Owner-directed placement wave (2026-09-20): the bottom-left stack
overflowed the composer in narrow windows, and the pill chrome was
too prominent for a passive number.
- The cost surface is now JUST a number (cumulative dollars) top
right, below the actions row — no pill container, hover-highlight
kept, dropdown breakdown kept, viewport-capped + scrollable.
- Same dismiss pattern as the settings gear: outside click or Escape
closes (shared usePopoverDismiss; two dropdowns never open at once).
- Running-pipeline pills moved under the cost number in the same
top-right column — one right-aligned column grows downward from the
top, so no window width can push chrome over the composer.