For the better part of a year, we’ve been hearing about Project Mulberry : Apple’s AI-powered health coach. Back in February, it was reported that these efforts had been scaled back. According to Bloomberg’s Mark Gurman , the features should still be on track for iOS 27, though they may not release until later in the cycle. On the other hand, Apple is apparently going to greatly improve Apple Watch heart-rate tracking with watchOS 27, which could tie in nicely with Apple’s eventual health coach. Improved heart-rate tracking This weekend’s Power On newsletter is light on details for how exactly Apple Watch heart-rate tracking will be improved, but here’s what Gurman has to say: This year’s watchOS 27 update will focus largely on stability, performance and smaller refinements, rather than introducing major new capabilities.…