namespace backend.Devices; public class DeviceConfig { public Guid DeviceId { get; set; } public string SystemPrompt { get; set; } = ""; public string Voice { get; set; } = ""; public string Model { get; set; } = ""; public int IdleTimeoutSeconds { get; set; } = 30; public string EnabledToolsJson { get; set; } = "[\"end_session\",\"get_current_time\",\"set_volume\"]"; }