The event form's state pipeline ran .flowOn(io) over the whole combine,
including the _form round-trip every keystroke depends on. That async hop
handed BasicTextField a lagging value while typing, so Compose kept
correcting the cursor to the stale position.
Scope flowOn(io) to just the calendar/prefs/settings reads and collect the
form -> state -> UI path on the main dispatcher, so keystrokes round-trip
synchronously and the cursor stays put.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Jean-Luc Makiola
9a1903e6ed