Background refresh resets input text while I'm typing

[SGudbrandsson]

Problem

Sometimes while I am typing in an input field, a background refresh/poll resets the field contents. This wipes out what I was writing and is a bad UX.

Expected

If a field is focused, background updates must never overwrite its value.

Fix direction

• Any periodic state refresh that touches input values should check document.activeElement (or equivalent) and skip the update for focused fields.
• Alternatively, treat the input as uncontrolled while focused, reconciling only on blur.

Acceptance criteria

• Typing in any input is never interrupted by a background refresh.
• Focused fields retain their user-entered value until blurred or explicitly submitted.