feat: add related todos functionality in task editing

- Implemented `RelatedTodos` component in `EditTaskForm` to display and manage related todos for a task.
- Updated `TasksClient` to fetch daily checkboxes related to a task.
- Enhanced `TasksService` with a method to retrieve related daily checkboxes from the database.
- Added functionality to create new todos linked to tasks in the daily actions.
- Marked the task for displaying related todos in the task editing interface as complete in TODO.md.

clients/tasks-client.ts

@@ -1,5 +1,5 @@
 import { httpClient } from './base/http-client';
-import { Task, TaskStatus, TaskPriority, TaskStats } from '@/lib/types';
+import { Task, TaskStatus, TaskPriority, TaskStats, DailyCheckbox } from '@/lib/types';
 
 export interface TaskFilters {
   status?: TaskStatus[];
@@ -65,6 +65,14 @@ export class TasksClient {
     return httpClient.get<TasksResponse>('/tasks', params);
   }
 
+  /**
+   * Récupère les daily checkboxes liées à une tâche
+   */
+  async getTaskCheckboxes(taskId: string): Promise<DailyCheckbox[]> {
+    const response = await httpClient.get<{ data: DailyCheckbox[] }>(`/tasks/${taskId}/checkboxes`);
+    return response.data;
+  }
+
   // Note: Les méthodes createTask, updateTask et deleteTask ont été migrées vers Server Actions
   // Voir /src/actions/tasks.ts pour createTask, updateTask, updateTaskTitle, updateTaskStatus, deleteTask
 }