New York City — Macy’s Inc. has unveiled plans to overhaul its flagship Herald Square store at the corner of 34th Street and Seventh Avenue in Midtown Manhattan. The plan would add a commercial office tower atop the store. The size and design features of the office component were not disclosed. The plan includes a private investment totaling $235 million by Macy’s that would modernize the public spaces around the flagship store, including upgraded subway access, improved transit connections and pedestrian-friendly and car-free streetscapes at Broadway Plaza and Herald Square. …