After stumbling out of the starting gate in Big Tech’s pivotal race to capitalize on artificial intelligence, Apple will try to regain its footing Monday at its annual Worldwide Developers Conference. The pre-summer rite, which attracts thousands of developers to Apple’s Silicon Valley headquarters, is expected to be more subdued than the feverish anticipation that surrounded the event during the previous two years. In 2023, Apple unveiled a mixed-reality headset that has been little more than a niche product, and last year WWDC trumpeted its first major foray into the AI craze with an array of new features highlighted by the promise of a smarter and more versatile version of its virtual assistant, Siri.