An inject's payload and a flow input's starting value of those types use
JsonField instead of a one-line text field. The field can now hold no value
(shown as the placeholder; an emptied editor saves null) and checks the shape:
a record must be an object, a list an array.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013GAeg4Jo6xjZzjwy9QDWMQ