Farfetch is flexing its multitasking muscle, linking with personal styling start-up Wishi to bring AI and human-vetted style recommendations to shoppers. The new service, which takes a page from the Stitch Fix playbook, brings new product suggestions to shoppers — as well as a new kind of exposure for brands on the platform — and fosters closer ties between customers and Farfetch, which gains a new trove of data to boot.