HONG KONG — Hong Kong’s highest court ordered Jimmy Lai, the pro-democracy publishing tycoon, back to jail on Thursday, just days after he was freed on bail, the latest twist in the continuing, flip-flopping legal battle over one of the city’s most prominent antigovernment figures.The fate of Mr. Lai, the most prominent person to be charged under Hong Kong’s sweeping new national security law, has been seen by some as a barometer of the independence of the city’s judiciary. After being accused of colluding with “foreign forces,” including by calling for sanctions against Hong Kong, Mr. …
