Function buildNextInput

Headless callback normalization and submit-planning helpers.

buildNextInput(
    node: JourneyNode,
    values: JourneyFormValues,
    handledCallbackTypes?: ReadonlySet<any>,
): JourneyBuildNextInputResult
Builds a next() payload from normalized callback fields and form values.
Parameters
- node: JourneyNode
  Journey node from useJourney.
- values: JourneyFormValues
  Form values keyed by normalized field id.
- OptionalhandledCallbackTypes: ReadonlySet<any>
  Callback types already handled by the app via native integration. Matching integration_required fields are excluded from submit issues so canSubmit reflects true readiness.
Returns JourneyBuildNextInputResult
Submit planning result with payload and issues.
- Defined in packages/journey/src/callbackHelpers.ts:452