When “Yellowjackets” star Samantha Hanratty walks into one of her favorite vegan restaurants to meet me for a late lunch, I’ll admit that I don’t immediately recognize her. Gone are the trademark glasses and mousy-brown curls of teen Misty Quiqley, the character she plays on the Showtime hit. Sammi, as her friends and family call her, is decidedly more glamorous and grown-up in blue-red lipstick and a matching sweater. After greeting each other with a big hug — she’s a hugger — we sit down to talk about poison, mayhem, and kidnapping. In other words, just a typical day at work on her hit series.