feat(chat): ChatTimeline 导出按钮 + 修复 downloadBlob 文件名丢失(Content-Disposition)

Co-Authored-By: Claude <noreply@anthropic.com>

yunkes/src/views/ChatTimeline.vue

@@ -4,6 +4,7 @@ import { useRoute, useRouter } from 'vue-router'
 import { ElMessage } from 'element-plus'
 import { ArrowLeft } from '@element-plus/icons-vue'
 import { getMessages } from '@/api'
+import { downloadBlob } from '@/api/client'
 import type { Channel, Message } from '@/api/types'
 import MessageBubble from '@/components/MessageBubble.vue'
 import ChatSidebar from '@/components/ChatSidebar.vue'
@@ -228,6 +229,23 @@ function onSelectSession(s: {
   }
 }
 
+/** 导出当前会话/时段聊天记录为自包含 HTML（后端渲染气泡 + 附件内联）。 */
+async function exportCurrent(): Promise<void> {
+  if (!hasActive.value) return
+  try {
+    await downloadBlob('/export/chat-html', {
+      channel: channelTyped.value,
+      owner_account_id: props.ownerId,
+      talker_id: isGroup.value ? undefined : props.talkerId,
+      room_id: isGroup.value ? props.roomId : undefined,
+      start: winStart.value,
+      end: winEnd.value,
+    })
+  } catch (e) {
+    ElMessage.error(`导出失败：${(e as Error).message}`)
+  }
+}
+
 // All-fields drawer state for the message detail view.
 const drawerOpen = ref(false)
 const drawerMessage = ref<Message | null>(null)
@@ -297,6 +315,7 @@ onMounted(loadInitial)
               clearable
               style="width: 200px"
             />
+            <el-button v-if="hasActive" size="small" type="primary" plain @click="exportCurrent">导出</el-button>
           </div>
         </div>