Neighbors from Calle del Embarcadero are appealing the Planning Commission’s decision to approve a coastal permit for a proposed residence in Stinson Beach. The residence, to be built by realtor Heidi Hjorth of Mill Valley, would be the largest development on the calle and has been opposed by neighbors since August. Critics have argued that the 1,400-square foot residence with an attached 535-square foot garage will exacerbate flooding in the area (the lot, now vacant,…