An app launched by a former Disney star that lets users speak with AI versions of their dead relatives drew jeers online, with social media users calling the tech “vile,” “demonic” and reminiscent of the dystopian sci-fi show “Black Mirror.” Calum Worthy, a Canadian actor known for Disney’s 2011-2016 “Austin & Ally,” posted an ad for his app 2wai last week on X. The clip quickly racked up more than 40 million views — and dozens of comments calling for the app to be taken down. “This is one of