/**
 * The value submitted for a single form field. Shape depends on the field type:
 * - `text`, `email`, `phone`, `url`, `textarea`, `select`, `radio` → string
 * - `number` → number
 * - `checkbox` (single) → boolean
 * - `checkbox` (multi), `multiselect` → array of strings
 * - Skipped optional field → null
 */
export type FormSubmissionAnswer = string | number | boolean | string[];