The reset I added guards on `hidden === 0`, and `hidden` can be NEGATIVE.
`useChipOverflowFit` keeps `visible` in state and re-decides in a layout effect,
so the render in which the chip set SHRINKS still carries the previous
measurement — delete three tags under an open "+N" and `chips.length - visible`
goes to -2, the equality never matches, and the flag survives the one window the
reset exists to close. The next re-fit brings the menu back on its own, which is
the original defect with an extra step. Clamped at all three lanes, with a test
that drives the shrink through the stale value.
Also: the Scheduler characterization banner said "the four tests below" and now
sits above six, the last two of which are genuine regression guards for the
range-refusal fix. A future mutation check would have read it, seen them go red,
and concluded the harness was broken rather than that the guard worked.
peter
d924c665f8