fix: 完善数据预处理与 JSON 上传链路

2026-07-30 16:53:54 +08:00
parent f917a025e1
commit b975de02da
25 changed files with 3277 additions and 419 deletions
--- a/frontend/src/views/data-process/DataProcessCreateView.vue
+++ b/frontend/src/views/data-process/DataProcessCreateView.vue
@@ -10,7 +10,7 @@ import SourceUploadStep from './create/SourceUploadStep.vue'
 import PreviewCompareStep from './create/PreviewCompareStep.vue'
 import GenerationStep from './create/GenerationStep.vue'
 import ResultEditorStep from './create/ResultEditorStep.vue'
-import { DEFAULT_SOURCE_TEXT, estimateTokenCount } from './create/previewModel'
+import { DEFAULT_SOURCE_TEXT, estimateTokenCount, isManualPreviewItem } from './create/previewModel'
 import {
  createDefaultStructuredOptions,
  createDefaultUnstructuredOptions,
@@ -21,6 +21,7 @@ import { useDataProcessGeneration } from './create/useDataProcessGeneration'
 import { useDataProcessPreviewBuild } from './create/useDataProcessPreviewBuild'
 import { useDataProcessRegeneration } from './create/useDataProcessRegeneration'
 import {
+  loadCanonicalSourceContent,
  mapDataProcessSourceFile,
  useDataProcessSourceUpload,
  validateSourceFileSelection,
@@ -33,7 +34,6 @@ import {
  deleteDataProcessPreview,
  deleteDataProcessSourceFile,
  getDataProcessPreview,
-  getDataProcessSourceContent,
  pullDataProcessExternalSource,
  testDataProcessExternalSource,
  updateDataProcessPreview,
@@ -116,7 +116,9 @@ const modelSubmitLoading = ref(false)
 let allowLeave = false
 const {
  bulkRegeneration,
+  canReturnFromGeneration,
  generation,
+  generationStarting,
  regeneratingResultId,
  resultRegenerationBusy,
  results,
@@ -189,7 +191,6 @@ const primaryActionIcon = computed(() => {
  if (currentStepId.value === 'generate' && generation.status !== 'success') return 'fa-play'
  return 'fa-arrow-right'
 })
-
 const previousStepLabel = computed(() => currentStep.value > 0
  ? WIZARD_STEPS[currentStep.value - 1].title
  : '')
@@ -290,21 +291,26 @@ function externalPayload(): DataProcessExternalSourcePayload {
 }

 function mapPreviewItem(item: DataProcessPreviewItem): PreviewItem {
+  const sourceLocator = item.quality_score?.source_locator
  return {
    id: String(item.id),
    sourceFileId: String(item.source_file_id),
    originalContent: item.original_content,
    editedContent: item.edited_content,
    savedEditedContent: item.edited_content,
-    sourceStart: item.source_start,
-    sourceEnd: item.source_end,
-    sourceStartLine: item.source_start_line,
-    sourceEndLine: item.source_end_line,
+    sourceStart: item.source_start ?? sourceLocator?.source_start ?? null,
+    sourceEnd: item.source_end ?? sourceLocator?.source_end ?? null,
+    sourceStartLine: item.source_start_line ?? sourceLocator?.start_line ?? null,
+    sourceEndLine: item.source_end_line ?? sourceLocator?.end_line ?? null,
    tokenCount: item.token_count,
    status: item.status,
    sourcePages: Array.isArray(item.quality_score?.source_pages)
      ? item.quality_score.source_pages.filter((value): value is number => typeof value === 'number')
      : [],
+    sourceLocator,
+    headingPath: Array.isArray(item.quality_score?.heading_path)
+      ? item.quality_score.heading_path.filter((value): value is string => typeof value === 'string')
+      : [],
    updatedAt: item.updated_at,
  }
 }
@@ -419,7 +425,6 @@ function handleFileChange(uploadFile: UploadFile) {
  const localUid = `local-${uploadFile.uid}-${Date.now()}-${uploadedFiles.value.length}`
  uploadedFiles.value.push({
    uid: localUid,
-    rawFile: raw,
    name: raw.name,
    size: raw.size,
    count: 0,
@@ -431,7 +436,7 @@ function handleFileChange(uploadFile: UploadFile) {
    previewProgress: 0,
  })
  dirty.value = true
-  enqueueSourceUpload({ uid: localUid, file: raw, extension: validation.extension })
+  enqueueSourceUpload({ uid: localUid, file: raw })
 }

 async function useSampleFile() {
@@ -488,11 +493,8 @@ async function handlePullData() {
    const response = await pullDataProcessExternalSource(taskId.value, externalPayload())
    const newFiles: UploadedDataFile[] = []
    for (const file of response.files) {
-      const source = await getDataProcessSourceContent(taskId.value, file.id, {
-        start_line: 1,
-        line_count: 5000,
-      })
-      newFiles.push(mapDataProcessSourceFile(file, source.content))
+      const content = await loadCanonicalSourceContent(taskId.value, file.id)
+      newFiles.push(mapDataProcessSourceFile(file, content))
    }
    uploadedFiles.value.push(...newFiles)
    externalConnected.value = true
@@ -734,9 +736,14 @@ function selectPreviewItem(id: string) {
 function updatePreviewContent(id: string, value: string) {
  const item = previewItems.value.find((entry) => entry.id === id)
  if (!item) return
+  const isManual = isManualPreviewItem(item)
  item.editedContent = value
  item.tokenCount = estimateTokenCount(value)
-  item.status = value === item.originalContent ? 'original' : item.sourceStart == null ? 'manual' : 'modified'
+  item.status = !value.trim()
+    ? 'invalid'
+    : value === item.originalContent
+      ? 'original'
+      : isManual ? 'manual' : 'modified'
  resetDownstream()
  dirty.value = true
 }
@@ -758,7 +765,7 @@ async function syncPreviewChanges() {

 function restorePreviewItem(id: string) {
  const item = previewItems.value.find((entry) => entry.id === id)
-  if (!item || item.sourceStart == null) return
+  if (!item || isManualPreviewItem(item)) return
  item.editedContent = item.originalContent
  item.tokenCount = estimateTokenCount(item.originalContent)
  item.status = 'original'
@@ -897,7 +904,7 @@ async function handleBack() {
    ElMessage.warning('请等待当前文件切分完成')
    return
  }
-  if (currentStepId.value === 'generate') return
+  if (currentStepId.value === 'generate' && !canReturnFromGeneration.value) return
  if (currentStep.value > 0) {
    const targetStep = WIZARD_STEPS[currentStep.value - 1]?.id
    if (!targetStep) return
@@ -1014,8 +1021,13 @@ async function initializeExistingWorkflow() {
  if (sourceTask.status === 'running') resumeStep = 'generate'
  if (resumeStep === 'preview' && !previewItems.value.length) resumeStep = 'upload'
  if (resumeStep === 'results' && sourceTask.status !== 'completed') resumeStep = 'generate'
+  if (resumeStep === 'generate' || resumeStep === 'results') {
+    const resume = resumeGeneration()
+    goToStep(resumeStep)
+    await resume
+    return
+  }
  goToStep(resumeStep)
-  if (resumeStep === 'generate' || resumeStep === 'results') await resumeGeneration()
 }

 onBeforeUnmount(() => {
@@ -1154,7 +1166,7 @@ onMounted(() => {
      <div class="footer-left">
        <el-button
          v-if="currentStep > 0"
-          :disabled="currentStepId === 'generate' || previewBuilding || sourceUploading"
+          :disabled="(currentStepId === 'generate' && !canReturnFromGeneration) || previewBuilding || sourceUploading"
          @click="handleBack"
        >
          <i class="fa fa-arrow-left" style="margin-right: 6px;" /> 返回：{{ previousStepLabel }}
@@ -1167,8 +1179,8 @@ onMounted(() => {
        <el-button
          class="wizard-primary-action"
          type="primary"
-          :loading="modelSubmitLoading || generation.status === 'running' || resultRegenerationBusy || (currentStepId === 'upload' && (sourceUploading || previewBuilding))"
-          :disabled="hydrating || modelSubmitLoading || Boolean(initializationError) || resultRegenerationBusy || (currentStepId === 'generate' && generation.status === 'running') || previewBuilding || sourceUploading || (currentStepId === 'upload' && hasUnfinishedUploads)"
+          :loading="modelSubmitLoading || generationStarting || generation.status === 'running' || resultRegenerationBusy || (currentStepId === 'upload' && (sourceUploading || previewBuilding))"
+          :disabled="hydrating || modelSubmitLoading || generationStarting || Boolean(initializationError) || resultRegenerationBusy || (currentStepId === 'generate' && generation.status === 'running') || previewBuilding || sourceUploading || (currentStepId === 'upload' && hasUnfinishedUploads)"
          @click="handlePrimaryAction"
        >
          {{ primaryActionLabel }} <i class="fa" :class="primaryActionIcon" style="margin-left: 6px;" />
--- a/frontend/src/views/data-process/DataProcessDetailView.vue
+++ b/frontend/src/views/data-process/DataProcessDetailView.vue
@@ -9,6 +9,7 @@ import {
  getDataProcessResults,
  getDataProcessTask,
  publishDataProcess,
+  repeatDataProcessTask,
  restoreDataProcessResult,
  updateDataProcessResult,
 } from '@/api/modules/dataProcess'
@@ -42,6 +43,8 @@ const savingResult = ref(false)
 const restoringResultId = ref<string | number | null>(null)
 const publishDialogVisible = ref(false)
 const publishing = ref(false)
+const repeatGenerating = ref(false)
+const repeatRequestId = ref('')
 const configExpanded = ref(false)
 const resultCellTooltipOptions = {
  popperClass: 'data-process-result-tooltip',
@@ -113,6 +116,51 @@ const preprocessOptionLabelMap: Record<string, string> = {
  preserve_context: '保留上下文',
 }

+const structuredPreprocessOptionKeys = new Set([
+  'clean_invalid',
+  'deduplicate',
+  'detect_structure',
+  'normalize_format',
+  'desensitize',
+  'filter_anomaly',
+])
+
+function formatStructuredPreprocessOptions(value: unknown[]) {
+  const options = [...new Set(value.map((item) => String(item)))]
+  const selected = new Set(options)
+  const consumed = new Set<string>()
+  const labels: string[] = []
+
+  function appendGroup(values: string[], groupLabel: string) {
+    const selectedValues = values.filter((item) => selected.has(item))
+    selectedValues.forEach((item) => consumed.add(item))
+    if (selectedValues.length === values.length) {
+      labels.push(groupLabel)
+      return
+    }
+    selectedValues.forEach((item) => {
+      labels.push(`${preprocessOptionLabelMap[item] || item}（历史部分配置）`)
+    })
+  }
+
+  appendGroup(['clean_invalid', 'deduplicate'], '数据清洗')
+  appendGroup(['detect_structure', 'normalize_format'], '结构标准化')
+
+  if (selected.has('desensitize')) {
+    consumed.add('desensitize')
+    labels.push('敏感信息脱敏')
+  }
+  if (selected.has('filter_anomaly')) {
+    consumed.add('filter_anomaly')
+    labels.push('异常数据过滤（历史规则）')
+  }
+
+  options.forEach((item) => {
+    if (!consumed.has(item)) labels.push(preprocessOptionLabelMap[item] || item)
+  })
+  return labels.length ? labels.join('、') : '-'
+}
+
 function numeric(value: unknown) {
  const parsed = typeof value === 'number' ? value : Number(value)
  return Number.isFinite(parsed) ? parsed : 0
@@ -199,6 +247,11 @@ const canRegenerate = computed(() => {
    || status === 'stopped'
    || (status === 'completed' && (Boolean(outputDatasetId.value) || hasPublishedOutputs.value))
 })
+const canRepeatGeneration = computed(() => (
+  detail.value?.status === 'completed'
+  && detail.value.results_confirmed !== false
+  && previewCount.value > 0
+))
 const creatorName = computed(() => detail.value?.creator_name || detail.value?.creator || '-')
 const createTime = computed(() => detail.value?.create_time || detail.value?.created_at)
 const startTime = computed(() => detail.value?.start_time || detail.value?.started_at)
@@ -263,9 +316,14 @@ function formatConfigValue(key: string, value: unknown) {
  }
  if (Array.isArray(value)) {
    if (key === 'preprocess_options') {
-      return value.length
-        ? value.map((item) => preprocessOptionLabelMap[String(item)] || String(item)).join('、')
-        : '-'
+      const containsStructuredOption = value.some((item) => (
+        structuredPreprocessOptionKeys.has(String(item))
+      ))
+      return containsStructuredOption
+        ? formatStructuredPreprocessOptions(value)
+        : value.length
+          ? value.map((item) => preprocessOptionLabelMap[String(item)] || String(item)).join('、')
+          : '-'
    }
    return value.length ? value.join('、') : '-'
  }
@@ -503,6 +561,48 @@ function startRegeneration() {
  void router.push({ name: 'data-process-regenerate', params: { id: taskId.value } })
 }

+function createRepeatRequestId() {
+  if (typeof globalThis.crypto?.randomUUID === 'function') {
+    return globalThis.crypto.randomUUID()
+  }
+  return `${Date.now()}_${Math.random().toString(36).slice(2, 14)}`
+}
+
+async function repeatGeneration() {
+  if (!detail.value?.updated_at || repeatGenerating.value) return
+  try {
+    await ElMessageBox.confirm(
+      '系统会复制当前配置、源文件和切分结果，创建一个独立的新任务并在后台生成。原任务和原结果不会被修改。',
+      '按原配置再生成一批？',
+      {
+        confirmButtonText: '创建并开始生成',
+        cancelButtonText: '取消',
+        type: 'info',
+      },
+    )
+  } catch {
+    return
+  }
+
+  repeatGenerating.value = true
+  repeatRequestId.value ||= createRepeatRequestId()
+  try {
+    const repeated = await repeatDataProcessTask(taskId.value, {
+      expected_updated_at: detail.value.updated_at,
+      request_id: repeatRequestId.value,
+    })
+    ElMessage.success(repeated.created ? '已创建新任务，正在后台生成' : '已恢复此前创建的新任务')
+    await router.push({
+      name: 'data-process-workflow',
+      params: { id: repeated.task.id },
+    })
+  } catch {
+    // 保留幂等请求 ID；网络超时后再次点击不会重复创建任务。
+  } finally {
+    repeatGenerating.value = false
+  }
+}
+
 watch([currentPage, pageSize], () => void loadResults())

 onMounted(loadPage)
@@ -520,22 +620,32 @@ onBeforeUnmount(() => {
          <el-tag :type="displayStatus.type" size="small" effect="light">
            {{ displayStatus.label }}
          </el-tag>
-          <el-button
-            v-if="detail.status === 'completed' && !hasCurrentPublishedDataset"
-            class="publish-button"
-            type="primary"
-            @click="openPublishDialog"
-          >
-            <i class="fa fa-database" style="margin-right: 4px;" />发布为三个数据集
-          </el-button>
-          <el-button
-            v-if="canRegenerate"
-            class="publish-button"
-            type="primary"
-            @click="startRegeneration"
-          >
-            <i class="fa fa-refresh" style="margin-right: 4px;" />重新生成
-          </el-button>
+          <div class="heading-actions">
+            <el-button
+              v-if="detail.status === 'completed' && !hasCurrentPublishedDataset"
+              type="primary"
+              @click="openPublishDialog"
+            >
+              <i class="fa fa-database" style="margin-right: 4px;" />发布为三个数据集
+            </el-button>
+            <el-button
+              v-if="canRepeatGeneration"
+              type="primary"
+              :loading="repeatGenerating"
+              :disabled="repeatGenerating"
+              @click="repeatGeneration"
+            >
+              <i class="fa fa-clone" style="margin-right: 4px;" />按原配置再生成一批
+            </el-button>
+            <el-button
+              v-if="canRegenerate"
+              type="warning"
+              plain
+              @click="startRegeneration"
+            >
+              <i class="fa fa-refresh" style="margin-right: 4px;" />覆盖当前任务重新生成
+            </el-button>
+          </div>
        </div>
        <p>{{ detail.description || '暂无任务描述' }}</p>
        <dl class="heading-meta">
@@ -804,7 +914,15 @@ onBeforeUnmount(() => {
  > p { margin: 8px 0 0; color: #64748b; font-size: 13px; }
 }

-.publish-button { margin-left: auto; }
+.heading-actions {
+  margin-left: auto;
+  display: flex;
+  flex-wrap: wrap;
+  justify-content: flex-end;
+  gap: 8px;
+
+  :deep(.el-button + .el-button) { margin-left: 0; }
+}
 .load-state-actions { display: flex; gap: 10px; }
 .compact-empty { padding: 28px 18px; color: #94a3b8; font-size: 13px; text-align: center; }
 .publish-form-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
@@ -968,7 +1086,8 @@ onBeforeUnmount(() => {
@media (max-width: 720px) {
  .metric-grid, .config-grid { grid-template-columns: 1fr; }
  .detail-heading .heading-row { align-items: flex-start; flex-wrap: wrap; }
-  .publish-button { width: 100%; margin-left: 0; }
+  .heading-actions { width: 100%; margin-left: 0; }
+  .heading-actions :deep(.el-button) { width: 100%; }
  .publish-form-grid { grid-template-columns: 1fr; gap: 0; }
  .result-toolbar { align-items: stretch; flex-direction: column; }
  .result-filters { padding: 0 16px 16px; flex-direction: column; }
--- a/frontend/src/views/data-process/create/OfficeSourceViewer.vue
+++ b/frontend/src/views/data-process/create/OfficeSourceViewer.vue
@@ -46,6 +46,13 @@ const sourceUrl = computed(() => (
    ? getDataProcessSourceRawUrl(props.taskId, props.sourceFileId)
    : ''
 ))
+const selectedXlsxLocator = computed(() => {
+  const locator = props.selectedItem?.sourceLocator
+  if (!locator) return null
+  const hasSheet = locator.sheet_index != null || Boolean(locator.sheet_name)
+  const hasRow = locator.row_number != null || locator.sheet_record_index != null
+  return hasSheet && hasRow ? locator : null
+})
 const visibleRowRange = computed(() => {
  const sheet = xlsxPreview.value?.active_sheet
  if (!sheet || !sheet.rows.length) return '当前工作表没有可预览记录'
@@ -95,6 +102,16 @@ const selectedRecordKey = computed(() => {
 })

 function xlsxRowHighlighted(row: DataProcessXlsxPreviewRow) {
+  const locator = selectedXlsxLocator.value
+  const sheet = xlsxPreview.value?.active_sheet
+  if (locator && sheet) {
+    const sheetMatches = locator.sheet_index != null
+      ? sheet.index === locator.sheet_index
+      : sheet.name === locator.sheet_name
+    if (!sheetMatches) return false
+    if (locator.row_number != null) return row.row_number === locator.row_number
+    return row.record_index === locator.sheet_record_index
+  }
  return Boolean(selectedRecordKey.value && recordKey(row.record) === selectedRecordKey.value)
 }

@@ -119,8 +136,11 @@ async function locateSelectedItem() {
 async function loadPreview(options: { reset?: boolean } = {}) {
  const sequence = ++loadSequence
  if (options.reset) {
-    activeSheetIndex.value = 0
-    pageOffset.value = 0
+    const locator = selectedXlsxLocator.value
+    activeSheetIndex.value = locator?.sheet_index ?? 0
+    pageOffset.value = locator?.sheet_record_index == null
+      ? 0
+      : Math.floor(locator.sheet_record_index / XLSX_PAGE_SIZE) * XLSX_PAGE_SIZE
    preview.value = null
  }
  errorMessage.value = ''
@@ -178,8 +198,34 @@ watch(
 )

 watch(
-  () => props.selectedItem?.id,
-  () => void locateSelectedItem(),
+  () => [
+    props.selectedItem?.id,
+    props.selectedItem?.sourceLocator?.sheet_index,
+    props.selectedItem?.sourceLocator?.sheet_record_index,
+    props.selectedItem?.sourceLocator?.row_number,
+  ],
+  () => {
+    const locator = selectedXlsxLocator.value
+    if (!locator || isDocx.value) {
+      void locateSelectedItem()
+      return
+    }
+    const targetSheet = locator.sheet_index ?? activeSheetIndex.value
+    const targetOffset = locator.sheet_record_index == null
+      ? pageOffset.value
+      : Math.floor(locator.sheet_record_index / XLSX_PAGE_SIZE) * XLSX_PAGE_SIZE
+    const activeSheet = xlsxPreview.value?.active_sheet
+    if (
+      activeSheet?.index === targetSheet
+      && activeSheet.offset === targetOffset
+    ) {
+      void locateSelectedItem()
+      return
+    }
+    activeSheetIndex.value = targetSheet
+    pageOffset.value = targetOffset
+    void loadPreview()
+  },
 )
 </script>

@@ -301,6 +347,8 @@ watch(
              :key="row.row_number"
              class="xlsx-row"
              :class="{ 'is-highlighted': xlsxRowHighlighted(row) }"
+              :data-row-number="row.row_number"
+              :data-record-index="row.record_index"
            >
              <th class="row-number-cell">{{ row.row_number }}</th>
              <td
--- a/frontend/src/views/data-process/create/PreviewCompareStep.vue
+++ b/frontend/src/views/data-process/create/PreviewCompareStep.vue
@@ -2,7 +2,11 @@
 import { computed, nextTick, ref, watch } from 'vue'
 import OfficeSourceViewer from './OfficeSourceViewer.vue'
 import PdfSourceViewer from './PdfSourceViewer.vue'
-import { sourceLines } from './previewModel'
+import {
+  isManualPreviewItem,
+  sourceLineNumberAtOffset,
+  sourceLineWindow,
+} from './previewModel'
 import type { PreviewItem, ProcessType } from './types'

 const props = defineProps<{
@@ -31,9 +35,11 @@ const sourceViewerRef = ref<HTMLElement | null>(null)
 const search = ref('')
 const currentPage = ref(1)
 const PREVIEW_PAGE_SIZE = 10
+const SOURCE_LINE_RENDER_LIMIT = 240
+const SOURCE_LINE_CHARACTER_LIMIT = 4_000
+const sourceWindowStartLine = ref(1)
 const editingItemId = ref<string | null>(null)
 const editorDraft = ref('')
-const lines = computed(() => sourceLines(props.sourceText))
 const selectedItem = computed(() => props.items.find((item) => item.id === props.selectedId) ?? props.items[0])
 const editingItem = computed(() => props.items.find((item) => item.id === editingItemId.value))
 const normalizedFileFormat = computed(() => (
@@ -43,6 +49,27 @@ const normalizedFileFormat = computed(() => (
 ))
 const isPdfSource = computed(() => normalizedFileFormat.value === 'pdf')
 const isOfficeSource = computed(() => ['docx', 'xlsx'].includes(normalizedFileFormat.value))
+const selectedSourceOffset = computed(() => {
+  const item = selectedItem.value
+  return item ? sourceOffsetRange(item)?.start ?? null : null
+})
+const selectedSourceLine = computed(() => {
+  const item = selectedItem.value
+  if (!item) return null
+  return sourceLineRange(item)?.start
+    ?? (selectedSourceOffset.value == null
+      ? null
+      : sourceLineNumberAtOffset(props.sourceText, selectedSourceOffset.value))
+})
+const visibleSourceWindow = computed(() => sourceLineWindow(
+  props.sourceText,
+  sourceWindowStartLine.value,
+  SOURCE_LINE_RENDER_LIMIT,
+  SOURCE_LINE_CHARACTER_LIMIT,
+  selectedSourceLine.value,
+  selectedSourceOffset.value,
+))
+const lines = computed(() => visibleSourceWindow.value.lines)

 const filteredItems = computed(() => props.items.filter((item, index) => {
  const matchesSearch = !search.value.trim()
@@ -58,10 +85,27 @@ const pagedItems = computed(() => {

 const selectedIndex = computed(() => props.items.findIndex((item) => item.id === selectedItem.value?.id))

-function isLineHighlighted(lineStart: number, lineEnd: number) {
+function sourceLineRange(item: PreviewItem) {
+  const start = item.sourceLocator?.start_line ?? item.sourceStartLine
+  const end = item.sourceLocator?.end_line ?? item.sourceEndLine ?? start
+  return start == null ? null : { start, end: end ?? start }
+}
+
+function sourceOffsetRange(item: PreviewItem) {
+  const start = item.sourceLocator?.source_start ?? item.sourceStart
+  const end = item.sourceLocator?.source_end ?? item.sourceEnd ?? start
+  return start == null ? null : { start, end: Math.max(start, end ?? start) }
+}
+
+function isLineHighlighted(lineNumber: number, lineStart: number, lineEnd: number) {
  const item = selectedItem.value
-  if (!item || item.sourceStart == null || item.sourceEnd == null) return false
-  return lineEnd >= item.sourceStart && lineStart <= item.sourceEnd
+  if (!item) return false
+  const lineRange = sourceLineRange(item)
+  if (lineRange) return lineNumber >= lineRange.start && lineNumber <= lineRange.end
+  const offsetRange = sourceOffsetRange(item)
+  if (!offsetRange) return false
+  const effectiveEnd = Math.max(offsetRange.start + 1, offsetRange.end)
+  return lineEnd >= offsetRange.start && lineStart < effectiveEnd
 }

 function selectItem(id: string) {
@@ -107,34 +151,88 @@ watch(search, () => {

 watch(() => props.selectedFileId, closeEditor)

-watch(selectedItem, async (item) => {
+watch([selectedItem, () => props.sourceText], async ([item]) => {
  if (!item) return
  const visibleIndex = filteredItems.value.findIndex((entry) => entry.id === item.id)
  if (visibleIndex >= 0) {
    currentPage.value = Math.floor(visibleIndex / PREVIEW_PAGE_SIZE) + 1
  }

-  if (isPdfSource.value || isOfficeSource.value || item.sourceStart == null) return
+  if (isPdfSource.value || isOfficeSource.value) return
+  const itemLineRange = sourceLineRange(item)
+  const itemOffsetRange = sourceOffsetRange(item)
+  if (!itemLineRange && !itemOffsetRange) {
+    sourceWindowStartLine.value = 1
+    return
+  }
+  const targetLine = selectedSourceLine.value
+    ?? sourceLineNumberAtOffset(props.sourceText, itemOffsetRange?.start ?? 0)
+  sourceWindowStartLine.value = Math.max(1, targetLine - Math.floor(SOURCE_LINE_RENDER_LIMIT / 3))
  await nextTick()
-  const target = sourceViewerRef.value?.querySelector<HTMLElement>(`[data-source-start="${item.sourceStart}"]`)
+  const exactTarget = sourceViewerRef.value
+    ?.querySelector<HTMLElement>(`[data-line-number="${targetLine}"]`)
+  const target = exactTarget
    ?? sourceViewerRef.value?.querySelector<HTMLElement>('.source-line.is-highlighted')
  target?.scrollIntoView({ block: 'center', behavior: 'smooth' })
 }, { immediate: true })

+async function showPreviousSourceWindow() {
+  sourceWindowStartLine.value = Math.max(1, sourceWindowStartLine.value - SOURCE_LINE_RENDER_LIMIT)
+  await nextTick()
+  if (sourceViewerRef.value) sourceViewerRef.value.scrollTop = 0
+}
+
+async function showNextSourceWindow() {
+  if (!visibleSourceWindow.value.hasMore) return
+  sourceWindowStartLine.value = visibleSourceWindow.value.endLine + 1
+  await nextTick()
+  if (sourceViewerRef.value) sourceViewerRef.value.scrollTop = 0
+}
+
 function itemNumber(item: PreviewItem) {
  return props.items.findIndex((entry) => entry.id === item.id) + 1
 }

 function lineRange(item: PreviewItem) {
-  if (item.sourcePages?.length) {
-    const first = item.sourcePages[0]
-    const last = item.sourcePages[item.sourcePages.length - 1]
-    return first === last ? `来源：第 ${first} 页` : `来源：第 ${first}–${last} 页`
+  if (isManualPreviewItem(item)) return '手动新增，无源文件定位'
+
+  const locator = item.sourceLocator
+  const locatedLines = sourceLineRange(item)
+  if (props.processType === 'unstructured') {
+    const parts: string[] = []
+    if (item.sourcePages?.length) {
+      const first = item.sourcePages[0]
+      const last = item.sourcePages[item.sourcePages.length - 1]
+      parts.push(first === last ? `第 ${first} 页` : `第 ${first}–${last} 页`)
+    }
+    if (locatedLines) {
+      parts.push(
+        locatedLines.start === locatedLines.end
+          ? `第 ${locatedLines.start} 行`
+          : `第 ${locatedLines.start}–${locatedLines.end} 行`,
+      )
+    }
+    if (item.headingPath?.length) parts.push(`章节：${item.headingPath.join(' / ')}`)
+    return parts.length ? `来源：${parts.join(' · ')}` : '来源：源文件内容（无精确定位）'
  }
-  if (item.sourceStartLine == null || item.sourceEndLine == null) return '手动新增，无源文件定位'
-  return item.sourceStartLine === item.sourceEndLine
-    ? `来源：第 ${item.sourceStartLine} 行`
-    : `来源：第 ${item.sourceStartLine}–${item.sourceEndLine} 行`
+
+  if (locator?.kind === 'xlsx') {
+    const sheet = locator.sheet_name || `工作表 ${Number(locator.sheet_index ?? 0) + 1}`
+    return locator.row_number != null
+      ? `来源：${sheet} · 第 ${locator.row_number} 行`
+      : `来源：${sheet}`
+  }
+  if (locator?.kind === 'json') {
+    return locator.json_pointer
+      ? `来源：JSON 路径 ${locator.json_pointer}`
+      : '来源：JSON 根对象'
+  }
+  if (locatedLines) {
+    return locatedLines.start === locatedLines.end
+      ? `来源：第 ${locatedLines.start} 行`
+      : `来源：第 ${locatedLines.start}–${locatedLines.end} 行`
+  }
+  return '来源：源文件记录'
 }
 </script>

@@ -175,6 +273,31 @@ function lineRange(item: PreviewItem) {
          <div>
            <strong>源文件 · {{ fileName }}</strong>
          </div>
+          <div
+            v-if="!isPdfSource && !isOfficeSource && lines.length"
+            class="source-window-controls"
+            aria-label="源文件行窗口"
+          >
+            <span>第 {{ visibleSourceWindow.startLine }}–{{ visibleSourceWindow.endLine }} 行</span>
+            <el-button
+              link
+              size="small"
+              aria-label="查看上一段源文件"
+              :disabled="!visibleSourceWindow.hasPrevious"
+              @click="showPreviousSourceWindow"
+            >
+              上一段
+            </el-button>
+            <el-button
+              link
+              size="small"
+              aria-label="查看下一段源文件"
+              :disabled="!visibleSourceWindow.hasMore"
+              @click="showNextSourceWindow"
+            >
+              下一段
+            </el-button>
+          </div>
        </div>

        <PdfSourceViewer
@@ -197,8 +320,9 @@ function lineRange(item: PreviewItem) {
            v-for="line in lines"
            :key="line.number"
            class="source-line"
-            :class="{ 'is-highlighted': isLineHighlighted(line.start, line.end) }"
+            :class="{ 'is-highlighted': isLineHighlighted(line.number, line.start, line.end) }"
            :data-source-start="line.start"
+            :data-line-number="line.number"
          >
            <span class="line-number">{{ line.number }}</span>
            <span class="line-content">{{ line.content || ' ' }}</span>
@@ -282,7 +406,7 @@ function lineRange(item: PreviewItem) {
          />
          <div class="editor-actions">
            <el-button
-              v-if="editingItem.sourceStart != null"
+              v-if="!isManualPreviewItem(editingItem)"
              link
              @click="restoreItem"
            >
@@ -431,6 +555,22 @@ function lineRange(item: PreviewItem) {
  }
 }

+.source-window-controls {
+  flex: none;
+  gap: 2px !important;
+
+  > span {
+    margin-right: 4px;
+    color: #8a93a3;
+    font-size: 11px;
+    white-space: nowrap;
+  }
+
+  :deep(.el-button) {
+    margin-left: 0;
+  }
+}
+
 .source-viewer {
  flex: 1;
  height: 538px;
--- a/frontend/src/views/data-process/create/StructuredOptionsPanel.vue
+++ b/frontend/src/views/data-process/create/StructuredOptionsPanel.vue
@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import { computed } from 'vue'
 import type {
  GenerationControlOptions,
  PreprocessOption,
@@ -21,27 +22,32 @@ const emit = defineEmits<{
  'update:options': [value: StructuredProcessOptions]
 }>()

-const PREPROCESS_OPTIONS: Array<{
-  value: PreprocessOption
+const PREPROCESS_GROUPS: Array<{
+  values: PreprocessOption[]
  label: string
  description: string
 }> = [
-  { value: 'clean_invalid', label: '清理无效数据', description: '清理全空列，并剔除关键字段残缺的数据行' },
  {
-    value: 'detect_structure',
-    label: '嵌套结构展平',
-    description: '展平嵌套对象和可解析的 JSON 字段；Excel 表头与合并单元格在上传时自动解析',
+    values: ['clean_invalid', 'deduplicate'],
+    label: '数据清洗',
+    description: '清理全空列和空记录，并删除内容完全相同的记录；不会猜测可空字段是否必填',
  },
  {
-    value: 'deduplicate',
-    label: '重复记录去重',
-    description: '按整行内容或 id、uuid、key、code、*_id 等身份字段去重，暂不支持自定义组合字段',
+    values: ['detect_structure', 'normalize_format'],
+    label: '结构标准化',
+    description: '展平嵌套对象和可解析的 JSON 字段，并统一编码、空白、字段名和 JSON 序列化格式',
+  },
+  {
+    values: ['desensitize'],
+    label: '敏感信息脱敏',
+    description: '识别并脱敏姓名、手机号、邮箱和身份证号',
  },
-  { value: 'normalize_format', label: '数据格式标准化', description: '按所选规则统一编码、空白、字段名及 JSON 序列化格式' },
-  { value: 'filter_anomaly', label: '异常数据过滤', description: '使用 IQR 识别数值离群值，并过滤乱码等异常记录' },
-  { value: 'desensitize', label: '敏感信息脱敏', description: '识别并脱敏姓名、手机号、邮箱和身份证号' },
 ]

+const legacyAnomalyFilterEnabled = computed(() => (
+  props.options.preprocessOptions.includes('filter_anomaly')
+))
+
 function updateField<K extends keyof StructuredProcessOptions>(
  field: K,
  value: StructuredProcessOptions[K],
@@ -57,14 +63,26 @@ function updateQaPairsPerRow(value: number | undefined) {
  updateField('qaPairsPerRow', normalizeQaPairsGenerationCount(value))
 }

-function updatePreprocessOptions(value: Array<string | number | boolean>) {
-  const allowedValues = new Set(PREPROCESS_OPTIONS.map((option) => option.value))
-  const preprocessOptions = Array.from(new Set(value.filter(
-    (option): option is PreprocessOption => (
-      typeof option === 'string' && allowedValues.has(option as PreprocessOption)
-    ),
-  )))
-  updateField('preprocessOptions', preprocessOptions)
+function selectedCount(values: PreprocessOption[]) {
+  return values.filter((value) => props.options.preprocessOptions.includes(value)).length
+}
+
+function groupSelected(values: PreprocessOption[]) {
+  return selectedCount(values) === values.length
+}
+
+function groupIndeterminate(values: PreprocessOption[]) {
+  const count = selectedCount(values)
+  return count > 0 && count < values.length
+}
+
+function updatePreprocessGroup(values: PreprocessOption[], checked: string | number | boolean) {
+  const next = new Set(props.options.preprocessOptions)
+  values.forEach((value) => {
+    if (Boolean(checked)) next.add(value)
+    else next.delete(value)
+  })
+  updateField('preprocessOptions', [...next])
 }
 </script>

@@ -73,26 +91,34 @@ function updatePreprocessOptions(value: Array<string | number | boolean>) {
    <div class="section-title-row">
      <div>
        <h3>预处理选项</h3>
-        <p>选择在生成问答对之前需要执行的数据处理方式</p>
+        <p>默认不执行预处理，请按数据情况自行选择</p>
      </div>
    </div>
-    <el-checkbox-group
-      :model-value="options.preprocessOptions"
-      class="preprocess-option-grid"
-      @update:model-value="updatePreprocessOptions"
-    >
-      <el-checkbox
-        v-for="option in PREPROCESS_OPTIONS"
-        :key="option.value"
-        :value="option.value"
+    <div class="preprocess-option-grid">
+      <label
+        v-for="group in PREPROCESS_GROUPS"
+        :key="group.label"
        class="preprocess-option"
+        :class="{ 'is-checked': groupSelected(group.values) }"
      >
+        <el-checkbox
+          :model-value="groupSelected(group.values)"
+          :indeterminate="groupIndeterminate(group.values)"
+          @update:model-value="updatePreprocessGroup(group.values, $event)"
+        />
        <span class="preprocess-option-copy">
-          <strong>{{ option.label }}</strong>
-          <small>{{ option.description }}</small>
+          <strong>{{ group.label }}</strong>
+          <small>{{ group.description }}</small>
        </span>
-      </el-checkbox>
-    </el-checkbox-group>
+      </label>
+    </div>
+    <el-alert
+      v-if="legacyAnomalyFilterEnabled"
+      class="legacy-preprocess-alert"
+      type="warning"
+      :closable="false"
+      title="该历史任务仍启用了已停用的“异常数据过滤”；为保证结果可复现，本次继续保留"
+    />
  </div>

  <div class="form-section generation-options-section">
--- a/frontend/src/views/data-process/create/UnstructuredOptionsPanel.vue
+++ b/frontend/src/views/data-process/create/UnstructuredOptionsPanel.vue
@@ -119,7 +119,7 @@ defineExpose({ revealValidation })
    <div class="section-title-row">
      <div>
        <h3>预处理选项</h3>
-        <p>默认启用结构感知的推荐策略，只需决定是否需要脱敏</p>
+        <p>默认不执行预处理，请按文档情况自行选择</p>
      </div>
    </div>
    <div class="preprocess-option-grid">
--- a/frontend/src/views/data-process/create/dataProcessCreateState.ts
+++ b/frontend/src/views/data-process/create/dataProcessCreateState.ts
@@ -97,7 +97,7 @@ export function isBuiltInGenerationPrompt(value: string) {

 export function createDefaultStructuredOptions(): StructuredProcessOptions {
  return {
-    preprocessOptions: ['clean_invalid', 'detect_structure', 'deduplicate', 'normalize_format'],
+    preprocessOptions: [],
    semanticEnrichment: false,
    qaPairsPerRow: 1,
    datasetSplit: { train: 80, validation: 10, test: 10 },
@@ -117,22 +117,15 @@ export function createDefaultStructuredOptions(): StructuredProcessOptions {

 export function createDefaultUnstructuredOptions(): UnstructuredProcessOptions {
  return {
-    preprocessOptions: [
-      'clean_invalid_content',
-      'detect_document_structure',
-      'merge_short_content',
-      'filter_low_quality',
-      'deduplicate_content',
-      'preserve_context',
-    ],
+    preprocessOptions: [],
    chunkMethod: 'layout_hybrid',
    chunkSize: 800,
    chunkOverlap: 100,
    minChunkSize: 100,
    semanticBreakpointPercentile: 95,
-    preserveTables: true,
-    preserveCodeBlocks: true,
-    preserveLists: true,
+    preserveTables: false,
+    preserveCodeBlocks: false,
+    preserveLists: false,
    semanticEnrichment: false,
    qaPairsPerChunk: 1,
    datasetSplit: { train: 80, validation: 10, test: 10 },
@@ -218,11 +211,21 @@ function generationOptionsFromConfig(
 export function createStructuredOptionsFromConfig(config: DataProcessConfig): StructuredProcessOptions {
  const defaults = createDefaultStructuredOptions()
  const preprocessOptions = configValue<unknown>(config, 'preprocess_options', [])
+  const supportedPreprocessOptions = new Set<PreprocessOption>([
+    'clean_invalid',
+    'deduplicate',
+    'detect_structure',
+    'normalize_format',
+    'desensitize',
+    'filter_anomaly',
+  ])
  return {
    ...defaults,
    ...generationOptionsFromConfig(config, defaults),
    preprocessOptions: Array.isArray(preprocessOptions)
-      ? preprocessOptions.map(String) as PreprocessOption[]
+      ? Array.from(new Set(preprocessOptions.map(String).filter(
+        (option): option is PreprocessOption => supportedPreprocessOptions.has(option as PreprocessOption),
+      )))
      : defaults.preprocessOptions,
    semanticEnrichment: Boolean(configValue(
      config,
--- a/frontend/src/views/data-process/create/previewModel.ts
+++ b/frontend/src/views/data-process/create/previewModel.ts
@@ -1,4 +1,4 @@
-import type { SourceLine } from './types'
+import type { PreviewItem, SourceLine } from './types'

 /** 仅用于“使用示例”上传；正式预览和切片全部由后端生成。 */
 export const DEFAULT_SOURCE_TEXT = [
@@ -12,19 +12,141 @@ export const DEFAULT_SOURCE_TEXT = [
  '答：复利是将上一期利息加入本金，再计算下一期利息。',
 ].join('\n')

-/**
- * 把后端返回的字符偏移映射为源文件行，仅负责界面高亮，不参与切片。
- */
-export function sourceLines(sourceText: string): SourceLine[] {
-  const rawLines = sourceText.split('\n')
-  let cursor = 0
+export interface SourceLineWindow {
+  lines: SourceLine[]
+  startLine: number
+  endLine: number
+  hasPrevious: boolean
+  hasMore: boolean
+}

-  return rawLines.map((content, index) => {
-    const start = cursor
-    const end = start + content.length
-    cursor = end + (index < rawLines.length - 1 ? 1 : 0)
-    return { number: index + 1, content, start, end }
-  })
+function unicodeCodePointLength(value: string, start = 0, end = value.length) {
+  let length = 0
+  let index = start
+  while (index < end) {
+    const codePoint = value.codePointAt(index)
+    index += codePoint != null && codePoint > 0xffff ? 2 : 1
+    length += 1
+  }
+  return length
+}
+
+function advanceCodePoints(value: string, start: number, end: number, count: number) {
+  let index = start
+  let remaining = Math.max(0, count)
+  while (index < end && remaining > 0) {
+    const codePoint = value.codePointAt(index)
+    index += codePoint != null && codePoint > 0xffff ? 2 : 1
+    remaining -= 1
+  }
+  return index
+}
+
+/**
+ * 只扫描并返回当前可见行窗口，不对全文 split，避免大文件生成巨量字符串数组。
+ * 字符定位场景可开启 code point 偏移，以与后端 Python 的字符计数保持一致。
+ */
+export function sourceLineWindow(
+  sourceText: string,
+  requestedStartLine: number,
+  maxLines: number,
+  maxCharactersPerLine: number,
+  focusLine: number | null = null,
+  focusOffset: number | null = null,
+): SourceLineWindow {
+  const startLine = Math.max(1, Math.trunc(requestedStartLine) || 1)
+  const limit = Math.max(1, Math.trunc(maxLines) || 1)
+  const characterLimit = Math.max(1, Math.trunc(maxCharactersPerLine) || 1)
+  const trackUnicodeOffsets = focusOffset != null
+  const lines: SourceLine[] = []
+  let lineNumber = 1
+  let jsCursor = 0
+  let sourceCursor = 0
+
+  while (jsCursor <= sourceText.length && lineNumber < startLine) {
+    const newlineIndex = sourceText.indexOf('\n', jsCursor)
+    const jsEnd = newlineIndex >= 0 ? newlineIndex : sourceText.length
+    sourceCursor = trackUnicodeOffsets
+      ? sourceCursor + unicodeCodePointLength(sourceText, jsCursor, jsEnd) + (newlineIndex >= 0 ? 1 : 0)
+      : (newlineIndex >= 0 ? newlineIndex + 1 : sourceText.length + 1)
+    jsCursor = newlineIndex >= 0 ? newlineIndex + 1 : sourceText.length + 1
+    lineNumber += 1
+  }
+
+  while (jsCursor <= sourceText.length && lines.length < limit) {
+    const newlineIndex = sourceText.indexOf('\n', jsCursor)
+    const jsEnd = newlineIndex >= 0 ? newlineIndex : sourceText.length
+    const fullSourceEnd = trackUnicodeOffsets
+      ? sourceCursor + unicodeCodePointLength(sourceText, jsCursor, jsEnd)
+      : jsEnd
+    const focusedStart = focusLine === lineNumber && focusOffset != null
+      ? Math.max(sourceCursor, focusOffset - Math.floor(characterLimit / 3))
+      : sourceCursor
+    const segmentSourceStart = Math.min(
+      focusedStart,
+      Math.max(sourceCursor, fullSourceEnd - characterLimit),
+    )
+    const relativeSegmentStart = trackUnicodeOffsets
+      ? segmentSourceStart - sourceCursor
+      : Math.max(0, segmentSourceStart - jsCursor)
+    const segmentJsStart = advanceCodePoints(
+      sourceText,
+      jsCursor,
+      jsEnd,
+      relativeSegmentStart,
+    )
+    const segmentJsEnd = advanceCodePoints(
+      sourceText,
+      segmentJsStart,
+      jsEnd,
+      characterLimit,
+    )
+    const segmentLength = trackUnicodeOffsets
+      ? unicodeCodePointLength(sourceText, segmentJsStart, segmentJsEnd)
+      : segmentJsEnd - segmentJsStart
+    const start = trackUnicodeOffsets ? segmentSourceStart : segmentJsStart
+    const end = start + segmentLength
+    const content = `${segmentJsStart > jsCursor ? '… ' : ''}${sourceText.slice(segmentJsStart, segmentJsEnd)}${segmentJsEnd < jsEnd ? ' …' : ''}`
+    lines.push({ number: lineNumber, content, start, end })
+    sourceCursor = fullSourceEnd + (newlineIndex >= 0 ? 1 : 0)
+    jsCursor = newlineIndex >= 0 ? newlineIndex + 1 : sourceText.length + 1
+    lineNumber += 1
+  }
+
+  return {
+    lines,
+    startLine: lines[0]?.number ?? startLine,
+    endLine: lines[lines.length - 1]?.number ?? startLine,
+    hasPrevious: startLine > 1,
+    hasMore: jsCursor <= sourceText.length,
+  }
+}
+
+/** 根据后端 code point 偏移查找物理行号，不构建全文行数组。 */
+export function sourceLineNumberAtOffset(sourceText: string, targetOffset: number) {
+  const normalizedOffset = Math.max(0, Math.trunc(targetOffset) || 0)
+  let offset = 0
+  let lineNumber = 1
+  for (const character of sourceText) {
+    if (offset >= normalizedOffset) break
+    if (character === '\n') lineNumber += 1
+    offset += 1
+  }
+  return lineNumber
+}
+
+/**
+ * 手动新增项可能先以空内容保存为 invalid，编辑后又由后端标记为 modified，
+ * 因此不能只依赖可变的 status；空原文且完全没有来源定位才是稳定兜底。
+ */
+export function isManualPreviewItem(item: PreviewItem): boolean {
+  const hasSourceLocation = item.sourceStart != null
+    || item.sourceEnd != null
+    || item.sourceStartLine != null
+    || item.sourceEndLine != null
+    || Boolean(item.sourcePages?.length)
+    || Boolean(item.sourceLocator)
+  return item.status === 'manual' || (!item.originalContent && !hasSourceLocation)
 }

 /** 与后端预览 token 估算规则一致，仅用于编辑中的即时计数。 */
--- a/frontend/src/views/data-process/create/types.ts
+++ b/frontend/src/views/data-process/create/types.ts
@@ -24,6 +24,7 @@ export type PreprocessOption =
  | 'detect_structure'
  | 'deduplicate'
  | 'normalize_format'
+  /** 仅用于恢复历史任务，新任务界面不再提供。 */
  | 'filter_anomaly'
  | 'desensitize'

@@ -94,7 +95,6 @@ export interface ExternalDataSource {
 export interface UploadedDataFile {
  uid: string | number
  sourceFileId?: string
-  rawFile?: File
  name: string
  size: number
  count: number
@@ -118,6 +118,22 @@ export interface SourceLine {
  end: number
 }

+export type PreviewSourceLocatorKind = 'json' | 'jsonl' | 'csv' | 'xlsx'
+
+export interface PreviewSourceLocator {
+  kind: PreviewSourceLocatorKind
+  record_index?: number | null
+  start_line?: number | null
+  end_line?: number | null
+  source_start?: number | null
+  source_end?: number | null
+  json_pointer?: string | null
+  sheet_index?: number | null
+  sheet_name?: string | null
+  row_number?: number | null
+  sheet_record_index?: number | null
+}
+
 export interface PreviewItem {
  id: string
  sourceFileId: string
@@ -129,6 +145,8 @@ export interface PreviewItem {
  sourceStartLine: number | null
  sourceEndLine: number | null
  sourcePages?: number[]
+  sourceLocator?: PreviewSourceLocator
+  headingPath?: string[]
  tokenCount: number
  status: 'original' | 'modified' | 'manual' | 'invalid'
  qualityScore?: number
--- a/frontend/src/views/data-process/create/useDataProcessGeneration.ts
+++ b/frontend/src/views/data-process/create/useDataProcessGeneration.ts
@@ -71,7 +71,11 @@ export function useDataProcessGeneration(bindings: GenerationBindings) {
  let generationTimer: ReturnType<typeof setTimeout> | null = null
  let generationRun = 0
  let pollFailureCount = 0
-  let generationStarting = false
+  const generationStarting = ref(false)
+  const generationRestoring = ref(false)
+  const canReturnFromGeneration = computed(() => (
+    generation.status === 'idle' && !generationStarting.value && !generationRestoring.value
+  ))

  function stopGenerationTimer() {
    generationRun += 1
@@ -170,14 +174,14 @@ export function useDataProcessGeneration(bindings: GenerationBindings) {
  }

  async function startGeneration() {
-    if (generationStarting || generation.status === 'running') return false
+    if (generationStarting.value || generation.status === 'running') return false
    const taskId = bindings.taskId.value
    if (!taskId) {
      ElMessage.error('任务尚未创建，请返回上一步重试')
      return false
    }

-    generationStarting = true
+    generationStarting.value = true
    let runId: number | null = null
    try {
      const canStart = await bindings.beforeGenerate?.()
@@ -204,17 +208,18 @@ export function useDataProcessGeneration(bindings: GenerationBindings) {
      generation.message = error instanceof Error ? error.message : '启动数据处理失败，请重试。'
      return false
    } finally {
-      generationStarting = false
+      generationStarting.value = false
    }
  }

  async function resumeGeneration() {
    const taskId = bindings.taskId.value
    if (!taskId) return
-    stopGenerationTimer()
-    const activeRunId = generationRun
-    pollFailureCount = 0
+    generationRestoring.value = true
    try {
+      stopGenerationTimer()
+      const activeRunId = generationRun
+      pollFailureCount = 0
      const progress = await getDataProcessProgress(taskId)
      if (activeRunId !== generationRun) return
      if (progress.status === 'running') {
@@ -236,6 +241,8 @@ export function useDataProcessGeneration(bindings: GenerationBindings) {
    } catch (error) {
      generation.status = 'failed'
      generation.message = error instanceof Error ? error.message : '查询任务进度失败，请重试。'
+    } finally {
+      generationRestoring.value = false
    }
  }

@@ -430,7 +437,9 @@ export function useDataProcessGeneration(bindings: GenerationBindings) {

  return {
    bulkRegeneration,
+    canReturnFromGeneration,
    generation,
+    generationStarting,
    regeneratingResultId,
    resultRegenerationBusy,
    results,
--- a/frontend/src/views/data-process/create/useDataProcessRegeneration.ts
+++ b/frontend/src/views/data-process/create/useDataProcessRegeneration.ts
@@ -2,7 +2,6 @@ import { computed, nextTick, ref, type Reactive, type Ref } from 'vue'
 import { useRoute } from 'vue-router'
 import {
  getDataProcessPreview,
-  getDataProcessSourceContent,
  getDataProcessTask,
  regenerateDataProcessTask,
 } from '@/api/modules/dataProcess'
@@ -15,7 +14,10 @@ import {
  createStructuredOptionsFromConfig,
  createUnstructuredOptionsFromConfig,
 } from './dataProcessCreateState'
-import { mapDataProcessSourceFile } from './useDataProcessSourceUpload'
+import {
+  loadCanonicalSourceContent,
+  mapDataProcessSourceFile,
+} from './useDataProcessSourceUpload'
 import type {
  PreviewItem,
  ProcessType,
@@ -50,24 +52,6 @@ interface RegenerationBindings {
  resetDownstream: () => void
 }

-async function loadSourceContent(taskId: string, fileId: string | number) {
-  const chunks: string[] = []
-  let startLine = 1
-  while (true) {
-    const source = await getDataProcessSourceContent(taskId, fileId, {
-      start_line: startLine,
-      line_count: 10_000,
-    })
-    chunks.push(source.content || '')
-    if (!source.has_more) break
-    const nextLine = Number(source.end_line || startLine) + 1
-    if (nextLine <= startLine) break
-    startLine = nextLine
-  }
-  // source_content_lines 已保留原始换行；分页之间直接拼接，避免凭空增加空行并破坏偏移。
-  return chunks.join('')
-}
-
 async function loadAllPreviews(taskId: string, mapPreviewItem: RegenerationBindings['mapPreviewItem']) {
  const first = await getDataProcessPreview(taskId, { page: 1, page_size: 500 })
  const items = [...first.items]
@@ -97,7 +81,7 @@ export function useDataProcessRegeneration(bindings: RegenerationBindings) {
  async function hydrateWorkspace(task: DataProcessTask, preservePreviews: boolean) {
    const taskId = String(task.id)
    bindings.uploadedFiles.value = await Promise.all((task.source_files || []).map(async (file) => (
-      mapDataProcessSourceFile(file, await loadSourceContent(taskId, file.id))
+      mapDataProcessSourceFile(file, await loadCanonicalSourceContent(taskId, file.id))
    )))
    bindings.previewItems.value = preservePreviews
      ? await loadAllPreviews(taskId, bindings.mapPreviewItem)
--- a/frontend/src/views/data-process/create/useDataProcessSourceUpload.ts
+++ b/frontend/src/views/data-process/create/useDataProcessSourceUpload.ts
@@ -6,7 +6,6 @@ import {
 } from '@/api/modules/dataProcess'
 import type { ProcessType, UploadedDataFile } from './types'

-const BINARY_FILE_EXTENSIONS = new Set(['xlsx', 'pdf', 'docx', 'pptx'])
 const STRUCTURED_FILE_EXTENSIONS = new Set(['json', 'jsonl', 'ndjson', 'csv', 'tsv', 'xlsx'])
 const UNSTRUCTURED_FILE_EXTENSIONS = new Set([
  'txt', 'md', 'markdown', 'pdf', 'docx', 'pptx', 'json', 'jsonl', 'ndjson',
@@ -15,11 +14,11 @@ const LEGACY_OFFICE_EXTENSIONS = new Set(['doc', 'xls', 'ppt'])
 const MAX_SOURCE_FILE_BYTES = 200 * 1024 * 1024
 const MAX_SOURCE_FILE_COUNT = 20
 const MAX_SOURCE_BATCH_BYTES = 500 * 1024 * 1024
+const SOURCE_CONTENT_PAGE_CHARS = 1_000_000

 interface SourceUploadJob {
  uid: string
  file: File
-  extension: string
 }

 interface SourceUploadOptions {
@@ -60,9 +59,6 @@ export function validateSourceFileSelection(
        : '结构化数据支持 JSON、JSONL、NDJSON、CSV、TSV、XLSX',
    }
  }
-  if (selectedFiles.some((file) => file.name === raw.name && file.size === raw.size)) {
-    return { valid: false, severity: 'warning', message: '同名且同大小的文件已经选择' }
-  }
  if (selectedFiles.length >= MAX_SOURCE_FILE_COUNT) {
    return { valid: false, severity: 'warning', message: `每个任务最多选择 ${MAX_SOURCE_FILE_COUNT} 个文件` }
  }
@@ -73,6 +69,34 @@ export function validateSourceFileSelection(
  return { valid: true, extension }
 }

+function unicodeCodePointLength(value: string) {
+  let length = 0
+  for (const _character of value) length += 1
+  return length
+}
+
+/** 分页读取服务端保存的规范化正文，避免重新使用浏览器本地解码结果。 */
+export async function loadCanonicalSourceContent(
+  taskId: string | number,
+  fileId: string | number,
+) {
+  const chunks: string[] = []
+  let offset = 0
+  while (true) {
+    const source = await getDataProcessSourceContent(taskId, fileId, {
+      offset,
+      limit: SOURCE_CONTENT_PAGE_CHARS,
+    })
+    const content = source.content || ''
+    chunks.push(content)
+    if (!source.has_more) break
+    const nextOffset = Number(source.offset ?? offset) + unicodeCodePointLength(content)
+    if (nextOffset <= offset) throw new Error('服务端规范化内容分页异常，请删除文件后重试')
+    offset = nextOffset
+  }
+  return chunks.join('')
+}
+
 export function mapDataProcessSourceFile(
  file: DataProcessSourceFile,
  content = '',
@@ -126,16 +150,6 @@ export function useDataProcessSourceUpload(options: SourceUploadOptions) {
    pending.uploadError = undefined

    try {
-      let content = ''
-      if (!BINARY_FILE_EXTENSIONS.has(job.extension)) {
-        try {
-          content = new TextDecoder('utf-8', { fatal: true }).decode(await job.file.arrayBuffer())
-        } catch {
-          throw new Error('文本文件不是有效的 UTF-8 编码，请转换编码后重试')
-        }
-        if (!content.trim()) throw new Error('不能上传空文件')
-      }
-
      const uploaded = await uploadDataProcessSourceFiles(currentTaskId, [job.file], (progress) => {
        pending.uploadProgress = progress
      })
@@ -144,22 +158,13 @@ export function useDataProcessSourceUpload(options: SourceUploadOptions) {

      // 先登记后端 ID，确保正文读取失败时仍可正确删除已落库的文件。
      Object.assign(pending, mapDataProcessSourceFile(source), {
-        rawFile: job.file,
        status: 'uploading',
        uploadProgress: 99,
      })
-      if (BINARY_FILE_EXTENSIONS.has(job.extension)) {
-        try {
-          const parsed = await getDataProcessSourceContent(currentTaskId, source.id, {
-            start_line: 1,
-            line_count: 10_000,
-          })
-          pending.content = parsed.content
-        } catch {
-          // 原文件已经成功落库，正文稍后仍可由预览构建接口读取，不重复上传。
-        }
-      } else {
-        pending.content = content
+      try {
+        pending.content = await loadCanonicalSourceContent(currentTaskId, source.id)
+      } catch {
+        throw new Error('文件已上传，但服务端规范化内容读取失败，请删除文件后重试')
      }

      pending.status = 'ready'