The homepage utility .flex { display: flex !important } out-ranked the
legacy wide-mode rule .site-layout-1 .posts-item:not(.card)
{ display: inline-flex; width: calc(50% - 16px) }, so with the sidebar
collapsed (no widgets) every list item rendered at half width stacked
into one column with an empty right half.
Zibll's .flex utility carries no !important; drop it so the wide-mode
rule wins the cascade, and regenerate the CSS bundles.
Verification: node --test tests/widget-system/*.test.cjs (242/243, the
toast-contract failure is pre-existing); rebuilt bundle contains no
display:flex!important on .flex.
kate522