Electric-vehicle (EV) makers from Tesla to Nio are shifting their focus from price cuts to developing spacious family friendly, long-range vehicles for the mainland Chinese market.The premium SUV segment has emerged as the new battlefront, as carmakers heed Beijing’s call to end a brutal price war and chase affluent consumers to improve their bottom line.Tesla, which plans to launch a six-seat Model Y on the mainland this autumn, has been overtaken by two major local rivals – Li Auto and Nio –...