Meta Platforms just offered a glimpse at what it thinks the future of work looks like: training and supervising artificial-intelligence systems to do what used to be your job. And that’s if you still have a job at all. The social-media company has been unusually aggressive, even by the standards of Silicon Valley, at pushing to incorporate AI into its employees’ workflows and using it to streamline and accelerate its operations. Already this year, it has started grading employees in performance reviews on their AI use; created ultraflat teams with almost no managers; and begun to develop a so-called CEO agent to…