Malaysia’s largest coffee chain has thrown its support behind a barista involved in a viral confrontation with a customer, saying it has launched a full investigation and will stand by the employee while reviewing the incident. Zus Coffee confirmed on Monday that it had begun an internal investigation after a 14-second video of the altercation, believed to have taken place on Sunday at one of its outlets, drew millions of views on TikTok and sparked intense online debate. In the video, a female…