Barry Bonds’ former personal shopper became the first and only one of the government’s 23 witnesses at his federal trial to say she saw the all-time home run leader getting an injection from his trainer. Kathy Hoskins was the first eyewitness to testify that Bonds’ personal trainer, Greg Anderson, who was later convicted of dealing steroid, injected the slugger. She said Thursday that the scene unfolded at Bonds’ well-appointed Bay Area home in 2002.