PHILADELPHIA — Bryce Harper’s thumb surgery went as planned and without any complications, a source said Wednesday, and the Phillies star’s expectation of a mid-August return remains possible. The Phillies provided scant details about the procedure, including what it entailed, which doctor performed it and where it took place. Interim manager Rob Thomson said only that it “went very well and we expect him to be back at the end of the year.” Harper is expected to discuss the surgery and the recovery timeline when he rejoins the Phillies later this week. The post-surgery optimism is consistent w…