/**
 * 作废原因选填弹窗（依赖基础库 editable Modal）。
 * @returns {Promise<string|null>} null=取消；字符串=确认（可空）
 */
export function promptOptionalCancelReason(options = {}) {
  const {
    title = '作废确认',
    content = '作废原因选填，可直接确认。',
    confirmText = '作废',
    confirmColor = '#ef4444'
  } = options
  return new Promise((resolve) => {
    uni.showModal({
      title,
      content,
      editable: true,
      placeholderText: '选填作废原因',
      confirmText,
      confirmColor,
      success: (res) => {
        if (!res.confirm) {
          resolve(null)
          return
        }
        resolve(String(res.content || '').trim())
      },
      fail: () => resolve(null)
    })
  })
}