CORTINA D’AMPEZZO, Italy—An ear-to-ear smile. No regrets. And another medal wrapped around her neck. What a refreshing sight it was to see Mikaela Shiffrin basking in the afternoon sunlight after another successful day in the Italian Dolomites. Make that a successful world championships. After collecting her fourth medal in as many races Saturday by taking bronze in the concluding slalom, the American skier was asked if she was content with how everything went over these two weeks. “Yes. That’s a huge, resounding yes,” Shiffrin replied. “I mean that’s incredible. I had planned for four races and I thought, ‘OK, that’s four chances for a medal. Hopefully, somewhere in these two weeks I can do some good skiing.’ And I’m really proud of so much of the skiing I did.” It wasn’t just the skiing, though. Seemingly weighed down by her own expectations and outside pressure at past worlds and Olympics, …