增加失败原因和优化进度条

bms-front/src/api/price/billing.js

@@ -109,6 +109,9 @@ export function cancelLocalRebill(taskId) {
   })
 }
 
+/** One in-flight poll per taskId — avoids stacked loops that flood XHR and freeze the page. */
+const localRebillPollControllers = new Map()
+
 /**
  * Poll local rebill task until terminal status.
  * @param {string} taskId
@@ -117,22 +120,48 @@ export function cancelLocalRebill(taskId) {
 export async function pollLocalRebillTask(taskId, onProgress) {
   const id = String(taskId || '')
   if (!id) throw new Error('missing local rebill taskId')
+
+  const prev = localRebillPollControllers.get(id)
+  if (prev) prev.aborted = true
+  const ctrl = { aborted: false }
+  localRebillPollControllers.set(id, ctrl)
+
   const started = Date.now()
   const maxMs = 30 * 60 * 1000
-  while (Date.now() - started < maxMs) {
-    const res = await getLocalRebillTask(id)
-    const task = res.data || {}
-    if (typeof onProgress === 'function') onProgress(task)
-    if (task.status === 'SUCCESS') return { task }
-    if (task.status === 'CANCELLED') return { task, cancelled: true }
-    if (task.status === 'FAIL') {
-      const err = new Error(task.error || task.message || 'local rebill failed')
-      err.task = task
-      throw err
+  let lastSig = ''
+  try {
+    while (Date.now() - started < maxMs) {
+      if (ctrl.aborted) {
+        const err = new Error('local rebill poll superseded')
+        err.superseded = true
+        throw err
+      }
+      // Hidden tab: slow down; no need to hammer Redis while user is away.
+      const hidden = typeof document !== 'undefined' && document.visibilityState === 'hidden'
+      const res = await getLocalRebillTask(id)
+      const task = res.data || {}
+      const st = String(task.status || '').toUpperCase()
+      const sig = [st, task.percent, task.success, task.fail, task.total].join('|')
+      if (typeof onProgress === 'function' && sig !== lastSig) {
+        lastSig = sig
+        onProgress(task)
+      }
+      if (st === 'SUCCESS') return { task }
+      if (st === 'CANCELLED') return { task, cancelled: true }
+      if (st === 'FAIL') {
+        const err = new Error(task.error || task.message || 'local rebill failed')
+        err.task = task
+        throw err
+      }
+      // 1s visible / 2.5s hidden — dense 400ms polls were freezing the list page.
+      await new Promise(resolve => setTimeout(resolve, hidden ? 2500 : 1000))
+    }
+    throw new Error('local rebill timeout')
+  } finally {
+    if (localRebillPollControllers.get(id) === ctrl) {
+      localRebillPollControllers.delete(id)
     }
-    await new Promise(resolve => setTimeout(resolve, 800))
   }
-  throw new Error('local rebill timeout')
 }
 
 /**