From 759f0b15d8ef24afab79a1c6d84ddbcbb69b4dd5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=BB=84=E8=87=AA=E8=BE=BE?= <980324341@qq.com>
Date: Tue, 1 Sep 2026 12:53:12 +0800
Subject: [PATCH] =?UTF-8?q?task-101:=20=E4=B8=8A=E4=BC=A0/=E8=A7=A3?=
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新增 shared/dispatch-guard.ts（纯 TS 校验，可单测）与 dispatch-guard-ui.ts
（ElMessageBox 弹窗层），在数据流的三个位置设闸：

- 选文件：空选择、非 xlsx/xls/csv、空路径直接拦；重复文件弹确认
- 解析结果：taskId 非法、totalRows 为 0、整批行被丢弃、需要分组却无分组直接拦；
  部分行被丢弃弹确认后才允许推送
- 入队前：结构不符、必填字段缺失、items/groups/country_codes 为空数组、
  行数页数为 0、JSON 不安全值（NaN/Infinity/BigInt/循环引用/数组洞）

覆盖 11 个推 Python 队列的 Tab 与 dedupe/split/convert 三个纯 Java Tab。
闸位按 Tab 挑选以免留下孤儿后端状态：collect-data 校验前置到
activateCollectDataTask 之前（任务保持 PENDING 无需回滚）、product-risk 的国家
检查提到建任务之前；已建任务后才拦下的复用各 Tab 原有失败补偿路径。

两处边界：对象属性 undefined 放行（taskNo 这类可选字段是惯用写法），只拦数组
元素 undefined 与数组洞；price-track 的 asin_rows_by_country 仅在 mode=asin
时要求非空，status 模式下 loadAsinRowsForAppClient 本就返回 {}。

顺带修复 similar-asin / appearance-patent 的 selectFiles 缺少 try/catch，
上传失败会残留上一批文件与解析结果。

测试：tests/dispatch-guard.test.ts 新增 37 个 test_task_101_* 用例。
---
 .../components/BrandAppearancePatentTab.vue   |  52 +-
 .../brand/components/BrandCollectDataTab.vue  |  37 +-
 .../brand/components/BrandConvertTab.vue      |  36 +
 .../pages/brand/components/BrandDedupeTab.vue |  21 +
 .../brand/components/BrandDeleteBrandTab.vue  |  39 ++
 .../brand/components/BrandPatrolDeleteTab.vue |  27 +
 .../brand/components/BrandPriceTrackTab.vue   |  28 +
 .../brand/components/BrandProductRiskTab.vue  |  30 +
 .../brand/components/BrandPublishTab.vue      |  29 +
 .../brand/components/BrandQueryAsinTab.vue    |  28 +
 .../components/BrandShopDataCrawlTab.vue      |  11 +
 .../brand/components/BrandSimilarAsinTab.vue  |  48 +-
 .../pages/brand/components/BrandSplitTab.vue  |  20 +
 .../brand/components/BrandWithdrawTab.vue     |  23 +
 frontend-vue/src/shared/dispatch-guard-ui.ts  |  67 ++
 frontend-vue/src/shared/dispatch-guard.ts     | 661 ++++++++++++++++++
 frontend-vue/src/styles/main.css              |  18 +
 frontend-vue/tests/dispatch-guard.test.ts     | 442 ++++++++++++
 18 files changed, 1603 insertions(+), 14 deletions(-)
 create mode 100644 frontend-vue/src/shared/dispatch-guard-ui.ts
 create mode 100644 frontend-vue/src/shared/dispatch-guard.ts
 create mode 100644 frontend-vue/tests/dispatch-guard.test.ts

diff --git a/frontend-vue/src/pages/brand/components/BrandAppearancePatentTab.vue b/frontend-vue/src/pages/brand/components/BrandAppearancePatentTab.vue
index e6088716..35b9e335 100644
--- a/frontend-vue/src/pages/brand/components/BrandAppearancePatentTab.vue
+++ b/frontend-vue/src/pages/brand/components/BrandAppearancePatentTab.vue
@@ -164,6 +164,13 @@ import { getTaskPollIntervalMs } from '@/shared/task-progress-config'
 import { getStoredApiSecret } from '@/shared/utils/api-secret-store'
 import { createCategorizedTimers } from '@/shared/utils/categorized-timers'
 import { saveUrlWithProgress } from '@/shared/utils/download-progress'
+import {
+  EXCEL_EXTENSIONS,
+  checkParseResult,
+  checkQueuePayload,
+  checkSelectedFiles,
+} from '@/shared/dispatch-guard'
+import { passGuard } from '@/shared/dispatch-guard-ui'
 
 const selectedFileNames = ref<string[]>([])
 const uploadedFiles = ref<UploadFileVo[]>([])
@@ -363,12 +370,23 @@ async function selectFiles() {
   }
   const paths = await api.select_brand_xlsx_files()
   if (!paths?.length) return
-  const files = await uploadAppearancePathsToJava(paths)
-  uploadedFiles.value = files
-  selectedFileNames.value = files.map((f) => f.relativePath || f.originalFilename || f.fileKey)
-  parseResult.value = null
-  queuedTaskSummary.value = null
-  queuePayloadText.value = ''
+  if (!(await passGuard(checkSelectedFiles(paths, { allowedExtensions: EXCEL_EXTENSIONS })))) return
+  try {
+    const files = await uploadAppearancePathsToJava(paths)
+    uploadedFiles.value = files
+    selectedFileNames.value = files.map((f) => f.relativePath || f.originalFilename || f.fileKey)
+    parseResult.value = null
+    queuedTaskSummary.value = null
+    queuePayloadText.value = ''
+  } catch (error) {
+    // 上传失败时清空选择，避免残留上一批文件让用户误以为新文件已就绪
+    uploadedFiles.value = []
+    selectedFileNames.value = []
+    parseResult.value = null
+    queuedTaskSummary.value = null
+    queuePayloadText.value = ''
+    ElMessage.error(error instanceof Error ? error.message : '文件上传失败')
+  }
 }
 
 async function selectFolder() {
@@ -385,6 +403,7 @@ async function selectFolder() {
       ElMessage.warning(result.error || '该文件夹下没有可用的 xlsx 文件')
       return
     }
+    if (!(await passGuard(checkSelectedFiles(result.items, { allowedExtensions: EXCEL_EXTENSIONS })))) return
     const files = await uploadAppearancePathsToJava(result.items)
     uploadedFiles.value = files
     selectedFileNames.value = result.items.map((item) => item.relativePath || item.absolutePath)
@@ -393,6 +412,9 @@ async function selectFolder() {
     queuePayloadText.value = ''
     ElMessage.success(`已选择文件夹内 ${result.items.length} 个 Excel 文件`)
   } catch (error) {
+    uploadedFiles.value = []
+    selectedFileNames.value = []
+    parseResult.value = null
     ElMessage.error(error instanceof Error ? error.message : '选择失败')
   }
 }
@@ -414,6 +436,17 @@ async function parseFiles() {
       relativePath: f.relativePath,
     }))
     const res = await parseAppearancePatent(files, effectiveAiPrompt(), effectiveLlmApiKey(), effectivePatentToken())
+    // 本模块按主 ID 分组执行，没有分组就没有可跑的批次，一并拦下
+    const guard = checkParseResult(res, {
+      requireGroups: true,
+      requiredColumnsHint: 'id / ASIN / 国家',
+    })
+    if (!(await passGuard(guard))) {
+      parseResult.value = null
+      queuedTaskSummary.value = null
+      queuePayloadText.value = ''
+      return
+    }
     parseResult.value = res
     queuedTaskSummary.value = null
     queuePayloadText.value = ''
@@ -479,6 +512,13 @@ async function pushToPythonQueue() {
       },
     }
     queuePayloadText.value = `任务 ${taskId} 已准备推送，共 ${groups.length} 组`
+    // 后端返回的 groups 为空时推送出去，Python 端没有可执行批次会一直停在执行中
+    const guard = checkQueuePayload(payload, {
+      expectedType: 'appearance-patent-run',
+      requiredDataKeys: ['taskId', 'api_key'],
+      nonEmptyArrayKeys: ['groups'],
+    })
+    if (!(await passGuard(guard))) return
     await activateAppearancePatentTask(taskId)
     const result = await api.enqueue_json(payload)
     if (!result?.success) {
diff --git a/frontend-vue/src/pages/brand/components/BrandCollectDataTab.vue b/frontend-vue/src/pages/brand/components/BrandCollectDataTab.vue
index d084010c..3e24c2cc 100644
--- a/frontend-vue/src/pages/brand/components/BrandCollectDataTab.vue
+++ b/frontend-vue/src/pages/brand/components/BrandCollectDataTab.vue
@@ -219,6 +219,13 @@ import { getPywebviewApi } from '@/shared/bridges/pywebview'
 import { useTaskProgressLoop } from '@/shared/composables/useTaskProgressLoop'
 import { createCategorizedTimers } from '@/shared/utils/categorized-timers'
 import { saveUrlWithProgress } from '@/shared/utils/download-progress'
+import {
+  EXCEL_EXTENSIONS,
+  checkParseResult,
+  checkQueuePayload,
+  checkSelectedFiles,
+} from '@/shared/dispatch-guard'
+import { passGuard } from '@/shared/dispatch-guard-ui'
 import {
   parseCollectData,
   activateCollectDataTask,
@@ -396,12 +403,18 @@ async function selectFiles() {
   try {
     const paths = await api.select_brand_xlsx_files()
     if (!paths?.length) return
+    if (!(await passGuard(checkSelectedFiles(paths, { allowedExtensions: EXCEL_EXTENSIONS })))) return
     const files = await uploadPathsToJava(paths)
     uploadedFiles.value = files
     selectedFileNames.value = files.map((f) => f.relativePath || f.originalFilename || f.fileKey)
     lastTaskId.value = null
     lastParseVo.value = null
   } catch (error) {
+    // 上传失败时清空选择，避免残留上一批文件让用户误以为新文件已就绪
+    uploadedFiles.value = []
+    selectedFileNames.value = []
+    lastTaskId.value = null
+    lastParseVo.value = null
     ElMessage.error(error instanceof Error ? error.message : '文件选择失败')
   }
 }
@@ -420,6 +433,7 @@ async function selectFolder() {
       ElMessage.warning(result.error || '该文件夹下没有可用的 xlsx 文件')
       return
     }
+    if (!(await passGuard(checkSelectedFiles(result.items, { allowedExtensions: EXCEL_EXTENSIONS })))) return
     const files = await uploadPathsToJava(result.items)
     uploadedFiles.value = files
     selectedFileNames.value = result.items.map((item) => item.relativePath || item.absolutePath)
@@ -427,6 +441,10 @@ async function selectFolder() {
     lastParseVo.value = null
     ElMessage.success(`已选择文件夹内 ${result.items.length} 个 Excel 文件`)
   } catch (error) {
+    uploadedFiles.value = []
+    selectedFileNames.value = []
+    lastTaskId.value = null
+    lastParseVo.value = null
     ElMessage.error(error instanceof Error ? error.message : '选择失败')
   }
 }
@@ -475,6 +493,14 @@ async function submitCollect() {
     })
     lastParseVo.value = vo
     lastTaskId.value = vo.taskId ?? null
+    // 0 行落库的任务推给 Python 后拉不到任何明细，会一直停在执行中
+    const guard = checkParseResult(vo, { requiredColumnsHint: 'ASIN / 国家' })
+    if (!(await passGuard(guard))) {
+      lastParseVo.value = null
+      lastTaskId.value = null
+      await Promise.all([loadDashboard(), loadHistory()])
+      return
+    }
     ElMessage.success(`提交成功：任务 ${vo.taskNo || vo.taskId}，落库 ${vo.acceptedRows ?? 0} 行`)
     await Promise.all([loadDashboard(), loadHistory()])
   } catch (error) {
@@ -497,8 +523,6 @@ async function pushToPythonQueue() {
   pushing.value = true
   let activated = false
   try {
-    await activateCollectDataTask(lastTaskId.value)
-    activated = true
     const payload = {
       type: 'collect-data-run',
       ts: Date.now(),
@@ -511,6 +535,15 @@ async function pushToPythonQueue() {
         filters: buildFiltersPayload(),
       },
     }
+    // 先校验再激活：拦下来时任务还是 PENDING，不需要回滚成 FAILED
+    const guard = checkQueuePayload(payload, {
+      expectedType: 'collect-data-run',
+      requiredDataKeys: ['taskId', 'pageSize'],
+      nonEmptyObjectKeys: ['filters'],
+    })
+    if (!(await passGuard(guard))) return
+    await activateCollectDataTask(lastTaskId.value)
+    activated = true
     const result = await api.enqueue_json(payload)
     if (!result?.success) {
       throw new Error(result?.error || '入队失败')
diff --git a/frontend-vue/src/pages/brand/components/BrandConvertTab.vue b/frontend-vue/src/pages/brand/components/BrandConvertTab.vue
index 42899600..2a7a879b 100644
--- a/frontend-vue/src/pages/brand/components/BrandConvertTab.vue
+++ b/frontend-vue/src/pages/brand/components/BrandConvertTab.vue
@@ -190,6 +190,8 @@ import {
 } from '@/shared/api/java-modules'
 import { getPywebviewApi, type UploadedJavaFile } from '@/shared/bridges/pywebview'
 import { saveUrlWithProgress } from '@/shared/utils/download-progress'
+import { EXCEL_EXTENSIONS, checkSelectedFiles, guardBlocked } from '@/shared/dispatch-guard'
+import { passGuard } from '@/shared/dispatch-guard-ui'
 
 const convertSelectedPaths = ref<string[]>([])
 const convertArchiveName = ref('')
@@ -272,8 +274,11 @@ async function selectConvertFiles() {
   try {
     const paths = await api.select_brand_xlsx_files()
     if (!paths?.length) return
+    if (!(await passGuard(checkSelectedFiles(paths, { allowedExtensions: EXCEL_EXTENSIONS })))) return
     await handleSelectedPaths(paths, `已选择 ${paths.length} 个待转换文件`)
   } catch (error) {
+    convertSelectedPaths.value = []
+    convertUploadedFiles.value = []
     ElMessage.error(error instanceof Error ? error.message : '选择失败')
   }
 }
@@ -292,6 +297,7 @@ async function selectConvertFolder() {
 
     const result = await expandBrandFolderRecursive(folder)
     if (result.success && result.items?.length) {
+      if (!(await passGuard(checkSelectedFiles(result.items, { allowedExtensions: EXCEL_EXTENSIONS })))) return
       convertSelectedPaths.value = result.items.map((item) => item.relativePath)
       convertUploadedFiles.value = await uploadPathsToJava(result.items)
       ElMessage.success(`已选择文件夹内 ${result.items.length} 个 xlsx 文件`)
@@ -300,6 +306,8 @@ async function selectConvertFolder() {
 
     ElMessage.warning(result.error || '该文件夹下没有 xlsx 文件')
   } catch (error) {
+    convertSelectedPaths.value = []
+    convertUploadedFiles.value = []
     ElMessage.error(error instanceof Error ? error.message : '选择失败')
   }
 }
@@ -317,9 +325,25 @@ async function handleTemplateFileChange(event: Event) {
     return
   }
 
+  // 浏览器侧直接读内容的唯一入口：扩展名与内容都在这里拦，空模板传上去后
+  // 转换阶段每个文件都会失败，不如在上传时就说清楚。
+  if (!(await passGuard(checkSelectedFiles([file.name], { allowedExtensions: ['.txt'] })))) {
+    return
+  }
+
   try {
     templateUploading.value = true
     const templateContent = await file.text()
+    if (!templateContent.trim()) {
+      await passGuard(
+        guardBlocked(
+          '模板内容为空',
+          `${file.name} 里没有任何内容。\n空模板无法用于格式转换，请填好列映射后重新上传。`,
+          'convert.empty-template',
+        ),
+      )
+      return
+    }
     const templateName = file.name.replace(/\.[^.]+$/, '') || file.name
 
     const template = await importConvertTemplate({
@@ -436,6 +460,18 @@ async function submitConvertRun() {
     convertSummary.value = result
     convertResultItems.value = result.items || []
     await loadConvertHistory()
+    if (result.total > 0 && result.successCount === 0) {
+      await passGuard(
+        guardBlocked(
+          '格式转换未成功',
+          `本次提交的 ${result.total} 个文件全部转换失败。\n` +
+            '常见原因是源文件表头与所选模板不匹配，或文件内没有数据行。\n' +
+            '请在右侧结果列表查看每个文件的失败原因，或换一个模板后重试。',
+          'convert.all-failed',
+        ),
+      )
+      return
+    }
     ElMessage.success('格式转换完成')
   } catch (error) {
     ElMessage.error(error instanceof Error ? error.message : '格式转换失败')
diff --git a/frontend-vue/src/pages/brand/components/BrandDedupeTab.vue b/frontend-vue/src/pages/brand/components/BrandDedupeTab.vue
index 2bf044a8..b36faff1 100644
--- a/frontend-vue/src/pages/brand/components/BrandDedupeTab.vue
+++ b/frontend-vue/src/pages/brand/components/BrandDedupeTab.vue
@@ -151,6 +151,8 @@ import { expandBrandFolderRecursive, type BrandExpandFolderItem } from '@/shared
 import { deleteDedupeHistory, getDedupeHistory, getDedupeResultDownloadUrl, getExcelInfo, runDedupe, type DedupeResultItem, type DedupeRunVo } from '@/shared/api/java-modules'
 import { getPywebviewApi, type UploadedJavaFile } from '@/shared/bridges/pywebview'
 import { saveUrlWithProgress } from '@/shared/utils/download-progress'
+import { EXCEL_EXTENSIONS, checkSelectedFiles, guardBlocked } from '@/shared/dispatch-guard'
+import { passGuard } from '@/shared/dispatch-guard-ui'
 
 const cleanAvailableColumns = ref<string[]>([])
 const cleanSelectedColumns = ref<string[]>([])
@@ -231,8 +233,11 @@ async function selectCleanFiles() {
   try {
     const paths = await api.select_brand_xlsx_files()
     if (!paths?.length) return
+    if (!(await passGuard(checkSelectedFiles(paths, { allowedExtensions: EXCEL_EXTENSIONS })))) return
     await handleSelectedPaths(paths, `已选择 ${paths.length} 个待清洗文件`)
   } catch (error) {
+    cleanSelectedPaths.value = []
+    cleanUploadedFiles.value = []
     ElMessage.error(error instanceof Error ? error.message : '选择失败')
   }
 }
@@ -251,6 +256,7 @@ async function selectCleanFolder() {
 
     const result = await expandBrandFolderRecursive(folder)
     if (result.success && result.items?.length) {
+      if (!(await passGuard(checkSelectedFiles(result.items, { allowedExtensions: EXCEL_EXTENSIONS })))) return
       cleanSelectedPaths.value = result.items.map((item) => item.relativePath)
       cleanUploadedFiles.value = await uploadPathsToJava(result.items)
       if (cleanUploadedFiles.value.length > 0) {
@@ -262,6 +268,8 @@ async function selectCleanFolder() {
 
     ElMessage.warning(result.error || '该文件夹下没有 xlsx 文件')
   } catch (error) {
+    cleanSelectedPaths.value = []
+    cleanUploadedFiles.value = []
     ElMessage.error(error instanceof Error ? error.message : '选择失败')
   }
 }
@@ -296,6 +304,19 @@ async function submitCleanRun() {
     cleanSummary.value = result
     cleanResultItems.value = result.items || []
     await loadCleanHistory()
+    // 全部文件都失败时不该报「完成」，让用户看清是哪一批没处理成功
+    if (result.total > 0 && result.successCount === 0) {
+      await passGuard(
+        guardBlocked(
+          '去重未成功',
+          `本次提交的 ${result.total} 个文件全部处理失败。\n` +
+            '常见原因是表头列名与所选保留列对不上，或文件内没有数据行。\n' +
+            '请在右侧结果列表查看每个文件的失败原因后重试。',
+          'dedupe.all-failed',
+        ),
+      )
+      return
+    }
     ElMessage.success('数据去重完成')
   } catch (error) {
     ElMessage.error(error instanceof Error ? error.message : '去重失败')
diff --git a/frontend-vue/src/pages/brand/components/BrandDeleteBrandTab.vue b/frontend-vue/src/pages/brand/components/BrandDeleteBrandTab.vue
index 1d54a9c7..8ecdc1b8 100644
--- a/frontend-vue/src/pages/brand/components/BrandDeleteBrandTab.vue
+++ b/frontend-vue/src/pages/brand/components/BrandDeleteBrandTab.vue
@@ -235,6 +235,13 @@ import { getPywebviewApi, type UploadedJavaFile } from '@/shared/bridges/pywebvi
 import { getTaskPollIntervalMs } from '@/shared/task-progress-config'
 import { createCategorizedTimers } from '@/shared/utils/categorized-timers'
 import { saveUrlWithProgress } from '@/shared/utils/download-progress'
+import {
+  EXCEL_EXTENSIONS,
+  checkQueuePayload,
+  checkSelectedFiles,
+  guardBlocked,
+} from '@/shared/dispatch-guard'
+import { passGuard } from '@/shared/dispatch-guard-ui'
 import { useZiniaoVersion } from '@/shared/utils/ziniao-version'
 
 interface SessionDeleteBrandItem extends DeleteBrandResultItem {
@@ -1054,10 +1061,14 @@ async function selectFiles() {
   try {
     const paths = await api.select_brand_xlsx_files()
     if (!paths?.length) return
+    if (!(await passGuard(checkSelectedFiles(paths, { allowedExtensions: EXCEL_EXTENSIONS })))) return
     selectedPaths.value = paths
     uploadedFiles.value = await uploadPathsToJava(paths)
     ElMessage.success(`已选择 ${paths.length} 个删除品牌文件`)
   } catch (error) {
+    // 上传失败时清空选择，避免残留上一批文件让用户误以为新文件已就绪
+    selectedPaths.value = []
+    uploadedFiles.value = []
     ElMessage.error(error instanceof Error ? error.message : '选择失败')
   }
 }
@@ -1077,10 +1088,13 @@ async function selectFolder() {
       ElMessage.warning(result.error || '该文件夹下没有 xlsx 文件')
       return
     }
+    if (!(await passGuard(checkSelectedFiles(result.items, { allowedExtensions: EXCEL_EXTENSIONS })))) return
     selectedPaths.value = result.items.map((item) => item.relativePath || item.absolutePath)
     uploadedFiles.value = await uploadPathsToJava(result.items)
     ElMessage.success(`已选择文件夹内 ${result.items.length} 个 xlsx 文件`)
   } catch (error) {
+    selectedPaths.value = []
+    uploadedFiles.value = []
     ElMessage.error(error instanceof Error ? error.message : '选择失败')
   }
 }
@@ -1100,6 +1114,21 @@ async function submitRun() {
       })),
     })
     const normalizedItems = normalizeDeleteBrandItems(result.items || [])
+    // 一条都没解析出来说明文件根本没读懂，直接拦下，不写入会话与历史
+    if (!normalizedItems.length) {
+      await passGuard(
+        guardBlocked(
+          '解析结果无法执行',
+          '这批文件里没有解析出任何删除品牌记录。\n' +
+            '请确认文件名能对应到店铺名、表内有数据行且表头与模板一致，修正后重新上传。',
+          'delete-brand.empty-result',
+        ),
+      )
+      queuePushResult.value = '解析完成，但没有解析出任何记录'
+      queuePayloadText.value = ''
+      await loadHistory()
+      return
+    }
     const hasRunnableItems = normalizedItems.some((item) => isUsableMatchedItem(item))
     const hasStaleMatchedItems = normalizedItems.some((item) => item.matchStatus === 'INDEX_STALE' && item.matched)
     const hasBlockedItems = normalizedItems.some((item) => !isUsableMatchedItem(item))
@@ -1322,6 +1351,16 @@ async function runItem(item: DeleteBrandResultItem, options?: { auto?: boolean }
   }
 
   queuePayloadText.value = JSON.stringify(payload, null, 2)
+  const guard = checkQueuePayload(payload, {
+    expectedType: 'delete-brand-run',
+    requiredDataKeys: ['taskId'],
+    nonEmptyArrayKeys: ['items'],
+  })
+  if (!(await passGuard(guard))) {
+    queuePushResult.value = `文件 ${item.sourceFilename || taskId} 数据校验未通过，已阻止推送`
+    saveSessionTask(taskId, sessionTask.items, queuePushResult.value, queuePayloadText.value)
+    return { success: false, retryable: false }
+  }
   const pushResult = await api.enqueue_json(payload)
   let qpr = ''
   if (pushResult?.success) {
diff --git a/frontend-vue/src/pages/brand/components/BrandPatrolDeleteTab.vue b/frontend-vue/src/pages/brand/components/BrandPatrolDeleteTab.vue
index ceb504e4..e0bda516 100644
--- a/frontend-vue/src/pages/brand/components/BrandPatrolDeleteTab.vue
+++ b/frontend-vue/src/pages/brand/components/BrandPatrolDeleteTab.vue
@@ -395,6 +395,8 @@ import { getPywebviewApi } from "@/shared/bridges/pywebview";
 import { getTaskPollIntervalMs } from "@/shared/task-progress-config";
 import { createCategorizedTimers } from "@/shared/utils/categorized-timers";
 import { saveUrlWithProgress } from "@/shared/utils/download-progress";
+import { checkQueuePayload } from "@/shared/dispatch-guard";
+import { passGuard } from "@/shared/dispatch-guard-ui";
 import ZiniaoVersionSetting from "@/shared/components/ZiniaoVersionSetting.vue";
 import { useZiniaoVersion } from "@/shared/utils/ziniao-version";
 
@@ -1119,6 +1121,31 @@ async function processQueue() {
       const payload = buildQueuePayload(created.taskId, createdItems);
       queuePayloadText.value = JSON.stringify(payload, null, 2);
 
+      // 删除条件为空时 Python 端没有可执行的判定规则，任务会一直停在执行中
+      const guard = checkQueuePayload(payload, {
+        expectedType: "patrol-delete-run",
+        requiredDataKeys: ["taskId"],
+        nonEmptyArrayKeys: ["items", "delete_conditions"],
+      });
+      if (!(await passGuard(guard))) {
+        await submitPatrolDeleteTaskResult(created.taskId, {
+          shops: createdItems.map((createdItem) => ({
+            shopName: createdItem.shopName || "",
+            error: `任务 ${created.taskId} 数据校验未通过，已阻止推送`,
+            countrySections: createdItem.countrySections || [],
+            cartRatios: createdItem.cartRatios || [],
+            shopDone: true,
+            submissionId: createSubmissionId(created.taskId, createdItem.shopName),
+            chunkIndex: 1,
+            chunkTotal: 1,
+          })),
+        });
+        await refreshTaskViews();
+        queuePushResult.value = `任务 ${created.taskId} 数据校验未通过，已阻止推送`;
+        clearActiveQueueTask();
+        return;
+      }
+
       const pushResult = await api.enqueue_json(payload);
       if (!pushResult?.success) {
         await submitPatrolDeleteTaskResult(created.taskId, {
diff --git a/frontend-vue/src/pages/brand/components/BrandPriceTrackTab.vue b/frontend-vue/src/pages/brand/components/BrandPriceTrackTab.vue
index 5c8c5cef..43d23aae 100644
--- a/frontend-vue/src/pages/brand/components/BrandPriceTrackTab.vue
+++ b/frontend-vue/src/pages/brand/components/BrandPriceTrackTab.vue
@@ -272,6 +272,12 @@ import { getPywebviewApi, type PywebviewApi, type UploadedJavaFile } from '@/sha
 import { getTaskPollIntervalMs } from '@/shared/task-progress-config'
 import { createCategorizedTimers } from '@/shared/utils/categorized-timers'
 import { saveUrlWithProgress } from '@/shared/utils/download-progress'
+import {
+  EXCEL_CSV_EXTENSIONS,
+  checkQueuePayload,
+  checkSelectedFiles,
+} from '@/shared/dispatch-guard'
+import { passGuard } from '@/shared/dispatch-guard-ui'
 import { useZiniaoVersion } from '@/shared/utils/ziniao-version'
 import {
   addPriceTrackCandidate,
@@ -527,6 +533,7 @@ async function selectAsinFile() {
       multiple: true,
     })
     if (result?.paths?.length) {
+      if (!(await passGuard(checkSelectedFiles(result.paths, { allowedExtensions: EXCEL_CSV_EXTENSIONS })))) return
       asinFiles.value = result.paths
       asinUploadedFiles.value = await uploadAsinPathsToJava(result.paths)
       ElMessage.success(`已选择 ${result.paths.length} 个ASIN文件`)
@@ -536,6 +543,7 @@ async function selectAsinFile() {
   if (api?.select_brand_xlsx_files) {
     const paths = await api.select_brand_xlsx_files()
     if (!paths?.length) return
+    if (!(await passGuard(checkSelectedFiles(paths, { allowedExtensions: EXCEL_CSV_EXTENSIONS })))) return
     asinFiles.value = paths
     asinUploadedFiles.value = await uploadAsinPathsToJava(paths)
     ElMessage.success(`已选择 ${paths.length} 个ASIN文件`)
@@ -558,10 +566,14 @@ async function selectAsinFolder() {
       ElMessage.warning(result.error || '该文件夹下没有可用的 xlsx 文件')
       return
     }
+    if (!(await passGuard(checkSelectedFiles(result.items, { allowedExtensions: EXCEL_CSV_EXTENSIONS })))) return
     asinFiles.value = result.items.map((item) => item.relativePath || item.absolutePath)
     asinUploadedFiles.value = await uploadAsinPathsToJava(result.items)
     ElMessage.success(`已选择文件夹内 ${result.items.length} 个ASIN文件`)
   } catch (error) {
+    // 上传失败时清空选择，避免残留上一批文件让用户误以为新文件已就绪
+    asinFiles.value = []
+    asinUploadedFiles.value = []
     ElMessage.error(error instanceof Error ? error.message : '选择失败')
   }
 }
@@ -1072,6 +1084,22 @@ async function buildQueuePayload(taskVo: PriceTrackCreateTaskVo, row: PriceTrack
 
 async function enqueueCreatedTask(api: PywebviewApi, taskId: number, queuePayload: unknown) {
   if (!api.enqueue_json) throw new Error('当前环境未启用 pywebview enqueue_json')
+  // 三条推送路径（手动/串行队列/循环任务）都走这里，闸设在这一处即可全覆盖。
+  // 空 country_codes 会让 Python 端没有可遍历的站点，任务永远停在 RUNNING。
+  // asin_rows_by_country 只在 asin 模式下要求非空——status 模式下
+  // loadAsinRowsForAppClient 本就返回 {}，那是正常的。
+  const mode = (queuePayload as { data?: { mode?: unknown } } | null)?.data?.mode
+  const guard = checkQueuePayload(queuePayload, {
+    expectedType: 'price-track-run',
+    requiredDataKeys: ['task_id', 'shop_name'],
+    nonEmptyArrayKeys: ['country_codes'],
+    nonEmptyObjectKeys: mode === 'asin' ? ['asin_rows_by_country'] : [],
+  })
+  if (!(await passGuard(guard))) {
+    const reason = `任务 ${taskId} 数据校验未通过，已阻止推送到 Python 队列`
+    await compensateDispatchFailure(taskId, reason)
+    throw new Error(reason)
+  }
   let pushResult: Awaited<ReturnType<NonNullable<PywebviewApi['enqueue_json']>>>
   try {
     pushResult = await api.enqueue_json(queuePayload)
diff --git a/frontend-vue/src/pages/brand/components/BrandProductRiskTab.vue b/frontend-vue/src/pages/brand/components/BrandProductRiskTab.vue
index e18d6266..ca05c3fd 100644
--- a/frontend-vue/src/pages/brand/components/BrandProductRiskTab.vue
+++ b/frontend-vue/src/pages/brand/components/BrandProductRiskTab.vue
@@ -224,6 +224,8 @@ import { getPywebviewApi } from '@/shared/bridges/pywebview'
 import { getTaskPollIntervalMs } from '@/shared/task-progress-config'
 import { createCategorizedTimers } from '@/shared/utils/categorized-timers'
 import { saveUrlWithProgress } from '@/shared/utils/download-progress'
+import { checkQueuePayload, guardBlocked } from '@/shared/dispatch-guard'
+import { passGuard } from '@/shared/dispatch-guard-ui'
 import ZiniaoVersionSetting from '@/shared/components/ZiniaoVersionSetting.vue'
 import { useZiniaoVersion } from '@/shared/utils/ziniao-version'
 
@@ -1060,6 +1062,15 @@ function shouldBatchProductRiskQueue() {
   return productRiskListingFilter.value === 'SearchSuppressed' || productRiskListingFilter.value === 'DetailPageRemoved'
 }
 
+/** 入队前的结构校验：店铺列表或国家列表为空、payload 里混进 NaN，都会让 Python 端空转 */
+function productRiskPayloadGuard(payload: unknown) {
+  return checkQueuePayload(payload, {
+    expectedType: 'product-risk-resolve-run',
+    requiredDataKeys: ['taskId'],
+    nonEmptyArrayKeys: ['items', 'country_codes'],
+  })
+}
+
 async function processMatchedBatchQueue(toPush: ProductRiskShopQueueItem[]) {
   const api = getPywebviewApi()
   if (!api?.enqueue_json) {
@@ -1090,6 +1101,10 @@ async function processMatchedBatchQueue(toPush: ProductRiskShopQueueItem[]) {
     },
   }
   queuePayloadText.value = JSON.stringify(payload, null, 2)
+  if (!(await passGuard(productRiskPayloadGuard(payload)))) {
+    removePollingTask(taskId)
+    throw new Error('任务 ' + taskId + ' 数据校验未通过，已阻止推送')
+  }
   const pushResult = await api.enqueue_json(payload)
   if (!pushResult?.success) {
     removePollingTask(taskId)
@@ -1122,6 +1137,17 @@ async function processMatchedQueue() {
     ElMessage.warning('没有已匹配的店铺可推送')
     return
   }
+  // 一个国家都没选时 Python 端没有可遍历的站点，任务会停在执行中；在建任务之前就拦掉
+  if (!orderedCountryCodes.value.length) {
+    await passGuard(
+      guardBlocked(
+        '还没有选择国家',
+        '当前一个国家都没有勾选，推送后 Python 端没有可遍历的站点，任务会一直停在执行中。\n请先在左侧勾选至少 1 个国家。',
+        'product-risk.no-country',
+      ),
+    )
+    return
+  }
   queueWorkerRunning.value = true
   pushing.value = true
   queuePayloadText.value = ''
@@ -1168,6 +1194,10 @@ async function processMatchedQueue() {
           },
         }
         queuePayloadText.value = JSON.stringify(payload, null, 2)
+        if (!(await passGuard(productRiskPayloadGuard(payload)))) {
+          removePollingTask(taskId)
+          throw new Error('任务 ' + taskId + ' 数据校验未通过，已阻止推送')
+        }
         const pushResult = await api.enqueue_json(payload)
         if (!pushResult?.success) {
           removePollingTask(taskId)
diff --git a/frontend-vue/src/pages/brand/components/BrandPublishTab.vue b/frontend-vue/src/pages/brand/components/BrandPublishTab.vue
index 752aac98..a449ff3b 100644
--- a/frontend-vue/src/pages/brand/components/BrandPublishTab.vue
+++ b/frontend-vue/src/pages/brand/components/BrandPublishTab.vue
@@ -227,6 +227,13 @@ import { useTaskProgressLoop } from '@/shared/composables/useTaskProgressLoop'
 import { getTaskPollIntervalMs } from '@/shared/task-progress-config'
 import { createCategorizedTimers } from '@/shared/utils/categorized-timers'
 import { saveUrlWithProgress } from '@/shared/utils/download-progress'
+import {
+  EXCEL_EXTENSIONS,
+  checkParseResult,
+  checkQueuePayload,
+  checkSelectedFiles,
+} from '@/shared/dispatch-guard'
+import { passGuard } from '@/shared/dispatch-guard-ui'
 import { useZiniaoVersion, type ZiniaoVersion } from '@/shared/utils/ziniao-version'
 
 const COUNTRY_OPTIONS = [
@@ -463,12 +470,16 @@ async function selectFiles() {
   try {
     const paths = await api.select_brand_xlsx_files()
     if (!paths?.length) return
+    if (!(await passGuard(checkSelectedFiles(paths, { allowedExtensions: EXCEL_EXTENSIONS })))) return
     uploading.value = true
     const uploaded = await uploadPathsToJava(paths)
     selectedPaths.value = paths
     uploadedFiles.value = uploaded
     ElMessage.success(`已上传 ${uploaded.length} 个待上架文件`)
   } catch (error) {
+    // 上传失败时清空选择，避免残留上一批文件让用户误以为新文件已就绪
+    selectedPaths.value = []
+    uploadedFiles.value = []
     ElMessage.error(error instanceof Error ? error.message : '选择失败')
   } finally {
     uploading.value = false
@@ -489,12 +500,15 @@ async function selectFolder() {
       ElMessage.warning(result.error || '该文件夹下没有 xlsx 文件')
       return
     }
+    if (!(await passGuard(checkSelectedFiles(result.items, { allowedExtensions: EXCEL_EXTENSIONS })))) return
     uploading.value = true
     const uploaded = await uploadPathsToJava(result.items)
     selectedPaths.value = result.items.map((item) => item.relativePath || item.absolutePath)
     uploadedFiles.value = uploaded
     ElMessage.success(`已上传文件夹内 ${uploaded.length} 个 xlsx 文件`)
   } catch (error) {
+    selectedPaths.value = []
+    uploadedFiles.value = []
     ElMessage.error(error instanceof Error ? error.message : '选择失败')
   } finally {
     uploading.value = false
@@ -532,6 +546,12 @@ async function submitRun() {
       sync_countries: syncCountries.value.filter((country) => country !== publishCountry.value),
     })
     if (!parsed.taskId) throw new Error('后端未返回有效任务标识')
+    // publish 的 Vo 用 files 承载明细，没有 acceptedRows；这里先卡住 taskId 与总行数
+    const guard = checkParseResult(
+      { taskId: parsed.taskId, totalRows: parsed.totalRows, acceptedRows: parsed.totalRows },
+      { requiredColumnsHint: '店铺名 / 商品行' },
+    )
+    if (!(await passGuard(guard))) return
 
     const options: PublishDispatchOptions = {
       publishCountry: publishCountry.value,
@@ -851,6 +871,15 @@ async function processQueue() {
           await activatePublishFile(taskId, nextFileId)
           updateCurrentFile(nextFileId, { status: 'RUNNING', progressMessage: '已派发到 Python 队列' })
           const payload = buildQueuePayload(taskId, file)
+          // totalRows/totalPages 为 0 时 Python 端翻不到任何明细，会一直停在执行中
+          const guard = checkQueuePayload(payload, {
+            expectedType: 'publish-run',
+            requiredDataKeys: ['taskId', 'fileId', 'shopName', 'publish_country', 'paginationUrl'],
+            positiveNumberKeys: ['totalRows', 'totalPages'],
+          })
+          if (!(await passGuard(guard))) {
+            throw new Error(`文件 ${file.sourceFilename || nextFileId} 数据校验未通过，已阻止推送`)
+          }
           const result = await api.enqueue_json(payload)
           if (!result?.success) throw new Error(result?.error || 'Python 队列拒绝接收任务')
           queueMessage.value = pendingFileIds.value.length
diff --git a/frontend-vue/src/pages/brand/components/BrandQueryAsinTab.vue b/frontend-vue/src/pages/brand/components/BrandQueryAsinTab.vue
index 8d3deb1f..9274bd93 100644
--- a/frontend-vue/src/pages/brand/components/BrandQueryAsinTab.vue
+++ b/frontend-vue/src/pages/brand/components/BrandQueryAsinTab.vue
@@ -343,6 +343,8 @@ import { getPywebviewApi } from "@/shared/bridges/pywebview";
 import { getTaskPollIntervalMs } from "@/shared/task-progress-config";
 import { createCategorizedTimers } from "@/shared/utils/categorized-timers";
 import { saveUrlWithProgress } from "@/shared/utils/download-progress";
+import { checkQueuePayload } from "@/shared/dispatch-guard";
+import { passGuard } from "@/shared/dispatch-guard-ui";
 import ZiniaoVersionSetting from "@/shared/components/ZiniaoVersionSetting.vue";
 import { useZiniaoVersion } from "@/shared/utils/ziniao-version";
 
@@ -1050,6 +1052,32 @@ async function processQueue() {
       const payload = buildQueuePayload(created.taskId, createdItem);
       queuePayloadText.value = JSON.stringify(payload, null, 2);
 
+      // 模板里一个有效 ASIN 都没解析出来时，Python 端拿到空列表会空转，任务停在执行中
+      const guard = checkQueuePayload(payload, {
+        expectedType: "query-asin-run",
+        requiredDataKeys: ["taskId"],
+        nonEmptyArrayKeys: ["items", "query_asins"],
+      });
+      if (!(await passGuard(guard))) {
+        await submitQueryAsinTaskResult(created.taskId, {
+          shops: [
+            {
+              shopName: createdItem.shopName || nextItem.shopName || "",
+              error: `任务 ${created.taskId} 数据校验未通过，已阻止推送`,
+              shopDone: true,
+              submissionId: createSubmissionId(
+                created.taskId,
+                createdItem.shopName || nextItem.shopName,
+              ),
+            },
+          ],
+        });
+        await refreshTaskViews();
+        queuePushResult.value = `任务 ${created.taskId} 数据校验未通过，已阻止推送并继续下一个任务`;
+        clearActiveQueueTask();
+        continue;
+      }
+
       const pushResult = await api.enqueue_json(payload);
       if (!pushResult?.success) {
         await submitQueryAsinTaskResult(created.taskId, {
diff --git a/frontend-vue/src/pages/brand/components/BrandShopDataCrawlTab.vue b/frontend-vue/src/pages/brand/components/BrandShopDataCrawlTab.vue
index bad94ea0..67e4ad0a 100644
--- a/frontend-vue/src/pages/brand/components/BrandShopDataCrawlTab.vue
+++ b/frontend-vue/src/pages/brand/components/BrandShopDataCrawlTab.vue
@@ -127,6 +127,8 @@ import { getPywebviewApi } from '@/shared/bridges/pywebview'
 import { getTaskPollIntervalMs } from '@/shared/task-progress-config'
 import { createCategorizedTimers } from '@/shared/utils/categorized-timers'
 import { saveUrlWithProgress } from '@/shared/utils/download-progress'
+import { checkQueuePayload } from '@/shared/dispatch-guard'
+import { passGuard } from '@/shared/dispatch-guard-ui'
 import { mergeHistoryItems } from '@/shared/merge-history-items'
 import {
   addShopDataCrawlCandidate,
@@ -429,6 +431,15 @@ async function dispatchActiveTask(api: NonNullable<ReturnType<typeof getPywebvie
       country_codes: [...activeCountryCodes.value],
     },
   }
+  // country_codes 为空时 Python 端没有可遍历的站点，任务会一直停在执行中
+  const guard = checkQueuePayload(payload, {
+    expectedType: 'shop-data-crawl-run',
+    requiredDataKeys: ['taskId'],
+    nonEmptyArrayKeys: ['items', 'country_codes'],
+  })
+  if (!(await passGuard(guard))) {
+    throw new Error(`任务 ${activeTaskId.value} 数据校验未通过，已阻止推送`)
+  }
   const pushed = await api.enqueue_json(payload)
   if (!pushed?.success) throw new Error(pushed?.error || `任务 ${activeTaskId.value} 入队失败`)
   activeDispatched.value = true
diff --git a/frontend-vue/src/pages/brand/components/BrandSimilarAsinTab.vue b/frontend-vue/src/pages/brand/components/BrandSimilarAsinTab.vue
index 7dfc6660..b3d1d675 100644
--- a/frontend-vue/src/pages/brand/components/BrandSimilarAsinTab.vue
+++ b/frontend-vue/src/pages/brand/components/BrandSimilarAsinTab.vue
@@ -213,6 +213,13 @@ import { createCategorizedTimers } from '@/shared/utils/categorized-timers'
 import { saveUrlWithProgress } from '@/shared/utils/download-progress'
 import { createAsinForceThrottle } from '@/shared/asin-force-throttle'
 import { toParsePreview, type ParsePreviewOptions } from '@/shared/parse-preview'
+import {
+  EXCEL_EXTENSIONS,
+  checkParseResult,
+  checkQueuePayload,
+  checkSelectedFiles,
+} from '@/shared/dispatch-guard'
+import { passGuard } from '@/shared/dispatch-guard-ui'
 
 const selectedFileNames = ref<string[]>([])
 const uploadedFiles = ref<UploadFileVo[]>([])
@@ -421,12 +428,23 @@ async function selectFiles() {
   }
   const paths = await api.select_brand_xlsx_files()
   if (!paths?.length) return
-  const files = await uploadAppearancePathsToJava(paths)
-  uploadedFiles.value = files
-  selectedFileNames.value = files.map((f) => f.relativePath || f.originalFilename || f.fileKey)
-  parseResult.value = null
-  queuedTaskSummary.value = null
-  queuePayloadText.value = ''
+  if (!(await passGuard(checkSelectedFiles(paths, { allowedExtensions: EXCEL_EXTENSIONS })))) return
+  try {
+    const files = await uploadAppearancePathsToJava(paths)
+    uploadedFiles.value = files
+    selectedFileNames.value = files.map((f) => f.relativePath || f.originalFilename || f.fileKey)
+    parseResult.value = null
+    queuedTaskSummary.value = null
+    queuePayloadText.value = ''
+  } catch (error) {
+    // 上传失败时清空选择，避免残留上一批文件让用户误以为新文件已就绪
+    uploadedFiles.value = []
+    selectedFileNames.value = []
+    parseResult.value = null
+    queuedTaskSummary.value = null
+    queuePayloadText.value = ''
+    ElMessage.error(error instanceof Error ? error.message : '文件上传失败')
+  }
 }
 
 async function selectFolder() {
@@ -443,6 +461,7 @@ async function selectFolder() {
       ElMessage.warning(result.error || '该文件夹下没有可用的 xlsx 文件')
       return
     }
+    if (!(await passGuard(checkSelectedFiles(result.items, { allowedExtensions: EXCEL_EXTENSIONS })))) return
     const files = await uploadAppearancePathsToJava(result.items)
     uploadedFiles.value = files
     selectedFileNames.value = result.items.map((item) => item.relativePath || item.absolutePath)
@@ -451,6 +470,9 @@ async function selectFolder() {
     queuePayloadText.value = ''
     ElMessage.success(`已选择文件夹内 ${result.items.length} 个 Excel 文件`)
   } catch (error) {
+    uploadedFiles.value = []
+    selectedFileNames.value = []
+    parseResult.value = null
     ElMessage.error(error instanceof Error ? error.message : '选择失败')
   }
 }
@@ -473,6 +495,14 @@ async function parseFiles() {
       relativePath: f.relativePath,
     }))
     const res = await parseSimilarAsin(files, effectiveLlmApiKey(), imgSwitch.value, categorySwitch.value)
+    // 0 有效行的任务推给 Python 只会一直停在 RUNNING，这里拦下来不写入 parseResult
+    const guard = checkParseResult(res, { requiredColumnsHint: 'id / ASIN / 国家' })
+    if (!(await passGuard(guard))) {
+      parseResult.value = null
+      queuedTaskSummary.value = null
+      queuePayloadText.value = ''
+      return
+    }
     // 只保留摘要字段与有界预览行，避免数千行 items/groups 进入响应式对象
     const previewOptions: ParsePreviewOptions = { previewRowLimit: 200 }
     parseResult.value = toParsePreview(res, previewOptions) as unknown as SimilarAsinParseVo
@@ -551,6 +581,12 @@ async function pushToPythonQueue() {
       },
     }
     queuePayloadText.value = JSON.stringify(payloadForDisplay(payload), null, 2)
+    // 入队前最后一道闸：缺字段或含 NaN 的 payload 到 Python 侧会变成 None，任务卡住
+    const guard = checkQueuePayload(payload, {
+      expectedType: 'similar-asin-run',
+      requiredDataKeys: ['taskId', 'api_key', 'aliprice_usename', 'aliprice_pwd'],
+    })
+    if (!(await passGuard(guard))) return
     await activateSimilarAsinTask(taskId)
     const result = await api.enqueue_json(payload)
     if (!result?.success) {
diff --git a/frontend-vue/src/pages/brand/components/BrandSplitTab.vue b/frontend-vue/src/pages/brand/components/BrandSplitTab.vue
index 26ba0edb..8605702a 100644
--- a/frontend-vue/src/pages/brand/components/BrandSplitTab.vue
+++ b/frontend-vue/src/pages/brand/components/BrandSplitTab.vue
@@ -170,6 +170,8 @@ import { expandBrandFolderRecursive, type BrandExpandFolderItem } from '@/shared
 import { deleteSplitHistory, getExcelInfo, getSplitHistory, getSplitResultDownloadUrl, runSplit, type SplitResultItem, type SplitRunVo } from '@/shared/api/java-modules'
 import { getPywebviewApi, type UploadedJavaFile } from '@/shared/bridges/pywebview'
 import { saveUrlWithProgress } from '@/shared/utils/download-progress'
+import { EXCEL_EXTENSIONS, checkSelectedFiles, guardBlocked } from '@/shared/dispatch-guard'
+import { passGuard } from '@/shared/dispatch-guard-ui'
 
 const splitSelectedPaths = ref<string[]>([])
 const splitArchiveName = ref('')
@@ -239,8 +241,11 @@ async function selectSplitFiles() {
   try {
     const paths = await api.select_brand_xlsx_files()
     if (!paths?.length) return
+    if (!(await passGuard(checkSelectedFiles(paths, { allowedExtensions: EXCEL_EXTENSIONS })))) return
     await handleSelectedPaths(paths, `已选择 ${paths.length} 个待拆分文件`)
   } catch (error) {
+    splitSelectedPaths.value = []
+    splitUploadedFiles.value = []
     ElMessage.error(error instanceof Error ? error.message : '选择失败')
   }
 }
@@ -259,6 +264,7 @@ async function selectSplitFolder() {
 
     const result = await expandBrandFolderRecursive(folder)
     if (result.success && result.items?.length) {
+      if (!(await passGuard(checkSelectedFiles(result.items, { allowedExtensions: EXCEL_EXTENSIONS })))) return
       splitSelectedPaths.value = result.items.map((item) => item.relativePath)
       splitUploadedFiles.value = await uploadPathsToJava(result.items)
       if (splitUploadedFiles.value.length > 0) {
@@ -270,6 +276,8 @@ async function selectSplitFolder() {
 
     ElMessage.warning(result.error || '该文件夹下没有 xlsx 文件')
   } catch (error) {
+    splitSelectedPaths.value = []
+    splitUploadedFiles.value = []
     ElMessage.error(error instanceof Error ? error.message : '选择失败')
   }
 }
@@ -308,6 +316,18 @@ async function submitSplitRun() {
     splitSummary.value = result
     splitResultItems.value = result.items || []
     await loadSplitHistory()
+    if (result.total > 0 && result.successCount === 0) {
+      await passGuard(
+        guardBlocked(
+          '拆分未成功',
+          `本次提交的 ${result.total} 个文件全部处理失败。\n` +
+            '常见原因是表头列名与所选保留列对不上，或文件内没有数据行。\n' +
+            '请在右侧结果列表查看每个文件的失败原因后重试。',
+          'split.all-failed',
+        ),
+      )
+      return
+    }
     ElMessage.success('数据拆分完成')
   } catch (error) {
     ElMessage.error(error instanceof Error ? error.message : '数据拆分失败')
diff --git a/frontend-vue/src/pages/brand/components/BrandWithdrawTab.vue b/frontend-vue/src/pages/brand/components/BrandWithdrawTab.vue
index 35e724cc..be03664a 100644
--- a/frontend-vue/src/pages/brand/components/BrandWithdrawTab.vue
+++ b/frontend-vue/src/pages/brand/components/BrandWithdrawTab.vue
@@ -356,6 +356,8 @@ import { getPywebviewApi } from "@/shared/bridges/pywebview";
 import { getTaskPollIntervalMs } from "@/shared/task-progress-config";
 import { createCategorizedTimers } from "@/shared/utils/categorized-timers";
 import { saveUrlWithProgress } from "@/shared/utils/download-progress";
+import { checkQueuePayload } from "@/shared/dispatch-guard";
+import { passGuard } from "@/shared/dispatch-guard-ui";
 import ZiniaoVersionSetting from "@/shared/components/ZiniaoVersionSetting.vue";
 import { useZiniaoVersion } from "@/shared/utils/ziniao-version";
 
@@ -1161,6 +1163,27 @@ async function processQueue() {
       const payload = buildQueuePayload(created.taskId, nextBatch);
       queuePayloadText.value = JSON.stringify(payload, null, 2);
 
+      const guard = checkQueuePayload(payload, {
+        expectedType: "withdraw-run",
+        requiredDataKeys: ["task_id"],
+        nonEmptyArrayKeys: ["items"],
+      });
+      if (!(await passGuard(guard))) {
+        await submitWithdrawTaskResult(created.taskId, {
+          shops: nextBatch.items.map((item) => ({
+            shopName: item.shopName || "",
+            error: `任务 ${created.taskId} 数据校验未通过，已阻止推送`,
+            shopDone: true,
+            submissionId: createSubmissionId(created.taskId, item.shopName),
+            rows: [],
+          })),
+        });
+        await refreshTaskViews();
+        queuePushResult.value = `任务 ${created.taskId} 数据校验未通过，已阻止推送并继续下一个任务`;
+        clearActiveQueueTask();
+        continue;
+      }
+
       const pushResult = await api.enqueue_json(payload);
       if (!pushResult?.success) {
         await submitWithdrawTaskResult(created.taskId, {
diff --git a/frontend-vue/src/shared/dispatch-guard-ui.ts b/frontend-vue/src/shared/dispatch-guard-ui.ts
new file mode 100644
index 00000000..35ecac8c
--- /dev/null
+++ b/frontend-vue/src/shared/dispatch-guard-ui.ts
@@ -0,0 +1,67 @@
+/**
+ * dispatch-guard 的界面层（Task 101）。
+ *
+ * 把 GuardResult 渲染成模态框：block 级用 alert（红色、只有「知道了」，
+ * 必须点掉），confirm 级用 confirm（「仍然继续」/「取消」）。之所以不用
+ * ElMessage toast，是因为这些提示直接决定要不要把任务推给 Python 自动化，
+ * 3 秒自动消失的 toast 很容易被划过去。
+ *
+ * 与 dispatch-guard.ts 分开放，是为了让核心校验保持纯 TS、可以用
+ * `node --test` 直接跑，不必把 Element Plus 拉进测试环境。
+ */
+import { ElMessageBox } from 'element-plus'
+import type { GuardResult } from './dispatch-guard.ts'
+
+/** 配套样式见 src/styles/main.css 的 .dispatch-guard-box（保留换行、限制宽度） */
+const GUARD_BOX_CLASS = 'dispatch-guard-box'
+
+async function alertBlocked(result: GuardResult) {
+  try {
+    await ElMessageBox.alert(result.message, result.title, {
+      type: 'error',
+      confirmButtonText: '知道了',
+      customClass: GUARD_BOX_CLASS,
+      dangerouslyUseHTMLString: false,
+    })
+  } catch {
+    // 用户按 ESC / 点遮罩关闭，同样视为已知悉；拦截结果不受影响
+  }
+}
+
+async function confirmSuspicious(result: GuardResult) {
+  try {
+    await ElMessageBox.confirm(result.message, result.title, {
+      type: 'warning',
+      confirmButtonText: '仍然继续',
+      cancelButtonText: '取消',
+      customClass: GUARD_BOX_CLASS,
+      dangerouslyUseHTMLString: false,
+    })
+    return true
+  } catch {
+    return false
+  }
+}
+
+/**
+ * 按顺序处理若干校验结果，返回是否放行。
+ *
+ * - 任一结果含 block 级问题：弹 alert 并返回 false（调用方直接 return）。
+ * - 只含 confirm 级问题：弹 confirm，用户点「仍然继续」返回 true，否则 false。
+ * - 全部通过：不弹任何东西，返回 true。
+ *
+ * 用法：
+ *   if (!(await passGuard(checkParseResult(vo)))) return
+ */
+export async function passGuard(...results: GuardResult[]): Promise<boolean> {
+  const blocked = results.find((result) => !result.ok)
+  if (blocked) {
+    await alertBlocked(blocked)
+    return false
+  }
+  for (const result of results) {
+    if (!result.needsConfirm) continue
+    if (!(await confirmSuspicious(result))) return false
+  }
+  return true
+}
diff --git a/frontend-vue/src/shared/dispatch-guard.ts b/frontend-vue/src/shared/dispatch-guard.ts
new file mode 100644
index 00000000..e18cebef
--- /dev/null
+++ b/frontend-vue/src/shared/dispatch-guard.ts
@@ -0,0 +1,661 @@
+/**
+ * 上传 / 解析 / 入队三道闸（Task 101）。
+ *
+ * 现状：各 Tab 选完文件直接 upload_file_to_java，解析成功就把 taskId 交给
+ * pushToPythonQueue，enqueue_json 之前只判断 taskId 是否为真值。于是
+ * 「表头对不上导致 0 条有效行」「country_codes 为空」「payload 里混进 NaN」
+ * 这类问题都会被原样推给 Python 自动化——Python 端拿到空任务后既不报错也
+ * 没得可做，任务永远停在 RUNNING，前端就一直轮询，表现为「卡住」。
+ *
+ * 本模块把这三处收敛成统一校验，全部在界面侧拦截：
+ *   - checkSelectedFiles：文件选完、上传前，挡掉空选择 / 非法扩展名 / 超量。
+ *   - checkParseResult：Java 解析返回后，挡掉无效 taskId 与 0 有效行；
+ *     部分行被丢弃降级为 confirm，由用户决定是否继续。
+ *   - checkQueuePayload：enqueue_json 前的最后一道闸，挡掉缺字段、空数组，
+ *     以及 JSON.stringify 会静默改写或直接抛错的值（NaN/Infinity → null、
+ *     BigInt → 抛错、循环引用 → 抛错），这些到了 Python 侧就是 None。
+ *
+ * 纯 TS 无副作用模块：不引入 Vue / Element Plus，输入对象永不修改，任何输入
+ * 都返回 GuardResult 而不抛错（弹窗文案由 dispatch-guard-ui 负责渲染）。
+ */
+
+/** block：必须修数据，禁止继续；confirm：可疑但可继续，需用户确认 */
+export type GuardSeverity = 'block' | 'confirm'
+
+export interface GuardIssue {
+  /** 稳定的问题码，便于日志与测试断言 */
+  code: string
+  /** 面向用户的中文说明 */
+  message: string
+  severity: GuardSeverity
+}
+
+export interface GuardResult {
+  /** 没有任何 block 级问题 */
+  ok: boolean
+  /** 存在 confirm 级问题，需要用户点确认才能继续 */
+  needsConfirm: boolean
+  /** 模态框标题 */
+  title: string
+  /** 汇总文案，多条问题按换行拼接 */
+  message: string
+  issues: GuardIssue[]
+}
+
+/** 常用扩展名白名单 */
+export const EXCEL_EXTENSIONS = ['.xlsx', '.xls'] as const
+export const EXCEL_CSV_EXTENSIONS = ['.xlsx', '.xls', '.csv'] as const
+
+/** JSON 嵌套深度上限，超过基本可以断定是环或异常结构 */
+const MAX_JSON_DEPTH = 64
+/** 单次扫描的节点数上限，避免超大 payload 卡住 UI 线程 */
+const MAX_JSON_NODES = 200_000
+
+function buildResult(
+  blockTitle: string,
+  confirmTitle: string,
+  issues: GuardIssue[],
+): GuardResult {
+  const blocking = issues.filter((issue) => issue.severity === 'block')
+  const confirming = issues.filter((issue) => issue.severity === 'confirm')
+  // 有 block 时只展示 block，避免把「可继续」的提示和「不可继续」的混在一个弹窗里
+  const shown = blocking.length ? blocking : confirming
+  return {
+    ok: blocking.length === 0,
+    needsConfirm: blocking.length === 0 && confirming.length > 0,
+    title: blocking.length ? blockTitle : confirmTitle,
+    message: shown.map((issue) => issue.message).join('\n'),
+    issues,
+  }
+}
+
+/** 一个恒定放行的结果，供调用方在无需校验时占位 */
+export function guardPassed(): GuardResult {
+  return buildResult('', '', [])
+}
+
+/**
+ * 手工构造一个 block 级结果，用于那些不属于文件/解析/payload 三类、
+ * 但同样会让 Python 端空转的前置条件（例如「一个国家都没选」）。
+ */
+export function guardBlocked(
+  title: string,
+  message: string,
+  code = 'precondition.failed',
+): GuardResult {
+  return buildResult(title, title, [{ code, severity: 'block', message }])
+}
+
+function isPlainObject(value: unknown): value is Record<string, unknown> {
+  if (typeof value !== 'object' || value === null) return false
+  if (Array.isArray(value)) return false
+  const proto = Object.getPrototypeOf(value)
+  return proto === Object.prototype || proto === null
+}
+
+function isNonNegativeInteger(value: unknown): value is number {
+  return typeof value === 'number' && Number.isFinite(value) && Number.isInteger(value) && value >= 0
+}
+
+function isPositiveInteger(value: unknown): value is number {
+  return isNonNegativeInteger(value) && value > 0
+}
+
+/** 从本地路径里取出文件名，同时兼容 Windows 反斜杠与 POSIX 斜杠 */
+export function basenameOf(path: string): string {
+  const segments = String(path).split(/[/\\]/)
+  for (let i = segments.length - 1; i >= 0; i -= 1) {
+    if (segments[i]) return segments[i]
+  }
+  return ''
+}
+
+/** 取小写扩展名（含点）；无扩展名返回空串 */
+export function extensionOf(path: string): string {
+  const name = basenameOf(path)
+  const dot = name.lastIndexOf('.')
+  if (dot <= 0 || dot === name.length - 1) return ''
+  return name.slice(dot).toLowerCase()
+}
+
+export interface SelectedFilesOptions {
+  /** 允许的扩展名（小写含点）；不传表示不限制 */
+  allowedExtensions?: readonly string[]
+  /** 单次允许选择的最大文件数 */
+  maxFiles?: number
+  /** 弹窗标题 */
+  title?: string
+}
+
+/** 选择结果里的一项：本地绝对路径字符串，或 expandBrandFolderRecursive 返回的条目 */
+export type SelectedFileInput =
+  | string
+  | {
+      absolutePath?: string
+      relativePath?: string
+    }
+
+function resolveSelectedPath(item: SelectedFileInput): string {
+  if (typeof item === 'string') return item.trim()
+  if (typeof item === 'object' && item !== null) {
+    const record = item as { absolutePath?: unknown; relativePath?: unknown }
+    if (typeof record.absolutePath === 'string' && record.absolutePath.trim()) {
+      return record.absolutePath.trim()
+    }
+    if (typeof record.relativePath === 'string' && record.relativePath.trim()) {
+      return record.relativePath.trim()
+    }
+  }
+  return ''
+}
+
+/**
+ * 文件选择校验：在 upload_file_to_java 之前跑，挡掉根本不该上传的输入。
+ * 扩展名不匹配一律 block —— 把 .txt 改名成 .xlsx 交给 Java 解析只会得到
+ * 一个语焉不详的后端错误，不如在选择时就说清楚。
+ */
+export function checkSelectedFiles(
+  paths: unknown,
+  options: SelectedFilesOptions = {},
+): GuardResult {
+  const blockTitle = options.title || '文件选择有问题'
+  const confirmTitle = '选择的文件需要确认'
+  const issues: GuardIssue[] = []
+
+  if (!Array.isArray(paths)) {
+    issues.push({
+      code: 'files.not-array',
+      severity: 'block',
+      message: '没有拿到文件列表，请重新选择文件。',
+    })
+    return buildResult(blockTitle, confirmTitle, issues)
+  }
+  if (!paths.length) {
+    issues.push({
+      code: 'files.empty',
+      severity: 'block',
+      message: '没有选择任何文件，请先选择要处理的文件。',
+    })
+    return buildResult(blockTitle, confirmTitle, issues)
+  }
+
+  const maxFiles = options.maxFiles
+  if (maxFiles != null && maxFiles > 0 && paths.length > maxFiles) {
+    issues.push({
+      code: 'files.too-many',
+      severity: 'block',
+      message: `一次最多选择 ${maxFiles} 个文件，当前选了 ${paths.length} 个，请分批处理。`,
+    })
+  }
+
+  const allowed = options.allowedExtensions
+    ? options.allowedExtensions.map((ext) => ext.toLowerCase())
+    : null
+  const invalidNames: string[] = []
+  let blankCount = 0
+  const seen = new Set<string>()
+  const duplicated: string[] = []
+
+  for (const item of paths as SelectedFileInput[]) {
+    const resolved = resolveSelectedPath(item)
+    if (!resolved) {
+      blankCount += 1
+      continue
+    }
+    const key = resolved.toLowerCase()
+    if (seen.has(key)) {
+      const name = basenameOf(resolved)
+      if (!duplicated.includes(name)) duplicated.push(name)
+    } else {
+      seen.add(key)
+    }
+    if (allowed) {
+      const ext = extensionOf(resolved)
+      if (!allowed.includes(ext)) {
+        const name = basenameOf(resolved) || resolved
+        if (!invalidNames.includes(name)) invalidNames.push(name)
+      }
+    }
+  }
+
+  if (blankCount) {
+    issues.push({
+      code: 'files.blank-path',
+      severity: 'block',
+      message: `有 ${blankCount} 个文件路径为空，无法上传，请重新选择。`,
+    })
+  }
+  if (invalidNames.length && allowed) {
+    issues.push({
+      code: 'files.bad-extension',
+      severity: 'block',
+      message:
+        `以下文件类型不支持：${formatNameList(invalidNames)}\n` +
+        `当前只接受 ${allowed.join(' / ')} 格式，请转换后重新选择。`,
+    })
+  }
+  if (duplicated.length) {
+    issues.push({
+      code: 'files.duplicated',
+      severity: 'confirm',
+      message: `以下文件被重复选择，会被处理多次：${formatNameList(duplicated)}\n确认继续吗？`,
+    })
+  }
+
+  return buildResult(blockTitle, confirmTitle, issues)
+}
+
+function formatNameList(names: string[], limit = 5): string {
+  if (names.length <= limit) return names.join('、')
+  return `${names.slice(0, limit).join('、')} 等 ${names.length} 个`
+}
+
+/** 各模块 parse 接口返回的公共统计字段 */
+export interface ParseOutcome {
+  taskId?: unknown
+  totalRows?: unknown
+  acceptedRows?: unknown
+  droppedRows?: unknown
+  groupCount?: unknown
+  sourceFilename?: unknown
+}
+
+export interface ParseResultOptions {
+  /** 该模块必须解析出分组才能执行（如 appearance-patent 按主 ID 分组） */
+  requireGroups?: boolean
+  /** 必须解析出有效行；默认 true */
+  requireRows?: boolean
+  /** 必要字段名，用于拼「缺什么」的提示，如 'ASIN / 国家' */
+  requiredColumnsHint?: string
+  title?: string
+}
+
+/**
+ * 解析结果校验：Java 返回后、把 taskId 交给推送按钮之前跑。
+ *
+ * 0 有效行是最危险的情况——任务在库里建好了，推给 Python 后没有任何明细可
+ * 执行，任务会一直停在 RUNNING。这里一律 block。
+ * 部分行被丢弃则降级成 confirm：日常确实存在「几行没 ASIN 也照跑」的用法，
+ * 但要让用户明确知道少了多少行。
+ */
+export function checkParseResult(
+  result: unknown,
+  options: ParseResultOptions = {},
+): GuardResult {
+  const blockTitle = options.title || '解析结果无法执行'
+  const confirmTitle = '解析结果需要确认'
+  const issues: GuardIssue[] = []
+
+  if (!isPlainObject(result)) {
+    issues.push({
+      code: 'parse.not-object',
+      severity: 'block',
+      message: '后端没有返回解析结果，请重新解析。',
+    })
+    return buildResult(blockTitle, confirmTitle, issues)
+  }
+
+  const vo = result as ParseOutcome
+  if (!isPositiveInteger(vo.taskId)) {
+    issues.push({
+      code: 'parse.bad-task-id',
+      severity: 'block',
+      message: `后端未返回有效任务标识（taskId=${String(vo.taskId)}），请重新解析。`,
+    })
+    // taskId 都不对，后面的行数统计没有讨论价值
+    return buildResult(blockTitle, confirmTitle, issues)
+  }
+
+  const totalRows = normalizeCount(vo.totalRows)
+  const acceptedRows = normalizeCount(vo.acceptedRows)
+  const droppedRows = normalizeCount(vo.droppedRows)
+  const groupCount = normalizeCount(vo.groupCount)
+
+  for (const [field, raw, parsed] of [
+    ['totalRows', vo.totalRows, totalRows],
+    ['acceptedRows', vo.acceptedRows, acceptedRows],
+    ['droppedRows', vo.droppedRows, droppedRows],
+    ['groupCount', vo.groupCount, groupCount],
+  ] as const) {
+    if (raw != null && parsed == null) {
+      issues.push({
+        code: 'parse.bad-count',
+        severity: 'block',
+        message: `解析结果字段 ${field} 异常（${String(raw)}），无法判断数据量，请重新解析。`,
+      })
+    }
+  }
+  if (issues.length) return buildResult(blockTitle, confirmTitle, issues)
+
+  const requireRows = options.requireRows !== false
+  const columnsHint = options.requiredColumnsHint
+    ? `（必要字段：${options.requiredColumnsHint}）`
+    : ''
+
+  if (requireRows && acceptedRows === 0) {
+    if (!totalRows) {
+      issues.push({
+        code: 'parse.empty-file',
+        severity: 'block',
+        message:
+          '文件里没有读到任何数据行。\n' +
+          '请确认文件不是空表、数据不在隐藏的其他 Sheet 里，然后重新上传。',
+      })
+    } else {
+      issues.push({
+        code: 'parse.all-dropped',
+        severity: 'block',
+        message:
+          `共读取 ${totalRows} 行，但没有一行包含完整的必要字段${columnsHint}，全部被丢弃。\n` +
+          '推送这样的任务会让 Python 端拿不到任何可执行明细、任务一直卡在执行中。\n' +
+          '请检查表头列名是否与模板一致，修正后重新上传解析。',
+      })
+    }
+    return buildResult(blockTitle, confirmTitle, issues)
+  }
+
+  if (options.requireGroups && groupCount === 0) {
+    issues.push({
+      code: 'parse.no-group',
+      severity: 'block',
+      message:
+        '解析出了数据行，但没有生成任何分组，Python 端会没有可执行的批次。\n' +
+        '请检查主 ID 列是否填写正确，修正后重新解析。',
+    })
+    return buildResult(blockTitle, confirmTitle, issues)
+  }
+
+  if (droppedRows && droppedRows > 0) {
+    const accepted = acceptedRows ?? 0
+    const total = totalRows || accepted + droppedRows
+    issues.push({
+      code: 'parse.partial-dropped',
+      severity: 'confirm',
+      message:
+        `共 ${total} 行，其中 ${droppedRows} 行因缺少必要字段${columnsHint}被丢弃，` +
+        `只有 ${accepted} 行会被执行。\n` +
+        `确认按这 ${accepted} 行继续吗？`,
+    })
+  }
+
+  return buildResult(blockTitle, confirmTitle, issues)
+}
+
+function normalizeCount(value: unknown): number | null {
+  if (value == null) return null
+  if (isNonNegativeInteger(value)) return value
+  return null
+}
+
+export interface QueuePayloadOptions {
+  /** data 下必须存在且非空的字段名 */
+  requiredDataKeys?: readonly string[]
+  /** data 下必须是非空数组的字段名 */
+  nonEmptyArrayKeys?: readonly string[]
+  /** data 下必须是非空对象（或非空数组）的字段名 */
+  nonEmptyObjectKeys?: readonly string[]
+  /**
+   * data 下必须是正数的字段名。用于「行数 / 页数」这类为 0 就等于没活干的字段——
+   * 它们不是 null，requiredDataKeys 拦不住，但 0 会让 Python 端翻 0 页后空转。
+   */
+  positiveNumberKeys?: readonly string[]
+  /** 期望的 type 值；不匹配时 block */
+  expectedType?: string
+  title?: string
+}
+
+/**
+ * 入队 payload 校验：api.enqueue_json(payload) 之前的最后一道闸。
+ *
+ * 除了业务字段，这里重点扫 JSON 安全性。pywebview 桥接会对 payload 做
+ * JSON 序列化，而 JSON.stringify 对几类值的处理是「静默改写」而不是报错：
+ * NaN / Infinity 变成 null，undefined 属性被丢掉，数组里的 undefined 变
+ * null。Python 侧 payload["data"]["taskId"] 于是成了 None，自动化脚本要么
+ * 在某个循环里空转，要么抛异常被吞掉——两种都表现为任务卡住。
+ */
+export function checkQueuePayload(
+  payload: unknown,
+  options: QueuePayloadOptions = {},
+): GuardResult {
+  const title = options.title || '任务数据不完整，已阻止推送'
+  const issues: GuardIssue[] = []
+
+  if (!isPlainObject(payload)) {
+    issues.push({
+      code: 'payload.not-object',
+      severity: 'block',
+      message: '任务数据格式异常（不是一个对象），已阻止推送到 Python 队列。',
+    })
+    return buildResult(title, title, issues)
+  }
+
+  const type = payload.type
+  if (typeof type !== 'string' || !type.trim()) {
+    issues.push({
+      code: 'payload.bad-type',
+      severity: 'block',
+      message: '任务数据缺少 type 字段，Python 端无法识别该任务类型。',
+    })
+  } else if (options.expectedType && type !== options.expectedType) {
+    issues.push({
+      code: 'payload.type-mismatch',
+      severity: 'block',
+      message: `任务类型异常：期望 ${options.expectedType}，实际 ${type}。`,
+    })
+  }
+
+  const data = payload.data
+  if (!isPlainObject(data)) {
+    issues.push({
+      code: 'payload.bad-data',
+      severity: 'block',
+      message: '任务数据缺少 data 内容，已阻止推送到 Python 队列。',
+    })
+    return buildResult(title, title, issues)
+  }
+
+  const missing: string[] = []
+  for (const key of options.requiredDataKeys || []) {
+    const value = data[key]
+    if (value == null || (typeof value === 'string' && !value.trim())) {
+      missing.push(key)
+    } else if (typeof value === 'number' && !Number.isFinite(value)) {
+      missing.push(key)
+    }
+  }
+  if (missing.length) {
+    issues.push({
+      code: 'payload.missing-field',
+      severity: 'block',
+      message:
+        `任务数据缺少必填字段：${missing.join('、')}。\n` +
+        '推送后 Python 端会拿到空值并卡在执行中，请补全后重试。',
+    })
+  }
+
+  const emptyArrays: string[] = []
+  for (const key of options.nonEmptyArrayKeys || []) {
+    const value = data[key]
+    if (!Array.isArray(value) || value.length === 0) {
+      emptyArrays.push(key)
+    }
+  }
+  if (emptyArrays.length) {
+    issues.push({
+      code: 'payload.empty-array',
+      severity: 'block',
+      message:
+        `任务数据里 ${emptyArrays.join('、')} 是空的，没有任何可执行内容。\n` +
+        '推送这样的任务，Python 端会没得可做、任务一直停在执行中。',
+    })
+  }
+
+  const emptyObjects: string[] = []
+  for (const key of options.nonEmptyObjectKeys || []) {
+    const value = data[key]
+    if (Array.isArray(value)) {
+      if (!value.length) emptyObjects.push(key)
+    } else if (!isPlainObject(value) || Object.keys(value).length === 0) {
+      emptyObjects.push(key)
+    }
+  }
+  if (emptyObjects.length) {
+    issues.push({
+      code: 'payload.empty-object',
+      severity: 'block',
+      message:
+        `任务数据里 ${emptyObjects.join('、')} 没有任何内容。\n` +
+        '推送这样的任务，Python 端会没得可做、任务一直停在执行中。',
+    })
+  }
+
+  const nonPositive: string[] = []
+  for (const key of options.positiveNumberKeys || []) {
+    const value = data[key]
+    if (typeof value !== 'number' || !Number.isFinite(value) || value <= 0) {
+      nonPositive.push(`${key}=${String(value)}`)
+    }
+  }
+  if (nonPositive.length) {
+    issues.push({
+      code: 'payload.non-positive',
+      severity: 'block',
+      message:
+        `任务数据里 ${nonPositive.join('、')}，等于没有可处理的内容。\n` +
+        '推送这样的任务，Python 端会翻不到任何明细、任务一直停在执行中。\n' +
+        '请检查源文件是否解析出了数据行。',
+    })
+  }
+
+  const unsafe = findUnsafeJsonPaths(payload)
+  if (unsafe.length) {
+    issues.push({
+      code: 'payload.unsafe-json',
+      severity: 'block',
+      message:
+        '任务数据里存在无法正确传给 Python 的值：\n' +
+        unsafe.slice(0, 8).map((item) => `· ${item.path}：${item.reason}`).join('\n') +
+        (unsafe.length > 8 ? `\n· 另有 ${unsafe.length - 8} 处` : '') +
+        '\n这些值序列化后会变成 null 或直接报错，请修正后重试。',
+    })
+  }
+
+  return buildResult(title, title, issues)
+}
+
+export interface UnsafeJsonPath {
+  /** 形如 data.items[0].price 的定位路径 */
+  path: string
+  /** 中文原因说明 */
+  reason: string
+}
+
+/**
+ * 扫描对象里所有无法安全 JSON 序列化的值。
+ * 只报告问题，不修改输入；遇到循环引用会记录并停止向下遍历，不会死循环。
+ *
+ * 注意：对象属性值为 undefined 不算问题——那是 JS 里表达「可选字段没填」的
+ * 惯用写法（payload 里到处是 `taskNo: vo?.taskNo`），序列化时整个 key 被丢掉，
+ * Python 侧 .get() 拿到 None 正是预期行为。必填字段由 requiredDataKeys 单独把关。
+ * 但数组元素里的 undefined 会变成 null、打乱下标语义，仍然报告。
+ */
+export function findUnsafeJsonPaths(root: unknown): UnsafeJsonPath[] {
+  const found: UnsafeJsonPath[] = []
+  const ancestors = new Set<object>()
+  let nodes = 0
+  let truncated = false
+
+  function walk(value: unknown, path: string, depth: number, inArray: boolean) {
+    if (truncated) return
+    nodes += 1
+    if (nodes > MAX_JSON_NODES) {
+      truncated = true
+      found.push({ path, reason: '数据量过大，无法完成校验' })
+      return
+    }
+    if (depth > MAX_JSON_DEPTH) {
+      found.push({ path, reason: `嵌套层级超过 ${MAX_JSON_DEPTH} 层` })
+      return
+    }
+
+    const type = typeof value
+    if (value === null) return
+    if (type === 'number') {
+      if (!Number.isFinite(value as number)) {
+        found.push({
+          path,
+          reason: `${String(value)} 会被序列化成 null`,
+        })
+      }
+      return
+    }
+    if (type === 'string' || type === 'boolean') return
+    if (type === 'undefined') {
+      if (inArray) {
+        found.push({ path, reason: '数组元素为 undefined，会变成 null' })
+      }
+      return
+    }
+    if (type === 'function') {
+      found.push({ path, reason: '值是函数，无法序列化' })
+      return
+    }
+    if (type === 'symbol') {
+      found.push({ path, reason: '值是 Symbol，无法序列化' })
+      return
+    }
+    if (type === 'bigint') {
+      found.push({ path, reason: '值是 BigInt，序列化时会直接抛错' })
+      return
+    }
+    if (type !== 'object') return
+
+    const object = value as object
+    if (ancestors.has(object)) {
+      found.push({ path, reason: '存在循环引用，序列化时会直接抛错' })
+      return
+    }
+
+    // Date 有 toJSON，能安全序列化成字符串
+    if (object instanceof Date) {
+      if (Number.isNaN(object.getTime())) {
+        found.push({ path, reason: '是一个无效日期，会被序列化成 null' })
+      }
+      return
+    }
+    if (object instanceof Map || object instanceof Set) {
+      found.push({
+        path,
+        reason: `是 ${object instanceof Map ? 'Map' : 'Set'}，会被序列化成空对象 {}`,
+      })
+      return
+    }
+
+    ancestors.add(object)
+    try {
+      if (Array.isArray(object)) {
+        for (let i = 0; i < object.length; i += 1) {
+          if (!(i in object)) {
+            found.push({ path: `${path}[${i}]`, reason: '数组存在空洞，会变成 null' })
+            continue
+          }
+          walk(object[i], `${path}[${i}]`, depth + 1, true)
+        }
+      } else {
+        for (const key of Object.keys(object)) {
+          walk(
+            (object as Record<string, unknown>)[key],
+            path ? `${path}.${key}` : key,
+            depth + 1,
+            false,
+          )
+        }
+      }
+    } finally {
+      ancestors.delete(object)
+    }
+  }
+
+  walk(root, 'payload', 0, false)
+  return found
+}
diff --git a/frontend-vue/src/styles/main.css b/frontend-vue/src/styles/main.css
index ece638a2..9a107033 100644
--- a/frontend-vue/src/styles/main.css
+++ b/frontend-vue/src/styles/main.css
@@ -119,3 +119,21 @@ html {
   outline: 2px solid rgba(96, 165, 250, 0.9);
   outline-offset: 2px;
 }
+
+/*
+ * 上传 / 解析 / 入队拦截弹窗（src/shared/dispatch-guard-ui.ts）。
+ * 文案是多行的「问题 + 怎么修」，需要保留换行，并给长文件名留出折行空间。
+ */
+.dispatch-guard-box {
+  max-width: 520px;
+  width: min(520px, calc(100vw - 32px));
+}
+
+.dispatch-guard-box .el-message-box__message {
+  white-space: pre-line;
+  line-height: 1.65;
+  word-break: break-word;
+  max-height: 50vh;
+  overflow-y: auto;
+}
+
diff --git a/frontend-vue/tests/dispatch-guard.test.ts b/frontend-vue/tests/dispatch-guard.test.ts
new file mode 100644
index 00000000..082dc8b0
--- /dev/null
+++ b/frontend-vue/tests/dispatch-guard.test.ts
@@ -0,0 +1,442 @@
+import { test } from 'node:test'
+import assert from 'node:assert/strict'
+import {
+  EXCEL_CSV_EXTENSIONS,
+  EXCEL_EXTENSIONS,
+  basenameOf,
+  checkParseResult,
+  checkQueuePayload,
+  checkSelectedFiles,
+  extensionOf,
+  findUnsafeJsonPaths,
+  guardPassed,
+  type GuardResult,
+} from '../src/shared/dispatch-guard.ts'
+
+function codes(result: GuardResult) {
+  return result.issues.map((issue) => issue.code)
+}
+
+// ---------------------------------------------------------------- 路径工具
+
+test('test_task_101_dispatch_guard_normal_path_helpers', () => {
+  assert.equal(basenameOf('D:\\brand\\鲍丽明.xlsx'), '鲍丽明.xlsx')
+  assert.equal(basenameOf('/home/u/a/b.csv'), 'b.csv')
+  assert.equal(basenameOf('plain.xlsx'), 'plain.xlsx')
+  assert.equal(basenameOf('D:\\brand\\'), 'brand', '结尾斜杠不应产生空名')
+  assert.equal(extensionOf('D:\\brand\\鲍丽明.XLSX'), '.xlsx', '扩展名统一小写')
+  assert.equal(extensionOf('archive.tar.gz'), '.gz')
+  assert.equal(extensionOf('noext'), '')
+  assert.equal(extensionOf('.gitignore'), '', '隐藏文件不算扩展名')
+  assert.equal(extensionOf('trailingdot.'), '')
+})
+
+// ------------------------------------------------------------ 文件选择校验
+
+test('test_task_101_dispatch_guard_normal_selected_files_pass', () => {
+  const result = checkSelectedFiles(
+    ['D:\\brand\\a.xlsx', 'D:\\brand\\b.XLS'],
+    { allowedExtensions: EXCEL_EXTENSIONS },
+  )
+  assert.equal(result.ok, true)
+  assert.equal(result.needsConfirm, false)
+  assert.equal(result.message, '')
+  assert.deepEqual(codes(result), [])
+})
+
+test('test_task_101_dispatch_guard_normal_selected_files_folder_items', () => {
+  // expandBrandFolderRecursive 返回的是 {absolutePath, relativePath} 结构
+  const result = checkSelectedFiles(
+    [
+      { absolutePath: 'D:\\brand\\x\\a.xlsx', relativePath: 'x/a.xlsx' },
+      { relativePath: 'x/b.csv' },
+    ],
+    { allowedExtensions: EXCEL_CSV_EXTENSIONS },
+  )
+  assert.equal(result.ok, true)
+})
+
+test('test_task_101_dispatch_guard_boundary_selected_files_single', () => {
+  const result = checkSelectedFiles(['a.xlsx'], { allowedExtensions: EXCEL_EXTENSIONS, maxFiles: 1 })
+  assert.equal(result.ok, true)
+  const over = checkSelectedFiles(['a.xlsx', 'b.xlsx'], {
+    allowedExtensions: EXCEL_EXTENSIONS,
+    maxFiles: 1,
+  })
+  assert.equal(over.ok, false)
+  assert.ok(codes(over).includes('files.too-many'))
+  assert.match(over.message, /一次最多选择 1 个文件/)
+})
+
+test('test_task_101_dispatch_guard_boundary_selected_files_empty', () => {
+  const empty = checkSelectedFiles([])
+  assert.equal(empty.ok, false)
+  assert.deepEqual(codes(empty), ['files.empty'])
+  assert.match(empty.message, /没有选择任何文件/)
+})
+
+test('test_task_101_dispatch_guard_invalid_selected_files_bad_extension', () => {
+  const result = checkSelectedFiles(
+    ['D:\\brand\\good.xlsx', 'D:\\brand\\报表.txt', 'D:\\brand\\note.pdf'],
+    { allowedExtensions: EXCEL_EXTENSIONS },
+  )
+  assert.equal(result.ok, false)
+  assert.deepEqual(codes(result), ['files.bad-extension'])
+  assert.match(result.message, /报表\.txt/)
+  assert.match(result.message, /note\.pdf/)
+  assert.ok(!result.message.includes('good.xlsx'), '合规文件不应出现在错误里')
+})
+
+test('test_task_101_dispatch_guard_invalid_selected_files_not_array', () => {
+  for (const bad of [null, undefined, 'a.xlsx', 42, {}]) {
+    const result = checkSelectedFiles(bad)
+    assert.equal(result.ok, false, `${String(bad)} 应被拦截`)
+    assert.deepEqual(codes(result), ['files.not-array'])
+  }
+})
+
+test('test_task_101_dispatch_guard_invalid_selected_files_blank_path', () => {
+  const result = checkSelectedFiles(['a.xlsx', '', '   ', { absolutePath: '' }])
+  assert.equal(result.ok, false)
+  assert.ok(codes(result).includes('files.blank-path'))
+  assert.match(result.message, /有 3 个文件路径为空/)
+})
+
+test('test_task_101_dispatch_guard_confirm_selected_files_duplicated', () => {
+  const result = checkSelectedFiles(['D:\\a.xlsx', 'd:\\A.XLSX'], {
+    allowedExtensions: EXCEL_EXTENSIONS,
+  })
+  assert.equal(result.ok, true, '重复不阻塞')
+  assert.equal(result.needsConfirm, true)
+  assert.deepEqual(codes(result), ['files.duplicated'])
+  assert.match(result.message, /重复选择/)
+})
+
+test('test_task_101_dispatch_guard_selected_files_block_wins_over_confirm', () => {
+  // 同时命中重复(confirm)与非法扩展名(block)时，只展示 block 文案
+  const result = checkSelectedFiles(['a.txt', 'a.txt'], { allowedExtensions: EXCEL_EXTENSIONS })
+  assert.equal(result.ok, false)
+  assert.equal(result.needsConfirm, false)
+  assert.match(result.message, /不支持/)
+  assert.ok(!result.message.includes('重复选择'))
+})
+
+// ------------------------------------------------------------ 解析结果校验
+
+const parseVo = (over: Record<string, unknown> = {}) => ({
+  taskId: 12,
+  totalRows: 100,
+  acceptedRows: 100,
+  droppedRows: 0,
+  groupCount: 8,
+  ...over,
+})
+
+test('test_task_101_dispatch_guard_normal_parse_result_pass', () => {
+  const result = checkParseResult(parseVo())
+  assert.equal(result.ok, true)
+  assert.equal(result.needsConfirm, false)
+  assert.deepEqual(codes(result), [])
+})
+
+test('test_task_101_dispatch_guard_normal_parse_result_missing_optional_counts', () => {
+  // collect-data 的 Vo 里 totalRows/droppedRows/groupCount 都是可选的
+  const result = checkParseResult({ taskId: 3, acceptedRows: 20 })
+  assert.equal(result.ok, true)
+  assert.equal(result.needsConfirm, false)
+})
+
+test('test_task_101_dispatch_guard_boundary_parse_result_single_row', () => {
+  const result = checkParseResult(parseVo({ totalRows: 1, acceptedRows: 1, droppedRows: 0 }))
+  assert.equal(result.ok, true)
+})
+
+test('test_task_101_dispatch_guard_boundary_parse_result_zero_rows_blocked', () => {
+  // 这是最危险的一种：任务建好了但没有明细，推给 Python 会一直停在 RUNNING
+  const allDropped = checkParseResult(parseVo({ totalRows: 500, acceptedRows: 0, droppedRows: 500 }))
+  assert.equal(allDropped.ok, false)
+  assert.deepEqual(codes(allDropped), ['parse.all-dropped'])
+  assert.match(allDropped.message, /共读取 500 行/)
+  assert.match(allDropped.message, /卡在执行中/)
+
+  const emptyFile = checkParseResult(parseVo({ totalRows: 0, acceptedRows: 0, droppedRows: 0 }))
+  assert.equal(emptyFile.ok, false)
+  assert.deepEqual(codes(emptyFile), ['parse.empty-file'])
+  assert.match(emptyFile.message, /没有读到任何数据行/)
+})
+
+test('test_task_101_dispatch_guard_parse_result_zero_rows_allowed_when_not_required', () => {
+  const result = checkParseResult(parseVo({ totalRows: 0, acceptedRows: 0 }), { requireRows: false })
+  assert.equal(result.ok, true)
+})
+
+test('test_task_101_dispatch_guard_confirm_parse_result_partial_dropped', () => {
+  const result = checkParseResult(parseVo({ totalRows: 100, acceptedRows: 88, droppedRows: 12 }), {
+    requiredColumnsHint: 'ASIN / 国家',
+  })
+  assert.equal(result.ok, true, '还有 88 行可跑，不该硬拦')
+  assert.equal(result.needsConfirm, true)
+  assert.deepEqual(codes(result), ['parse.partial-dropped'])
+  assert.match(result.message, /12 行/)
+  assert.match(result.message, /只有 88 行会被执行/)
+  assert.match(result.message, /ASIN \/ 国家/)
+  assert.equal(result.title, '解析结果需要确认')
+})
+
+test('test_task_101_dispatch_guard_parse_result_require_groups', () => {
+  const noGroup = checkParseResult(parseVo({ groupCount: 0 }), { requireGroups: true })
+  assert.equal(noGroup.ok, false)
+  assert.deepEqual(codes(noGroup), ['parse.no-group'])
+
+  const ignored = checkParseResult(parseVo({ groupCount: 0 }))
+  assert.equal(ignored.ok, true, '没要求分组时 groupCount=0 不拦')
+})
+
+test('test_task_101_dispatch_guard_invalid_parse_result_bad_task_id', () => {
+  for (const taskId of [0, -1, null, undefined, NaN, '12', 1.5, Infinity]) {
+    const result = checkParseResult(parseVo({ taskId }))
+    assert.equal(result.ok, false, `taskId=${String(taskId)} 应被拦截`)
+    assert.deepEqual(codes(result), ['parse.bad-task-id'])
+  }
+})
+
+test('test_task_101_dispatch_guard_invalid_parse_result_not_object', () => {
+  for (const bad of [null, undefined, 'ok', 7, []]) {
+    const result = checkParseResult(bad)
+    assert.equal(result.ok, false, `${String(bad)} 应被拦截`)
+    assert.deepEqual(codes(result), ['parse.not-object'])
+  }
+})
+
+test('test_task_101_dispatch_guard_invalid_parse_result_bad_counts', () => {
+  const result = checkParseResult(parseVo({ acceptedRows: NaN, totalRows: -3 }))
+  assert.equal(result.ok, false)
+  assert.deepEqual(codes(result), ['parse.bad-count', 'parse.bad-count'])
+  assert.match(result.message, /totalRows/)
+  assert.match(result.message, /acceptedRows/)
+})
+
+test('test_task_101_dispatch_guard_parse_result_does_not_mutate_input', () => {
+  const input = parseVo({ totalRows: 10, acceptedRows: 6, droppedRows: 4 })
+  const snapshot = JSON.parse(JSON.stringify(input))
+  checkParseResult(input, { requiredColumnsHint: 'ASIN' })
+  assert.deepEqual(input, snapshot)
+})
+
+// ------------------------------------------------------------ 入队 payload
+
+const runPayload = (over: Record<string, unknown> = {}) => ({
+  type: 'similar-asin-run',
+  ts: 1700000000000,
+  data: {
+    taskId: 12,
+    user_id: 3,
+    api_key: 'sk-xxx',
+    acceptedRows: 88,
+    ...over,
+  },
+})
+
+test('test_task_101_dispatch_guard_normal_queue_payload_pass', () => {
+  const result = checkQueuePayload(runPayload(), {
+    expectedType: 'similar-asin-run',
+    requiredDataKeys: ['taskId', 'api_key'],
+  })
+  assert.equal(result.ok, true)
+  assert.deepEqual(codes(result), [])
+})
+
+test('test_task_101_dispatch_guard_normal_queue_payload_optional_undefined_is_fine', () => {
+  // payload 里到处是 `taskNo: vo?.taskNo`，undefined 可选字段不能被误拦
+  const result = checkQueuePayload(runPayload({ taskNo: undefined, note: undefined }), {
+    requiredDataKeys: ['taskId'],
+  })
+  assert.equal(result.ok, true)
+  assert.deepEqual(codes(result), [])
+})
+
+test('test_task_101_dispatch_guard_boundary_queue_payload_empty_collections', () => {
+  const emptyArray = checkQueuePayload(runPayload({ items: [] }), { nonEmptyArrayKeys: ['items'] })
+  assert.equal(emptyArray.ok, false)
+  assert.deepEqual(codes(emptyArray), ['payload.empty-array'])
+  assert.match(emptyArray.message, /没得可做/)
+
+  const oneItem = checkQueuePayload(runPayload({ items: [{ asin: 'B001' }] }), {
+    nonEmptyArrayKeys: ['items'],
+  })
+  assert.equal(oneItem.ok, true, '1 条也算有内容')
+
+  const emptyMap = checkQueuePayload(runPayload({ asin_rows_by_country: {} }), {
+    nonEmptyObjectKeys: ['asin_rows_by_country'],
+  })
+  assert.equal(emptyMap.ok, false)
+  assert.deepEqual(codes(emptyMap), ['payload.empty-object'])
+
+  const filledMap = checkQueuePayload(runPayload({ asin_rows_by_country: { DE: [{ asin: 'B1' }] } }), {
+    nonEmptyObjectKeys: ['asin_rows_by_country'],
+  })
+  assert.equal(filledMap.ok, true)
+})
+
+test('test_task_101_dispatch_guard_boundary_queue_payload_positive_numbers', () => {
+  // 0 行 / 0 页不是 null，requiredDataKeys 拦不住，但 Python 端会翻 0 页后空转
+  const zero = checkQueuePayload(runPayload({ totalRows: 0, totalPages: 0 }), {
+    positiveNumberKeys: ['totalRows', 'totalPages'],
+  })
+  assert.equal(zero.ok, false)
+  assert.deepEqual(codes(zero), ['payload.non-positive'])
+  assert.match(zero.message, /totalRows=0/)
+  assert.match(zero.message, /totalPages=0/)
+
+  const one = checkQueuePayload(runPayload({ totalRows: 1, totalPages: 1 }), {
+    positiveNumberKeys: ['totalRows', 'totalPages'],
+  })
+  assert.equal(one.ok, true, '1 行 1 页是合法下界')
+
+  const missing = checkQueuePayload(runPayload(), { positiveNumberKeys: ['totalRows'] })
+  assert.equal(missing.ok, false, '字段缺失同样算不可执行')
+
+  const negative = checkQueuePayload(runPayload({ totalRows: -5 }), {
+    positiveNumberKeys: ['totalRows'],
+  })
+  assert.equal(negative.ok, false)
+})
+
+test('test_task_101_dispatch_guard_invalid_queue_payload_missing_required', () => {
+  const result = checkQueuePayload(runPayload({ api_key: '   ', taskId: null }), {
+    requiredDataKeys: ['taskId', 'api_key', 'shop_name'],
+  })
+  assert.equal(result.ok, false)
+  assert.deepEqual(codes(result), ['payload.missing-field'])
+  assert.match(result.message, /taskId、api_key、shop_name/)
+})
+
+test('test_task_101_dispatch_guard_invalid_queue_payload_shape', () => {
+  const notObject = checkQueuePayload('{"type":"x"}')
+  assert.equal(notObject.ok, false)
+  assert.deepEqual(codes(notObject), ['payload.not-object'])
+
+  const noType = checkQueuePayload({ data: { taskId: 1 } })
+  assert.equal(noType.ok, false)
+  assert.ok(codes(noType).includes('payload.bad-type'))
+
+  const wrongType = checkQueuePayload(runPayload(), { expectedType: 'publish-run' })
+  assert.equal(wrongType.ok, false)
+  assert.ok(codes(wrongType).includes('payload.type-mismatch'))
+
+  const noData = checkQueuePayload({ type: 'x-run', data: null })
+  assert.equal(noData.ok, false)
+  assert.ok(codes(noData).includes('payload.bad-data'))
+})
+
+test('test_task_101_dispatch_guard_invalid_queue_payload_unsafe_json', () => {
+  // NaN 会被 JSON.stringify 静默改写成 null，Python 侧拿到 None 后空转
+  const nan = checkQueuePayload(runPayload({ minPrice: NaN }))
+  assert.equal(nan.ok, false)
+  assert.deepEqual(codes(nan), ['payload.unsafe-json'])
+  assert.match(nan.message, /payload\.data\.minPrice/)
+  assert.match(nan.message, /NaN 会被序列化成 null/)
+
+  const infinite = checkQueuePayload(runPayload({ rounds: Infinity }))
+  assert.equal(infinite.ok, false)
+  assert.match(infinite.message, /payload\.data\.rounds/)
+})
+
+test('test_task_101_dispatch_guard_invalid_queue_payload_circular_reference', () => {
+  const payload = runPayload() as Record<string, unknown>
+  const data = payload.data as Record<string, unknown>
+  data.self = data
+  const result = checkQueuePayload(payload)
+  assert.equal(result.ok, false)
+  assert.deepEqual(codes(result), ['payload.unsafe-json'])
+  assert.match(result.message, /循环引用/)
+  // 校验本身不能抛错，也不能改动输入
+  assert.equal(data.self, data)
+})
+
+// ------------------------------------------------- findUnsafeJsonPaths 细节
+
+test('test_task_101_dispatch_guard_unsafe_json_normal_clean_object', () => {
+  assert.deepEqual(findUnsafeJsonPaths({ a: 1, b: 'x', c: true, d: null, e: [1, 2], f: {} }), [])
+  assert.deepEqual(findUnsafeJsonPaths({ when: new Date(0) }), [], '有效 Date 可安全序列化')
+})
+
+test('test_task_101_dispatch_guard_unsafe_json_boundary_undefined_placement', () => {
+  // 对象属性 undefined = 可选字段，放行；数组元素 undefined 会变 null，报告
+  assert.deepEqual(findUnsafeJsonPaths({ optional: undefined }), [])
+  const inArray = findUnsafeJsonPaths({ items: [1, undefined, 3] })
+  assert.equal(inArray.length, 1)
+  assert.equal(inArray[0].path, 'payload.items[1]')
+
+  const holes = findUnsafeJsonPaths({ items: [1, , 3] })
+  assert.equal(holes.length, 1)
+  assert.match(holes[0].reason, /空洞/)
+})
+
+test('test_task_101_dispatch_guard_unsafe_json_invalid_types', () => {
+  const found = findUnsafeJsonPaths({
+    fn: () => 1,
+    sym: Symbol('s'),
+    big: BigInt(9),
+    map: new Map([['a', 1]]),
+    set: new Set([1]),
+    badDate: new Date('nope'),
+  })
+  const byPath = Object.fromEntries(found.map((item) => [item.path, item.reason]))
+  assert.match(byPath['payload.fn'], /函数/)
+  assert.match(byPath['payload.sym'], /Symbol/)
+  assert.match(byPath['payload.big'], /BigInt/)
+  assert.match(byPath['payload.map'], /Map/)
+  assert.match(byPath['payload.set'], /Set/)
+  assert.match(byPath['payload.badDate'], /无效日期/)
+})
+
+test('test_task_101_dispatch_guard_unsafe_json_boundary_deep_nesting', () => {
+  let deep: Record<string, unknown> = { leaf: 1 }
+  for (let i = 0; i < 70; i += 1) deep = { next: deep }
+  const found = findUnsafeJsonPaths(deep)
+  assert.ok(found.length > 0)
+  assert.match(found[0].reason, /嵌套层级超过/)
+})
+
+test('test_task_101_dispatch_guard_unsafe_json_repeated_reference_is_not_circular', () => {
+  // 同一个对象被两个 key 引用（DAG）不是环，不该误报
+  const shared = { asin: 'B001' }
+  assert.deepEqual(findUnsafeJsonPaths({ a: shared, b: shared }), [])
+  assert.deepEqual(findUnsafeJsonPaths({ list: [shared, shared] }), [])
+})
+
+// ----------------------------------------------------------------- 其他
+
+test('test_task_101_dispatch_guard_passed_helper_is_inert', () => {
+  const result = guardPassed()
+  assert.equal(result.ok, true)
+  assert.equal(result.needsConfirm, false)
+  assert.equal(result.message, '')
+  assert.deepEqual(result.issues, [])
+})
+
+test('test_task_101_dispatch_guard_repeated_calls_are_idempotent', () => {
+  const files = ['a.xlsx', 'b.xlsx']
+  assert.deepEqual(checkSelectedFiles(files), checkSelectedFiles(files))
+  const vo = parseVo({ droppedRows: 5, acceptedRows: 95 })
+  assert.deepEqual(checkParseResult(vo), checkParseResult(vo))
+  const payload = runPayload()
+  assert.deepEqual(checkQueuePayload(payload), checkQueuePayload(payload))
+})
+
+test('test_task_101_dispatch_guard_dependency_failure_does_not_throw', () => {
+  // Proxy getter 故障时校验不应把异常抛给调用方之外的路径；这里确认异常可被捕获
+  const poisoned = new Proxy(
+    { taskId: 1, totalRows: 5, acceptedRows: 5 },
+    {
+      get(target, prop, receiver) {
+        if (prop === 'acceptedRows') throw new Error('getter down')
+        return Reflect.get(target, prop, receiver)
+      },
+    },
+  )
+  assert.throws(() => checkParseResult(poisoned), /getter down/)
+  // 修好之后同一入口可以继续用，说明模块没有内部状态残留
+  assert.equal(checkParseResult({ taskId: 1, totalRows: 5, acceptedRows: 5 }).ok, true)
+})