fix(web): 生成tears按钮任务状态化防重复提交(用户08-30补充) [nas]

痛点:点击生成→progress→返回详情页按钮仍可点,重复生成同类任务。
方案:每因子记task_id(localStorage factorTearsTask.v1),按钮三态——
无任务「生成tears报告」/进行中「分析进行中·查看进度→」(跳progress复用)/
已完成「✓查看tears报告→」(跳result复用);failed或tears缺失(修复前旧
失败任务getTearsData探测404)自动清态恢复可重新生成;任务404(已清理)同。
mounted/watch factor刷新态;build绿

frontend/src/views/factor/LeaderboardDetail.vue

@@ -1,7 +1,8 @@
 <script setup lang="ts">
 import { ref, onMounted, watch, nextTick, computed } from 'vue'
 import { useRoute, useRouter } from 'vue-router'
-import { getEvalDetail, submitFactor, type EvalDetail } from '@/api/factor'
+import { getEvalDetail, submitFactor, getTearsData, type EvalDetail } from '@/api/factor'
+import { getStatus } from '@/api/backtest'
 import { TEARS_SAMPLE_CODES } from '@/constants/factorSamples'
 import { useChart } from '@/composables/useChart'
 import { darkTitle, darkTooltip, darkGrid, darkAxis, BRAND } from '@/utils/echartsDark'
@@ -51,13 +52,92 @@ function toggleCompare() {
 
 // —— 一键生成 tears(方案A):排行榜数据没有分层序列,tears 要跑一次 alphalens 分析
 // (固定 30 只跨行业样本 × 近 2.5 年,分钟级),跑完结果页即新版 ECharts tears。
+// 任务状态化(用户 08-30 补充):每因子记住 task_id(localStorage),
+// 进行中→「查看进度」/已完成→「查看报告」复用任务,不再重复提交;
+// failed 或 tears 缺失(修复前旧任务)自动清态可重新生成。
 
 const TEARS_SAMPLE_SPAN = { start: '2024-01-01', end: '2026-06-30' }
+const TEARS_TASK_KEY = 'factorTearsTask.v1'
 
 const tearsSubmitting = ref(false)
+const tearsTaskId = ref('')
+const tearsBtn = ref<'none' | 'running' | 'view'>('none')
+
+function tearsTaskMap(): Record<string, string> {
+  try {
+    return JSON.parse(localStorage.getItem(TEARS_TASK_KEY) || '{}')
+  } catch {
+    return {}
+  }
+}
+
+function saveTearsTask(tid: string): void {
+  if (!detail.value) return
+  const map = tearsTaskMap()
+  map[detail.value.factor] = tid
+  try {
+    localStorage.setItem(TEARS_TASK_KEY, JSON.stringify(map))
+  } catch {
+    /* 隐私模式等:不可持久化时仅本页防重 */
+  }
+}
+
+function forgetTearsTask(): void {
+  if (!detail.value) return
+  const map = tearsTaskMap()
+  delete map[detail.value.factor]
+  try {
+    localStorage.setItem(TEARS_TASK_KEY, JSON.stringify(map))
+  } catch {
+    /* ignore */
+  }
+  tearsTaskId.value = ''
+}
+
+async function refreshTearsBtn(): Promise<void> {
+  const f = detail.value?.factor
+  if (!f) return
+  const tid = tearsTaskMap()[f]
+  if (!tid) {
+    tearsTaskId.value = ''
+    tearsBtn.value = 'none'
+    return
+  }
+  try {
+    const s = await getStatus(tid)
+    if (s.status === 'running' || s.status === 'pending') {
+      tearsTaskId.value = tid
+      tearsBtn.value = 'running'
+      return
+    }
+    if (s.status === 'done') {
+      tearsTaskId.value = tid
+      tearsBtn.value = 'view'
+      // done 但 tears 缺失(修复前的失败任务)→ 恢复可重新生成
+      try {
+        await getTearsData(tid, f)
+      } catch {
+        forgetTearsTask()
+        tearsBtn.value = 'none'
+      }
+      return
+    }
+    forgetTearsTask() // failed → 可重跑
+  } catch {
+    forgetTearsTask() // 任务不存在(已清理)→ 可重跑
+  }
+}
 
 async function generateTears() {
   if (!detail.value || tearsSubmitting.value) return
+  if (tearsBtn.value === 'running') {
+    router.push(`/factor/progress/${tearsTaskId.value}`)
+    return
+  }
+  if (tearsBtn.value === 'view') {
+    router.push(`/factor/result/${tearsTaskId.value}`)
+    return
+  }
   tearsSubmitting.value = true
   try {
     const tid = await submitFactor({
@@ -66,6 +146,7 @@ async function generateTears() {
       start: TEARS_SAMPLE_SPAN.start,
       end: TEARS_SAMPLE_SPAN.end,
     })
+    saveTearsTask(tid)
     ElMessage.success('tears 分析已发起(30 只样本 · 约 1~3 分钟)')
     router.push(`/factor/progress/${tid}`)
   } catch {
@@ -190,7 +271,15 @@ function toggleExpr() {
   expandedExpr.value = !expandedExpr.value
 }
 
-onMounted(load)
+onMounted(async () => {
+  await load()
+  void refreshTearsBtn()
+})
+
+watch(
+  () => detail.value?.factor,
+  () => { void refreshTearsBtn() },
+)
 
 watch(
   () => [detail.value, period.value],
@@ -343,7 +432,10 @@ function pct(val: number | null | undefined): string {
       <!-- Actions -->
       <div class="actions">
         <button class="btn primary" :disabled="tearsSubmitting" @click="generateTears">
-          {{ tearsSubmitting ? '发起中…' : '生成 tears 报告' }}
+          {{ tearsSubmitting ? '发起中…'
+             : tearsBtn === 'running' ? '分析进行中 · 查看进度 →'
+             : tearsBtn === 'view' ? '✓ 查看 tears 报告 →'
+             : '生成 tears 报告' }}
         </button>
         <button class="btn" @click="goToNewFactor">自选样本分析</button>
         <button class="btn" :class="{ chosen: inCompare }" @click="toggleCompare">