feat: enhance settings and backup functionality

- Updated status descriptions in `SettingsIndexPageClient` to reflect current functionality.
- Added a new backup management section in settings for better user access.
- Modified `BackupService` to include backup type in filenames, improving clarity and organization.
- Enhanced backup file parsing to support both new and old filename formats, ensuring backward compatibility.

components/settings/SettingsIndexPageClient.tsx

@@ -17,7 +17,7 @@ export function SettingsIndexPageClient({ initialPreferences }: SettingsIndexPag
       icon: '⚙️',
       title: 'Paramètres généraux',
       description: 'Interface, thème, préférences d\'affichage',
-      status: 'En développement'
+      status: 'Fonctionnel'
     },
     {
       href: '/settings/integrations',
@@ -26,12 +26,19 @@ export function SettingsIndexPageClient({ initialPreferences }: SettingsIndexPag
       description: 'Jira, GitHub, Slack et autres services externes',
       status: 'Fonctionnel'
     },
+    {
+      href: '/settings/backup',
+      icon: '💾',
+      title: 'Sauvegardes',
+      description: 'Gestion des sauvegardes automatiques et manuelles',
+      status: 'Fonctionnel'
+    },
     {
       href: '/settings/advanced',
       icon: '🛠️',
       title: 'Paramètres avancés',
-      description: 'Sauvegarde, logs, debug et maintenance',
-      status: 'Prochainement'
+      description: 'Logs, debug et maintenance système',
+      status: 'Fonctionnel'
     }
   ];