(iStock / Getty Images) The Slack messages began arriving at 5:47 a.m. on a recent Monday. Three sales proposals had gone out the previous week and none of the team members had scheduled follow-ups. The reminders were crisp, professional and relentless - and they hadn’t been sent by a human.They came from Junior, an AI employee from the startup Kuse AI.Xiankun Wu, the company’s founder, is creating the kind of workplace that feels both inevitable and unsettling. He’s offering a new type of colleague who is entirely virtual and behaves uncannily like the most driven new hire you’ve ever worked...