message: feat: change default field value to undefiend
diff: @@ -142,7 +142,7 @@ export function useField(fieldName: MaybeReactive<string>, rules: RuleExpression
  */
  function normalizeOptions(opts: Partial<FieldOptions> | undefined): FieldOptions {
  const defaults = () => ({
  - value: ref(null),
  + value: ref(undefined),
  immediate: false,
  bails: true,
  rules: '',
  