Wire settings-driven sidebar visibility and body site-layout classes, replace content-layout CSS grid with Zibll float geometry, move sidebar DOM to content-wrap sibling across single/archive/page/home, and add post meta show_layout overrides.
去掉 generic sidebar 的 prepend patch、author-bar ambient 回退, 以及 homepage section 多余 wrapper,保持主线闭环更干净。