('(:num)/subtasks/(:num)/toggle', 'TasksController::toggleSubtask/$1/$2');
     $routes->post('(:num)/subtasks/(:num)/delete', 'TasksController::deleteSubtask/$1/$2');
+
+    // Checklists API
+    $routes->post('(:num)/checklists', 'TasksController::addChecklistItem/$1');
+    $routes->post('(:num)/checklists/(:num)/toggle', 'TasksController::toggleChecklistItem/$1/$2');
+    $routes->post('(:num)/checklists/(:num)/delete', 'TasksController::deleteChecklistItem/$1/$2');
 });
 
 // API Routes для Tasks