A Bay Area coffee boss tied to a past firestorm of antisemitism has vanished without a trace, and cops say the clock is ticking. Amy Hillyard, 52, co-owner of the Farley’s coffee chain, disappeared earlier this week. She was last spotted around 2 p.m. Wednesday on Radnor Road in Oakland’s Cleveland Heights neighborhood, authorities said. Police say Hillyard is considered “at risk” due to a medical condition, intensifying fears as the search drags on. She’s described as 5-foot-4, roughly 120