WASHINGTON — The Supreme Court wrestled Monday with state laws that could affect how Facebook, TikTok, X, YouTube and other social media platforms regulate content posted by their users. The cases are among several this term in which the justices could set standards for free speech in the digital age.In nearly four hours of arguments, several justices questioned aspects of laws adopted by Republican-dominated legislatures and signed by Republican governors in Florida and Texas in 2021. But they seemed wary of a broad …