Any thoughts as to when and how Jesus was anointed?
Just my own thought. I believe he would have been already anointed at the time of, or before the first miracle Allaah(awt) performed through him. Besides his miraculous birth the earliest miracle I can find is:
Quran Surah 19. Mary
27. At length she brought the (babe) to her people, carrying him (in her arms). They said: "O Mary! truly an amazing thing hast thou brought!
28. "O sister of Aaron! Thy father was not a man of evil, nor thy mother a woman unchaste!"
29. But she pointed to the babe. They said: "How can we talk to one who is a child in the cradle?"
30. He said: "I am indeed a servant of Allah.
He hath given me revelation and made me a prophet;
31. "And He hath made me blessed wheresoever I be, and hath enjoined on me Prayer and Charity as long as I live;
32. "(He) hath made me kind to my mother, and not overbearing or miserable;
33. "So peace is on me the day I was born, the day that I die, and the day that I shall be raised up to life (again)"!
34. Such (was) Jesus the son of Mary: (it is) a statement of truth, about which they (vainly) dispute.