Function exportConversation

src/utils/conversationExport.ts:143–174

(
  title: string,
  messages: ExportMessage[],
  createdAt: number,
  format: ExportFormat,
  labels: ExportLabels
)

 * 导出对话到下载目录
 */
export async function exportConversation(
  title: string,
  messages: ExportMessage[],
  createdAt: number,
  format: ExportFormat,
  labels: ExportLabels
): Promise<{ success: boolean; filePath?: string; error?: string }> {
  if (messages.length === 0) {
    return { success: false, error: 'No messages to export' }
  }

  // 格式化内容
  let content: string
  let filename: string
  const timestamp = dayjs(createdAt).format('YYYYMMDD_HHmmss')
  const safeTitle = sanitizeFilename(title)

  if (format === 'markdown') {
    content = formatAsMarkdown(title, messages, createdAt, labels)
    filename = `${safeTitle}_${timestamp}.md`
  } else {
    content = formatAsPlainText(title, messages, createdAt, labels)
    filename = `${safeTitle}_${timestamp}.txt`
  }

  // 转换为 data URL 并保存
  const dataUrl = `data:text/plain;charset=utf-8,${encodeURIComponent(content)}`
  const { useCacheService } = await import('@/services/cache/service')
  const result = await useCacheService().saveToDownloads(filename, dataUrl)

  return result
}