feat(DailyService): implement toggleCheckbox method for direct checkbox state updates

src/services/task-management/daily.ts

@@ -130,6 +130,27 @@ export class DailyService {
     return this.mapPrismaCheckbox(checkbox);
   }
 
+  /**
+   * Toggle l'état d'une checkbox par son ID (indépendant de la date)
+   */
+  async toggleCheckbox(checkboxId: string): Promise<DailyCheckbox> {
+    const existing = await prisma.dailyCheckbox.findUnique({
+      where: { id: checkboxId },
+    });
+
+    if (!existing) {
+      throw new BusinessError('Checkbox non trouvée');
+    }
+
+    const updated = await prisma.dailyCheckbox.update({
+      where: { id: checkboxId },
+      data: { isChecked: !existing.isChecked, updatedAt: new Date() },
+      include: { task: true, user: true },
+    });
+
+    return this.mapPrismaCheckbox(updated);
+  }
+
   /**
    * Supprime une checkbox
    */