Apple Inc.’s upcoming Worldwide Developers Conference will do little to assuage fears that the iPhone maker is a laggard in AI. Instead, the event will focus on design and productivity enhancements for its long-established operating system franchises.The company’s keynote address, which begins at 10 a.m. Pacific time on Monday, will introduce redesigned software interfaces for the iPhone, iPad, Mac, Apple TV and Apple Watch, in addition to more minor tweaks to the Vision Pro headset....