feat: refactor daily task management with new pending tasks section

- Added `PendingTasksSection` to `DailyPageClient` for displaying uncompleted tasks.
- Implemented `getPendingCheckboxes` method in `DailyClient` and `DailyService` to fetch pending tasks.
- Introduced `getDaysAgo` utility function for calculating elapsed days since a date.
- Updated `TODO.md` to reflect the new task management features and adjustments.
- Cleaned up and organized folder structure to align with Next.js 13+ best practices.

src/services/daily.ts

@@ -257,6 +257,76 @@ export class DailyService {
       return formatDateForAPI(checkbox.date);
     });
   }
+
+  /**
+   * Récupère toutes les checkboxes non cochées (tâches en attente)
+   */
+  async getPendingCheckboxes(options?: {
+    maxDays?: number;
+    excludeToday?: boolean;
+    type?: DailyCheckboxType;
+    limit?: number;
+  }): Promise<DailyCheckbox[]> {
+    const today = normalizeDate(getToday());
+    const maxDays = options?.maxDays ?? 30;
+    const excludeToday = options?.excludeToday ?? true;
+    
+    // Calculer la date limite (maxDays jours en arrière)
+    const limitDate = new Date(today);
+    limitDate.setDate(limitDate.getDate() - maxDays);
+
+    // Construire les conditions de filtrage
+    const whereConditions: {
+      isChecked: boolean;
+      date: {
+        gte: Date;
+        lt?: Date;
+        lte?: Date;
+      };
+      type?: DailyCheckboxType;
+    } = {
+      isChecked: false,
+      date: {
+        gte: limitDate,
+        ...(excludeToday ? { lt: today } : { lte: today })
+      }
+    };
+
+    // Filtrer par type si spécifié
+    if (options?.type) {
+      whereConditions.type = options.type;
+    }
+
+    const checkboxes = await prisma.dailyCheckbox.findMany({
+      where: whereConditions,
+      include: { task: true },
+      orderBy: [
+        { date: 'desc' },
+        { order: 'asc' }
+      ],
+      ...(options?.limit ? { take: options.limit } : {})
+    });
+
+    return checkboxes.map(this.mapPrismaCheckbox);
+  }
+
+  /**
+   * Archive une checkbox (marque comme archivée sans la cocher)
+   */
+  async archiveCheckbox(checkboxId: string): Promise<DailyCheckbox> {
+    // Pour l'instant, on utilise un champ text pour marquer comme archivé
+    // Plus tard on pourra ajouter un champ dédié dans la DB
+    const checkbox = await prisma.dailyCheckbox.update({
+      where: { id: checkboxId },
+      data: { 
+        text: (await prisma.dailyCheckbox.findUnique({ where: { id: checkboxId } }))?.text + ' [ARCHIVÉ]',
+        updatedAt: new Date()
+      },
+      include: { task: true }
+    });
+
+    return this.mapPrismaCheckbox(checkbox);
+  }
 }
 
 // Instance singleton du service