Breadcrumbs v0.6.0

Minor Changes

• 67b3d6b: Show a section's icon in the thread header, beside the crumb it belongs to.
  Breadcrumbs leaves an empty marked span before each crumb and Icons fills it,
  since bb's SDK gives one plugin no way to render another's component. Either
  plugin without the other is unchanged.

  With no crumbs to sit beside, the header keeps one icon and chooses its owner
  the way a sidebar row does: the project's, or the section's where that project
  has no icon of its own.

  The picker no longer offers the glyphs bb draws by default for a project and for
  the personal project. A row holding one of those looked like no choice at all
  and still outranked the section's icon.

Patch Changes

• 2ff5814: Seed the screenshots from one product in two repositories, filed under a section
  of its own. The shots now picture a section icon, a section crumb, and a sidebar
  focused on one product, none of which the previous fixture could show.

• 67b3d6b: Resolve a thread's section the same way in every plugin: the nearest section
  walking up, the thread's own included. Breadcrumbs took the root's section over
  the thread's own, and Thread stages took the thread's own over any ancestor's,
  so a chain filed at more than one level could show one section's name beside
  another's icon.

• 3606c83: Move everything vendored from BB into each plugin's src/vendor/, so a reader
  can tell BB's code from the plugin's own by its path.

• 3606c83: Refresh every vendored BB component to the pinned registry release, so all
  three plugins share one vintage of BB's menus, overlays, and icons instead of
  two. Breadcrumbs and Icons were carrying components from an older release whose
  pin had been bumped without a re-vendor, which left their overlays a rewrite
  behind and their icon set six icons short.

  The four local edits those copies had accumulated are now composed rather than
  patched in, so no plugin forks BB's UI kit: menus that should stay a dropdown
  on a narrow window use BB's own compact-viewport override, destructive context
  items take the classes BB's app gives them, and the thread filter draws its own
  check and submenu chevron the way its actionable rows already did — which also
  makes its two row types finally render the same selected state.

• 3606c83: Fail the release check when a Tailwind arbitrary variant the source uses never
  reaches the built stylesheet.