Last season, the rising tide of Covid-19 lapped at fashion’s heels as the style set moved from city to city, show to show. In New York, Chinese designers, stuck at home, missed their collection bow; as Milan began, one Italian had died of the virus. By the end of that week, Armani had decided to hold a show with no audience. In Paris, parties were canceled, masks handed out and ushers stood tall with big vats of hand sanitizer. Then, just after everyone scattered for home, the pandemic began.