feat: implement backup management features

- Added `createBackupAction`, `verifyDatabaseAction`, and `refreshBackupStatsAction` for handling backup operations.
- Introduced `getBackupStats` method in `BackupClient` to retrieve daily backup statistics.
- Updated API route to support fetching backup stats.
- Integrated backup stats into the `BackupSettingsPage` and visualized them with `BackupTimelineChart`.
- Enhanced `BackupSettingsPageClient` to manage backup stats and actions more effectively.

src/app/api/backups/route.ts

@@ -17,6 +17,16 @@ export async function GET(request: NextRequest) {
       });
     }
 
+    if (action === 'stats') {
+      const days = parseInt(searchParams.get('days') || '30');
+      const stats = await backupService.getBackupStats(days);
+      
+      return NextResponse.json({
+        success: true,
+        data: stats
+      });
+    }
+
     console.log('🔄 API GET /api/backups called');
     
     // Test de la configuration d'abord