Salvatore Ferragamo is hosting a month-longpop-up shop inside the Wallis Annenberg Center for Performing Arts in Beverly Hills as a tribute to the city of Los Angeles in which the company’s founder, Salvatore Ferragamo, opened his first leather-shoe shop nearly 100 years ago. The new 2.5-acre arts center—which encompasses a 500-seat theater, a sculpture garden, an outdoor terrace for events, and courtyards—occupies the historic Beverly Hills Post Office, which opened in 1934 and was completely restored for the…