Function createTopic

src/renderer/src/services/messagesService.ts:230–245

(
  pageId: string,
  name: string,
  startMessageId: string,
  endMessageId?: string
)

 * 创建新的 Topic
 */
export async function createTopic(
  pageId: string,
  name: string,
  startMessageId: string,
  endMessageId?: string
): Promise<Topic> {
  const topic: Topic = {
    id: uuidv4(),
    name,
    startMessageId,
    endMessageId,
    collapsed: false
  }
  await stores.message.addTopic(pageId, topic)
  return topic
}

/**
 * 更新 Topic