Compiles mailglass_admin/assets/css/app.css to
mailglass_admin/priv/static/app.css via the tailwind Hex package —
zero Node toolchain required.
Usage
mix mailglass_admin.assets.buildRun after editing assets/css/app.css or after touching any HEEx
source under lib/mailglass_admin/ (Tailwind's content scanner walks
those files to determine which utility classes to emit).
CI runs this followed by git diff --exit-code priv/static/ per
CONTEXT D-04 / PREV-06 — any drift between the committed bundle and
the bundle produced from the current source fails merge.