The field's input carried min-w-16 (64px). Flex line-packing sizes a flex item
at its min-width, so in a narrow rail field (~202px) one chip (~119px) + the
64px-reserved input + the chevron overflowed the line, wrapping the chevron
down while the (grown, empty-looking) input filled the first line — the "breaks
to two rows even though it'd fit" glitch seen on the Plex Collection widget and
the feed's channel picker (both are Combobox). Lowering the floor to min-w-8
(32px) keeps chip + input + chevron on one line; flex-1 still grows the input to
fill the remaining width. Verified in-browser: field height 54px→36px (one row).
peter
f8e144a658