Function toggleTopicCollapse

src/renderer/src/services/messagesService.ts:268–276

(pageId: string, topicId: string)

 * 切换 Topic 折叠状态
 */
export async function toggleTopicCollapse(pageId: string, topicId: string): Promise<void> {
  const topics = stores.message.getTopics(pageId)
  const topic = topics.find((t) => t.id === topicId)
  if (topic) {
    await stores.message.updateTopic(pageId, topicId, {
      collapsed: !topic.collapsed
    })
  }
}

/**
 * 设置 Topic 折叠状态