In grouped mode the sidebar indents a project's thread rows with a nested
SidebarMenu carrying ml-4, but SidebarMenu defaults to w-full. Width 100%
plus a 16px left margin overflows the sidebar by 16px, so the absolutely
positioned row kebab (right-1) lands past the visible edge and gets
clipped. The Archived group nests one level deeper and overflows 32px,
hiding its kebabs entirely.
Swap w-full for w-auto on both indented menus so the block-level flex
container fills the remaining width minus its margin. A dom test renders
ProjectsSection in grouped mode from seeded query caches and pins that
every indented menu drops w-full while the root menu keeps it.
Fixes#5681
ded0f0b696