refactor: date utils and all calls

src/services/tasks.ts

@@ -1,6 +1,7 @@
 import { prisma } from './database';
 import { Task, TaskStatus, TaskPriority, TaskSource, BusinessError, DailyCheckbox, DailyCheckboxType } from '@/lib/types';
 import { Prisma } from '@prisma/client';
+import { getToday } from '@/lib/date-utils';
 
 /**
  * Service pour la gestion des tâches (version standalone)
@@ -126,12 +127,12 @@ export class TasksService {
       status: updates.status,
       priority: updates.priority,
       dueDate: updates.dueDate,
-      updatedAt: new Date()
+      updatedAt: getToday()
     };
 
 
     if (updates.status === 'done' && !task.completedAt) {
-      updateData.completedAt = new Date();
+      updateData.completedAt = getToday();
     } else if (updates.status && updates.status !== 'done' && task.completedAt) {
       updateData.completedAt = null;
     }