OAKLAND, Calif. — Nearly a year after the city’s last police chief was placed on leave ahead of his eventual firing, the two political forces responsible for replacing him still do not appear to be on the same page. One of those power players, a police oversight body comprised of civilian volunteers, is once again seeking applications for the chief job instead of drawing from an existing applicant pool — effectively rebooting a search that was expected to conclude sometime around the new year but now won’t wrap up until at least March. The reset came days after Mayor Sheng Thao, who will make …