feat(delivery): stream task updates with SSE

frontend/src/views/service/Catalog.vue

@@ -332,7 +332,7 @@
 </template>
 
 <script setup lang="ts">
-import { computed, onMounted, reactive, ref, watch } from 'vue'
+import { computed, onMounted, onUnmounted, reactive, ref, watch } from 'vue'
 import { ElMessage } from 'element-plus'
 import { Back, CircleCheck, Promotion, Refresh } from '@element-plus/icons-vue'
 import { useRoute, useRouter } from 'vue-router'
@@ -553,6 +553,7 @@ const taskRefreshing = ref(false)
 const taskRestoring = ref(false)
 const seenEventIds = ref(new Set<number>())
 const deliveryLog = ref('[ready] 等待创建交付任务...')
+let taskEventSource: EventSource | undefined
 
 const deliveryForm = reactive({
   instanceName: `mysql-${currentName.value}-billing-02`,
@@ -674,6 +675,10 @@ onMounted(async () => {
   await restoreActiveTask()
 })
 
+onUnmounted(() => {
+  stopTaskStream()
+})
+
 function handleCardClick(service: Service) {
   if (service.disabled) {
     if (service.key !== 'new') ElMessage.warning(`${service.name} 功能规划中，敬请期待`)
@@ -730,6 +735,7 @@ function startNewTask() {
 }
 
 function resetExecutionState() {
+  stopTaskStream()
   precheckPassed.value = false
   running.value = false
   deliveryDone.value = false
@@ -816,6 +822,7 @@ async function createTask() {
     deliveryLog.value += `\n[task] ${task.id} created by ${currentName.value}`
     applyDeliveryStatus(task.status, '')
     await refreshTaskSnapshot()
+    startTaskStream(task.id)
     ElMessage.success('交付任务已创建')
   } catch (error) {
     running.value = false
@@ -909,6 +916,8 @@ async function restoreActiveTask() {
     applyDeliveryStatus(detail.task.status, detail.task.error_message || '')
     if (isTerminalDeliveryStatus(detail.task.status)) {
       activeView.value = 'result'
+    } else {
+      startTaskStream(detail.task.id)
     }
   } catch (error) {
     ElMessage.error(error instanceof Error ? error.message : '恢复交付任务失败')
@@ -933,6 +942,35 @@ function hydrateTaskSnapshot(task: DeliveryTask) {
   }
 }
 
+function startTaskStream(taskId: string) {
+  stopTaskStream()
+  taskEventSource = deliveryApi.streamTask(taskId)
+  taskEventSource.addEventListener('snapshot', (event) => {
+    try {
+      const data = JSON.parse((event as MessageEvent).data) as { task?: DeliveryTask; events?: TaskEvent[] }
+      if (!data.task) return
+      hydrateTaskSnapshot(data.task)
+      applyTaskEvents(Array.isArray(data.events) ? data.events : [])
+      applyDeliveryStatus(data.task.status, data.task.error_message || '')
+      if (isTerminalDeliveryStatus(data.task.status)) {
+        activeView.value = 'result'
+        stopTaskStream()
+      }
+    } catch (error) {
+      appendLog(`[stream] ${error instanceof Error ? error.message : '解析任务状态失败'}`)
+    }
+  })
+  taskEventSource.onerror = () => {
+    if (running.value) appendLog('[stream] 实时连接中断，正在等待浏览器自动重连')
+  }
+}
+
+function stopTaskStream() {
+  if (!taskEventSource) return
+  taskEventSource.close()
+  taskEventSource = undefined
+}
+
 async function cancelDeployment() {
   if (!deploymentId.value) return
   canceling.value = true