Per mara's steer on #3053 ("chip/pill/badge is the same if you squint
... theme unification is part of the goal" then "make it common css
instead of component, thats fine. but make them look unified (not as
much per usage css)"): shared CSS, not a JS component.
New @hive/shared/pill.css defines two classes, `.hive-pill` (primary
state chips) and `.hive-pill-sm` (secondary meta chips) — border/
border-radius/padding/font-size/letter-spacing (colour stays per-site,
the meaningful semantic part). Every render call site across dashboard
(swarm.js/core.js/builds.js) and agent (index.html/app.js) now carries
one of the two shared classes directly, alongside its own existing
semantic-colour modifier class.
Second cut of this PR, per argus's approve + mara's follow-up review
comment on the first cut: the first version instead enumerated every
legacy classname (`.badge`, `.status-badge`, `.header-pill`, etc.)
straight into pill.css's own selector groups so no call sites needed
touching. Mara's correction: that just relocates the duplication
rather than removing it, and the shared CSS shouldn't have to keep
naming every consumer. This version does the real rename instead.
Most visible consequence, unchanged from the first cut: dashboard's
`.badge` family moves off its own shape (2px square corners, uppercase,
tighter padding) onto the shared rounded-pill shape + agent's "sm" tier
sizing. `npm run build` clean across all three packages; verified the
compiled bundles carry the new classnames at every call site (dashboard
JS, agent index.html + app.js), not just the source tree.
Fixes#3053