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.
Remove Bootstrap fade/in classes from the active home pane, render cards
as <article class="posts-item">, and lock list opacity/display with
!important so published posts cannot stay invisible.
Active homepage tab pane was stuck at opacity:0, and custom <posts>
elements lacked display:block, so published items rendered in HTML but
were effectively invisible. Style list cards under #index-tab-main too.
kate522
