The <input> carried only floating-ui's reference ref, so the component's own
inputRef stayed null. The field container's onMouseDown then preventDefault()-ed
every press (its `e.target !== inputRef.current` guard was always true) and the
compensating inputRef.current?.focus() was a no-op — so clicking the box opened
the list but never focused the input, and mouse users could not type to filter.
Tab focus still worked, which is why it read as 'click, can't type'.
Feed a merged callback ref that assigns the node to both floating-ui's
setReference and inputRef. Fixes the Channel, Your tags, Topic, and Language
sidebar filters at once (all use Combobox); the channel list's 50-row cap is now
reachable past 50 via search. Single-select commit no longer re-focuses (that now
actually fires and would re-open the just-closed list). Regression test presses
the field chrome and asserts the input receives focus.
Verified live: clicking the Channel field focuses it and typing 'cold' narrows
the list to ColdFusion / wehatethecold.
peter
d2193ccd1b