/** 解析角色卡并返回预览（不写入数据库） */
export default defineEventHandler(async (event) => {
  getProject(param(event))
  const form = await readMultipartFormData(event)
  const file = form?.find(f => f.name === 'file')
  if (!file?.data?.length) throw createError({ statusCode: 400, message: '请上传角色卡文件（PNG 或 JSON）' })
  try {
    const card = parseCardFile(file.data, file.filename)
    const { raw: _raw, ...rest } = card
    return { ...rest, isPng: file.data[0] === 0x89, filename: file.filename ?? '' }
  }
  catch (err) {
    throw createError({ statusCode: 400, message: (err as Error).message })
  }
})