As Empress Navier on “The Remarried Empress,” Shin Min-a rules the screen in gowns that cost as much as a small car. The Disney+ original series released its first four episodes on Wednesday. It has drawn attention for its lavish imperial costumes as much as for its cast. Several of the gowns worn by lead actor Shin Min-a are high-end designer pieces that range from several million won to well over 10 million won ($7,400) each. Directed by Cho Soo-won and produced by Studio N, the series is base