- Introduced a new `/api/admin/maintenance` route for administrative maintenance tasks, requiring admin authorization. - Implemented the `DeleteAsync` method in `IFileStorage` to allow for the deletion of files associated with closed support tickets. - Updated API documentation to include details about the new maintenance operations and their effects on closed tickets. - Enhanced frontend routing to include the new maintenance section in the admin panel, improving navigation for administrators. - Added localization support for maintenance-related actions in both Russian and English.