SACRAMENTO, Calif. (AP) — California, home to some of the largest technology companies in the world, would be the first U.S. state to require mental health warning labels on social media sites if lawmakers pass a bill introduced Monday. The legislation sponsored by state Attorney General Rob Bonta is necessary to bolster safety for children online, supporters say, but industry officials vow to fight the measure and others like it under the First Amendment. Warning labels for social media gained swift bipartisan support from dozens of attorneys general, including Bonta, after U.S.