后台继续生成符合“取消需二次确认”的现有逻辑，但弹窗状态没有跟随任务完成状态更新，属于交互竞态问题 已修复

bms-front/src/views/ar/bill/index.vue

@@ -3,7 +3,7 @@
     <div v-if="generateStatusVisible" class="generate-status-float">
       <el-tooltip :content="generateStatusTooltip" placement="bottom">
         <el-button class="generate-status-button" type="primary" plain size="small"
-          :disabled="activeGenerateTask?.status === 'CANCEL_REQUESTED'" @click="cancelActiveGenerateTask">
+          :disabled="!canCancelActiveGenerateTask" @click="cancelActiveGenerateTask">
           <span class="generate-progress-ring" :style="{ '--generate-progress': `${generateProgressDegree}deg` }" aria-hidden="true">
             <span class="generate-progress-value">{{ generateProgressText }}</span>
           </span>
@@ -50,6 +50,16 @@
 
     <bill-detail v-model="detailOpen" :detail="detail" :loading="detailLoading" @download="downloadExport" @export="exportBill(detail)" />
     <generate-bill-dialog v-model="generateOpen" @success="handleGenerateSuccess" />
+    <el-dialog v-model="cancelConfirmVisible" title="取消账单生成" width="420px" append-to-body
+      :close-on-click-modal="false" :close-on-press-escape="!cancelConfirmLoading"
+      :show-close="!cancelConfirmLoading" @closed="handleCancelConfirmClosed">
+      <p class="cancel-generate-message">账单正在后台生成，确定取消当前任务吗？</p>
+      <template #footer>
+        <el-button :disabled="cancelConfirmLoading" @click="cancelConfirmVisible = false">暂不取消</el-button>
+        <el-button type="warning" :loading="cancelConfirmLoading" :disabled="cancelConfirmDisabled"
+          @click="confirmCancelActiveGenerateTask">{{ cancelConfirmLoading ? '取消中' : '确定取消' }}</el-button>
+      </template>
+    </el-dialog>
   </div>
 </template>
 
@@ -83,13 +93,27 @@ const generateTasks = reactive(new Map())
 const activeGenerateTasks = computed(() => Array.from(generateTasks.values()))
 const activeGenerateTask = computed(() => activeGenerateTasks.value[0])
 const generateStatusVisible = computed(() => activeGenerateTasks.value.length > 0)
+const cancelConfirmVisible = ref(false)
+const cancelConfirmLoading = ref(false)
+const cancelConfirmTaskId = ref()
+const cancelConfirmTask = computed(() => cancelConfirmTaskId.value ? generateTasks.get(cancelConfirmTaskId.value) : null)
+const canCancelActiveGenerateTask = computed(() => ['WAITING', 'RUNNING'].includes(activeGenerateTask.value?.status))
+const cancelConfirmDisabled = computed(() => {
+  return cancelConfirmLoading.value || !['WAITING', 'RUNNING'].includes(cancelConfirmTask.value?.status)
+})
 const generateStatusTitle = computed(() => {
   const status = activeGenerateTask.value?.status
   if (status === 'WAITING') return '账单排队中'
+  if (status === 'SUCCESS') return '账单生成完成'
+  if (status === 'FAILED') return '账单生成失败'
+  if (status === 'CANCELED') return '账单已取消'
   if (status === 'CANCEL_REQUESTED') return '账单取消中'
   return '账单生成中'
 })
 const generateStatusTooltip = computed(() => {
+  if (['SUCCESS', 'FAILED', 'CANCELED'].includes(activeGenerateTask.value?.status)) {
+    return '任务状态已更新'
+  }
   return activeGenerateTask.value?.status === 'CANCEL_REQUESTED'
     ? '正在清理已生成的账单数据，请稍候'
     : '点击取消当前账单生成任务'
@@ -107,6 +131,8 @@ const generateProgressDegree = computed(() => {
 const generateStatusSummary = computed(() => {
   const task = activeGenerateTask.value
   if (!task) return '任务提交中'
+  if (task.status === 'FAILED') return '任务执行失败'
+  if (task.status === 'CANCELED') return '任务已取消'
   if (task.status === 'CANCEL_REQUESTED') return '正在清理数据'
   if (task.status === 'WAITING') return '等待后台处理'
   if (Number(task.totalCount) > 0) return `${Number(task.processedCount || 0)} / ${Number(task.totalCount)} 条`
@@ -164,6 +190,7 @@ function startGeneratePolling(taskId) {
 
 function finishGenerateTask(taskId, task) {
   stopGeneratePolling(taskId)
+  closeCancelConfirm(taskId)
   if (generateFinishTimers.has(taskId)) return
   // 即使后台很快返回 SUCCESS，也延迟清理浮层，保证用户能看到结果反馈。
   const visibleSince = generateVisibleSince.get(taskId) || Date.now()
@@ -200,12 +227,50 @@ function stopGeneratePolling(taskId) {
 
 function cancelActiveGenerateTask() {
   const task = activeGenerateTask.value
-  if (!task?.taskId) return
-  proxy.$modal.confirm('账单正在后台生成，确定取消当前任务吗？').then(() => cancelArBillGenerateTask(task.taskId)).then(res => {
+  if (!task?.taskId || !canCancelActiveGenerateTask.value) return
+  cancelConfirmTaskId.value = task.taskId
+  cancelConfirmLoading.value = false
+  cancelConfirmVisible.value = true
+}
+
+async function confirmCancelActiveGenerateTask() {
+  const taskId = cancelConfirmTaskId.value
+  const task = taskId ? generateTasks.get(taskId) : null
+  if (!taskId || !['WAITING', 'RUNNING'].includes(task?.status)) {
+    cancelConfirmVisible.value = false
+    return
+  }
+  cancelConfirmLoading.value = true
+  try {
+    const res = await cancelArBillGenerateTask(taskId)
     const updated = res.data
-    if (updated) generateTasks.set(updated.taskId, updated)
-    proxy.$modal.msgSuccess('已提交取消请求')
-  }).catch(() => {})
+    let cancellationSubmitted = true
+    if (updated?.taskId) {
+      generateTasks.set(updated.taskId, updated)
+      if (['SUCCESS', 'FAILED', 'CANCELED'].includes(updated.status)) {
+        finishGenerateTask(updated.taskId, updated)
+        cancellationSubmitted = false
+      }
+    }
+    cancelConfirmVisible.value = false
+    if (cancellationSubmitted) proxy.$modal.msgSuccess('已提交取消请求')
+  } catch (error) {
+    // 请求失败时保留弹窗，允许用户重新确认；全局请求拦截器负责展示错误信息。
+  } finally {
+    cancelConfirmLoading.value = false
+  }
+}
+
+function closeCancelConfirm(taskId) {
+  if (cancelConfirmTaskId.value !== taskId) return
+  cancelConfirmVisible.value = false
+  cancelConfirmLoading.value = false
+  cancelConfirmTaskId.value = undefined
+}
+
+function handleCancelConfirmClosed() {
+  cancelConfirmLoading.value = false
+  cancelConfirmTaskId.value = undefined
 }
 
 function loadActiveGenerateTasks() {
@@ -390,6 +455,11 @@ function statusType(value) { return AR_BILL_STATUS_TYPES[value] || 'info' }
 .ar-bill-page .amount { color: #f56c6c; font-weight: 600; }
 .ar-bill-page .written { color: #67c23a; }
 .ar-bill-page .unwritten { color: #e6a23c; }
+.ar-bill-page .cancel-generate-message {
+  margin: 0;
+  color: var(--el-text-color-primary);
+  line-height: 1.7;
+}
 
 .ar-bill-page .generate-status-float {
   position: fixed;