A young mum from Cardiff says she’s optimistic about her family’s future after technology created by a UK startup enabled her to cut out addictive painkillers to cope with the debilitating effects of a rare genetic disorder. Clare Smith, her sister Lucy Gardener and middle daughter, Chloe, all have Alagille Syndrome, which can affect the liver, heart, skeleton, eyes and kidneys and can be fatal. Clare, 33, who has heart and spinal problems, said: “My condition means that I get…