The file pickers read event.target.files but reset event.target.value = ""
before the file was actually used: in the AI composer the value reset ran
before React's deferred setState updater read the (now-empty) live FileList,
so no chip appeared; in Messages the reset ran before the length check, so it
returned early. Snapshot the files into a plain array synchronously, before the
reset. This is why attaching seemed to fail (no badge) — especially while typing.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Khalid Abdi
705d4b5719