Visitors to Shanghai Disneyland were barred from leaving on Monday until tests cleared them of Covid-19 after an infected person was traced to the theme park, the second time people have been locked inside due to China’s zero-tolerance virus approach. Patrons were told they could leave once they tested negative for the virus, the local government said in a statement after the facility was shut earlier in the day. Everyone was tested and the park is now empty, a spokesperson for Walt Disney Co. told Bloomberg News early Tuesday China time. The shutdown came after a woman who visited Shanghai…