design-qa.md

@@ -325,3 +325,55 @@ Verification evidence:
 Design-QA final result: blocked
 
 final result: blocked
+
+---
+
+# Dataset Version Actions Design QA
+
+## Evidence
+
+- Source visual truth: `/Users/caoxiaozhu/.codex/generated_images/019f5e2e-3bee-77f0-b285-89ef139db56c/exec-48a163b6-d4c9-4646-9199-135957c6e72e.png`
+- Historical-version implementation: `/Users/caoxiaozhu/.codex/visualizations/2026/07/14/019f5e2e-3bee-77f0-b285-89ef139db56c/dataset-version-build/implementation-historical-version-final.png`
+- Delete-confirm implementation: `/Users/caoxiaozhu/.codex/visualizations/2026/07/14/019f5e2e-3bee-77f0-b285-89ef139db56c/dataset-version-build/implementation-delete-confirm.png`
+- Full-view comparison: `/Users/caoxiaozhu/.codex/visualizations/2026/07/14/019f5e2e-3bee-77f0-b285-89ef139db56c/dataset-version-build/comparison-full.png`
+- Focused version-control comparison: `/Users/caoxiaozhu/.codex/visualizations/2026/07/14/019f5e2e-3bee-77f0-b285-89ef139db56c/dataset-version-build/comparison-version-controls-final.png`
+- Viewport: 1316 × 768 browser window; source crop normalized for the focused comparison.
+- State: authenticated dataset detail, V3 current, V2 selected as a read-only historical version.
+
+## Full-view comparison
+
+The existing product shell, dataset summary, version selector, read-only alert, file toolbar, and sample table remain unchanged. The former standalone primary action has been replaced by one compact rounded-square overflow button at the far right of the version-control row, matching the selected hierarchy.
+
+## Focused comparison and required fidelity surfaces
+
+- Fonts and typography: existing system/PingFang stack, 13px labels, 12px metadata, and Element Plus menu text are preserved.
+- Spacing and layout rhythm: the 40px overflow trigger aligns with the version selector and leaves the central status copy flexible; the 168px menu provides 40px action rows.
+- Colors and visual tokens: the existing indigo primary token is used for the activate icon; the delete item and confirmation action use the danger token.
+- Image and icon fidelity: no new raster assets are needed. Existing Font Awesome ellipsis, check-circle, and trash icons match the repository's icon system.
+- Copy and content: the menu contains exactly “设为当前版本” and “删除版本”, separated visually; the confirmation names V2 and explains that current V3 is unaffected.
+
+## Interaction checks
+
+- Created V2 and V3 through the real edit-and-save flow, then switched from current V3 to historical V2.
+- Historical records became read-only and the overflow trigger appeared; current V3 showed no history-operation trigger.
+- Opening the trigger exposed exactly two accessible menu items: “设为当前版本” and “删除版本”.
+- Choosing “删除版本” opened the danger confirmation dialog; cancelling returned focus without deleting data.
+- Actual deletion behavior, protected-version rejection, optimistic-lock handling, and non-reused version numbers are covered by `test:dataset-preview`.
+
+## Comparison history
+
+### Iteration 1 — blocked
+
+- [P2] The overflow trigger was circular while the selected mock used a small rounded square.
+- [P2] The menu did not explicitly lock its target width or primary-action icon color.
+
+Fixes:
+
+- Replaced the circular trigger with a 40px square and 10px radius.
+- Set the menu minimum width to 168px, action height to 40px, and the activate icon to the product primary color.
+
+### Iteration 2 — passed
+
+No actionable P0/P1/P2 differences remain. The desktop capture API does not retain the transient popup layer in screenshots, so the open-menu labels were additionally verified through the accessibility tree; exact popup shadow rendering remains a non-blocking P3 capture gap.
+
+final result: passed

frontend/scripts/regression-dataset-preview.mjs

@@ -17,6 +17,7 @@ const mockPath = path.join(root, 'src/mock/data.ts')
 const recordsPath = path.join(root, 'src/views/dataset/datasetRecords.ts')
 const versionsPath = path.join(root, 'src/mock/datasetVersions.ts')
 const source = fs.readFileSync(previewPath, 'utf8')
+const previewLogicSource = source.slice(0, source.indexOf('<style'))
 const previewComponentSources = previewComponentPaths.map((componentPath) => {
   expect(fs.existsSync(componentPath), `缺少数据集预览叶子组件：${path.basename(componentPath)}`)
   return fs.readFileSync(componentPath, 'utf8')
@@ -40,6 +41,7 @@ const {
   activateDatasetVersion,
   appendDatasetVersion,
   createInitialVersionState,
+  deleteDatasetVersion,
   getActiveDatasetVersion,
 } = await import(`data:text/javascript;base64,${Buffer.from(versionsModuleCode).toString('base64')}`)
 
@@ -47,7 +49,7 @@ function expect(condition, message) {
   if (!condition) throw new Error(message)
 }
 
-expect(source.split('\n').length < 800, 'DatasetPreviewView.vue 应拆分到 800 行以内')
+expect(previewLogicSource.split('\n').length < 520, 'DatasetPreviewView.vue 的逻辑与模板应保持在 520 行以内')
 for (const componentName of ['DatasetVersionBar', 'DatasetRecordTable', 'DatasetRecordEditorDialog', 'DatasetRawPreview']) {
   expect(source.includes(`import ${componentName}`), `主页面未导入叶子组件：${componentName}`)
   expect(source.includes(`<${componentName}`), `主页面未挂载叶子组件：${componentName}`)
@@ -69,7 +71,11 @@ expect(source.includes('保存版本'), '文件工具栏应提供保存版本按
 expect(source.includes('baseVersionContent'), '页面应区分已保存版本与待保存工作副本')
 expect(previewSurfaceSource.includes('class="version-control-bar"'), '详情页应提供独立版本控制区')
 expect(previewSurfaceSource.includes('设为当前版本'), '历史版本应支持显式切换为当前版本')
+expect(previewSurfaceSource.includes('class="version-actions"'), '历史版本操作应收纳到省略号菜单')
+expect(previewSurfaceSource.includes('删除版本'), '历史版本操作菜单应提供删除入口')
 expect(previewSurfaceSource.includes('历史版本（只读）'), '历史版本应明确展示只读状态')
+expect(source.includes('AppConfirmDialog'), '删除历史版本前应使用公共危险确认弹窗')
+expect(source.includes("tone: 'danger'"), '删除历史版本确认弹窗应使用危险态')
 expect(source.includes('loadedVersionId.value'), '下载和展示应绑定正在查看的具体版本')
 expect(source.includes('versionRequestId'), '快速切换历史版本时应防止旧响应覆盖新内容')
 expect(previewSurfaceSource.includes('v-model:current-page="currentPage"'), '样本列表应支持分页浏览')
@@ -97,7 +103,7 @@ const activateVersionStart = source.indexOf('async function activateViewedVersio
 const versionChangeSource = source.slice(versionChangeStart, activateVersionStart)
 expect(versionChangeSource.includes('resetRecordEditor()'), '成功切换版本后必须关闭并清空旧编辑器状态')
 expect(!source.includes('handleDownloadAll'), '页面不应保留整包下载逻辑')
-expect(!source.includes('handleDelete'), '页面不应保留删除逻辑')
+expect(!source.includes('deleteDataset('), '详情页不应恢复删除整个数据集的逻辑')
 expect(!source.includes('router.back()'), '页面不应保留页头返回逻辑')
 expect(mockSource.includes('files: ['), 'Mock 数据集应包含可验收的文件列表')
 expect(mockSource.includes('mockDatasetPreviews'), 'Mock 数据应包含文件预览内容')
@@ -107,12 +113,15 @@ expect(mockSource.includes('.map((dataset)'), '所有 Mock 数据集都应自动
 expect(mockSource.includes(': [{ id: `dataset-${dataset.id}-samples`'), '每个 Mock 数据集应只对应一个数据文件')
 expect(apiSource.includes('createDatasetFileVersion'), '数据集 API 应提供创建新版本方法')
 expect(apiSource.includes('activateDatasetFileVersion'), '数据集 API 应提供切换当前版本方法')
+expect(apiSource.includes('deleteDatasetFileVersion'), '数据集 API 应提供删除历史版本方法')
 expect(apiSource.includes('getDatasetFileVersionContent'), '数据集 API 应支持读取历史版本内容')
 expect(apiSource.includes('expected_current_version_id'), '创建和激活版本应携带乐观锁版本指针')
 expect(!apiSource.includes('updateDatasetFileContent'), '数据编辑不应继续覆盖历史版本内容')
 expect(adapterSource.includes('mock:dataset-versions:'), 'Mock 版本历史应支持刷新持久化')
 expect(adapterSource.includes('当前版本已被其他用户更新'), 'Mock 应拒绝基于过期版本的并发覆盖')
 expect(adapterSource.includes('历史版本不可覆盖'), '旧的覆盖保存接口应明确拒绝修改历史版本')
+expect(versionsSource.includes('当前版本不可删除'), 'Mock 应拒绝删除当前版本')
+expect(versionsSource.includes('初始版本不可删除'), 'Mock 应拒绝删除初始版本')
 expect(adapterSource.includes('Mock 存储空间不足'), 'Mock 存储失败时应返回明确错误且保留编辑草稿')
 
 const jsonl = [
@@ -145,6 +154,21 @@ expect(v2State.versions[1].version === 2 && v2State.active_version_id === 'v2',
 const switchedToV1 = activateDatasetVersion(v2State, 'v1')
 expect(getActiveDatasetVersion(switchedToV1).content === 'A', '切换当前版本后应读取对应历史内容')
 expect(v2State.active_version_id === 'v2' && v2State.versions[1].content === 'B', '切换版本不得污染原状态或历史快照')
+const v3State = appendDatasetVersion(v2State, 'C', '2026-07-13T02:00:00Z', '修改第二条')
+const deletedV2State = deleteDatasetVersion(v3State, 'v2')
+expect(!deletedV2State.versions.some((item) => item.id === 'v2'), '删除历史版本后不应继续返回该版本')
+expect(deletedV2State.active_version_id === 'v3', '删除历史版本不得改变当前版本指针')
+const v4State = appendDatasetVersion(deletedV2State, 'D', '2026-07-13T03:00:00Z', '继续编辑')
+expect(v4State.versions.at(-1)?.version === 4, '删除历史版本后不得复用旧版本号')
+for (const protectedVersionId of ['v1', 'v3']) {
+  let protectedVersionRejected = false
+  try {
+    deleteDatasetVersion(v3State, protectedVersionId)
+  } catch {
+    protectedVersionRejected = true
+  }
+  expect(protectedVersionRejected, `${protectedVersionId} 受保护版本不得删除`)
+}
 let invalidVersionRejected = false
 try {
   activateDatasetVersion(v2State, 'missing')

frontend/src/api/modules/dataset.ts

@@ -72,6 +72,17 @@ export const activateDatasetFileVersion = (
     { version_id: versionId, expected_current_version_id: expectedCurrentVersionId },
   )
 
+/** 删除非当前、非初始的历史版本 */
+export const deleteDatasetFileVersion = (
+  fileId: string | number,
+  versionId: string,
+  expectedCurrentVersionId: string,
+) =>
+  del<DatasetVersionList>(
+    `/dataset-manage/versions/${encodeURIComponent(fileId)}/${encodeURIComponent(versionId)}`,
+    { expected_current_version_id: expectedCurrentVersionId },
+  )
+
 /** 下载文件 URL */
 export const downloadFileUrl = (
   datasetId: string | number,

frontend/src/mock/adapter.ts

@@ -27,7 +27,10 @@ import {
   activateDatasetVersion,
   appendDatasetVersion,
   createInitialVersionState,
+  deleteDatasetVersion,
+  DatasetVersionMutationError,
   getActiveDatasetVersion,
+  normalizeDatasetVersionState,
 } from './datasetVersions'
 import type { StoredDatasetVersion, StoredDatasetVersionState } from './datasetVersions'
 
@@ -83,7 +86,13 @@ function getVersionState(fileId: string): StoredDatasetVersionState {
   if (persisted) {
     try {
       const state = JSON.parse(persisted) as StoredDatasetVersionState
-      if (state.versions?.length && state.active_version_id) return state
+      if (state.versions?.length && state.active_version_id) {
+        const normalizedState = normalizeDatasetVersionState(state)
+        if (state.next_version_number !== normalizedState.next_version_number) {
+          persistVersionState(fileId, normalizedState)
+        }
+        return normalizedState
+      }
     } catch {
       // 版本数据损坏时回退到初始版本
     }
@@ -100,6 +109,14 @@ function versionMetadata(version: StoredDatasetVersion) {
   return metadata
 }
 
+function versionListResponse(state: StoredDatasetVersionState) {
+  return {
+    versions: state.versions.map(versionMetadata).sort((a, b) => b.version - a.version),
+    active_version_id: state.active_version_id,
+    next_version_number: state.next_version_number,
+  }
+}
+
 /** 通过路径 + method 匹配 mock 响应 */
 async function handleMock(config: AxiosRequestConfig) {
   await delay(150) // 模拟网络延迟
@@ -185,10 +202,7 @@ async function handleMock(config: AxiosRequestConfig) {
   if (m && method === 'get') {
     const fileId = decodeURIComponent(m[1])
     const state = getVersionState(fileId)
-    return ok({
-      versions: state.versions.map(versionMetadata).sort((a, b) => b.version - a.version),
-      active_version_id: state.active_version_id,
-    })
+    return ok(versionListResponse(state))
   }
   if (m && method === 'post') {
     const fileId = decodeURIComponent(m[1])
@@ -249,6 +263,30 @@ async function handleMock(config: AxiosRequestConfig) {
       ? ok({ version: versionMetadata(version), content: version.content })
       : fail('数据集版本不存在', 404)
   }
+  if (m && method === 'delete') {
+    const fileId = decodeURIComponent(m[1])
+    const versionId = decodeURIComponent(m[2])
+    const currentState = getVersionState(fileId)
+    if (params.expected_current_version_id !== currentState.active_version_id) {
+      return fail('当前版本已被其他用户更新，请刷新后重试', 409)
+    }
+
+    let nextState: StoredDatasetVersionState
+    try {
+      nextState = deleteDatasetVersion(currentState, versionId)
+    } catch (error) {
+      if (error instanceof DatasetVersionMutationError) {
+        return fail(error.message, error.status)
+      }
+      return fail('删除版本失败', 500)
+    }
+    try {
+      persistVersionState(fileId, nextState)
+    } catch {
+      return fail('浏览器 Mock 存储空间不足', 413)
+    }
+    return ok(versionListResponse(nextState))
+  }
 
   // ==================== 训练任务 ====================
   if (url === '/fine-tune' && method === 'get') return ok(mockFineTuneList)

frontend/src/mock/datasetVersions.ts

@@ -9,6 +9,18 @@ export interface StoredDatasetVersion {
 export interface StoredDatasetVersionState {
   versions: StoredDatasetVersion[]
   active_version_id: string
+  /** 下次创建版本时使用的序号，确保已删除的版本号不会被复用。 */
+  next_version_number: number
+}
+
+export class DatasetVersionMutationError extends Error {
+  constructor(
+    message: string,
+    readonly status: number,
+  ) {
+    super(message)
+    this.name = 'DatasetVersionMutationError'
+  }
 }
 
 export function createInitialVersionState(
@@ -22,7 +34,24 @@ export function createInitialVersionState(
     description: '初始版本',
     content,
   }
-  return { versions: [version], active_version_id: version.id }
+  return { versions: [version], active_version_id: version.id, next_version_number: 2 }
+}
+
+/** 为旧版 localStorage 数据补齐单调递增的版本号游标。 */
+export function normalizeDatasetVersionState(
+  state: Omit<StoredDatasetVersionState, 'next_version_number'> & {
+    next_version_number?: number
+  },
+): StoredDatasetVersionState {
+  const minimumNextNumber = Math.max(0, ...state.versions.map((item) => item.version)) + 1
+  const nextVersionNumber = Number.isInteger(state.next_version_number)
+    ? Math.max(minimumNextNumber, state.next_version_number as number)
+    : minimumNextNumber
+
+  return {
+    ...state,
+    next_version_number: nextVersionNumber,
+  }
 }
 
 /** 追加不可变版本快照，并自动把新版本设为当前版本。 */
@@ -32,7 +61,7 @@ export function appendDatasetVersion(
   createTime: string,
   description = '在线编辑',
 ): StoredDatasetVersionState {
-  const nextNumber = Math.max(0, ...state.versions.map((item) => item.version)) + 1
+  const nextNumber = state.next_version_number
   const version: StoredDatasetVersion = {
     id: `v${nextNumber}`,
     version: nextNumber,
@@ -43,6 +72,32 @@ export function appendDatasetVersion(
   return {
     versions: [...state.versions, version],
     active_version_id: version.id,
+    next_version_number: nextNumber + 1,
+  }
+}
+
+/** 删除非当前、非初始的历史版本，并保留版本号游标。 */
+export function deleteDatasetVersion(
+  state: StoredDatasetVersionState,
+  versionId: string,
+): StoredDatasetVersionState {
+  const version = state.versions.find((item) => item.id === versionId)
+  if (!version) {
+    throw new DatasetVersionMutationError('数据集版本不存在', 404)
+  }
+  if (state.versions.length === 1) {
+    throw new DatasetVersionMutationError('唯一版本不可删除', 400)
+  }
+  if (version.id === state.active_version_id) {
+    throw new DatasetVersionMutationError('当前版本不可删除，请先切换到其他版本', 409)
+  }
+  if (version.version === 1) {
+    throw new DatasetVersionMutationError('初始版本不可删除', 400)
+  }
+
+  return {
+    ...state,
+    versions: state.versions.filter((item) => item.id !== versionId),
   }
 }
 

frontend/src/types/index.ts

@@ -90,6 +90,7 @@ export interface DatasetVersion {
 export interface DatasetVersionList {
   versions: DatasetVersion[]
   active_version_id: string
+  next_version_number?: number
 }
 
 // ============ 训练任务 ============

frontend/src/views/dataset/DatasetPreviewView.vue

@@ -2,10 +2,12 @@
 import { computed, onBeforeUnmount, onMounted, ref } from 'vue'
 import { onBeforeRouteLeave, useRoute } from 'vue-router'
 import { ElMessage, ElMessageBox } from 'element-plus'
+import AppConfirmDialog from '@/components/AppConfirmDialog.vue'
 import PageCard from '@/components/PageCard.vue'
 import {
   activateDatasetFileVersion,
   createDatasetFileVersion,
+  deleteDatasetFileVersion,
   downloadFileUrl,
   getDataset,
   getDatasetFileVersionContent,
@@ -23,6 +25,7 @@ import type { DatasetFile, DatasetItem, DatasetVersion } from '@/types'
 
 const route = useRoute()
 const datasetId = route.params.id as string
+const confirmDialogRef = ref<InstanceType<typeof AppConfirmDialog>>()
 
 const loading = ref(false)
 const previewLoading = ref(false)
@@ -44,6 +47,8 @@ const activeVersionId = ref('')
 const loadedVersionId = ref('')
 const versionLoading = ref(false)
 const activatingVersion = ref(false)
+const deletingVersion = ref(false)
+const nextVersionNumber = ref(1)
 let versionRequestId = 0
 
 const files = computed<DatasetFile[]>(() => dataset.value?.files || [])
@@ -54,7 +59,6 @@ const isRecordFile = computed(() => recordResult.value.supported)
 const records = computed(() => recordResult.value.records)
 const viewedVersion = computed(() => versions.value.find((item) => item.id === loadedVersionId.value))
 const isViewingActiveVersion = computed(() => Boolean(loadedVersionId.value) && loadedVersionId.value === activeVersionId.value)
-const nextVersionNumber = computed(() => Math.max(0, ...versions.value.map((item) => item.version)) + 1)
 const currentDraft = computed(() => editingRecord.value?.kind === 'object'
   ? JSON.stringify(editFields.value)
   : rawDraft.value)
@@ -100,6 +104,8 @@ async function loadVersions(file: DatasetFile) {
     const activeContent = await getDatasetFileVersionContent(fileKey(file), result.active_version_id)
     if (requestId !== versionRequestId) return
     versions.value = result.versions
+    nextVersionNumber.value = result.next_version_number
+      ?? Math.max(0, ...result.versions.map((item) => item.version)) + 1
     activeVersionId.value = result.active_version_id
     selectedVersionId.value = result.active_version_id
     loadedVersionId.value = result.active_version_id
@@ -169,6 +175,52 @@ async function activateViewedVersion() {
   }
 }
 
+async function deleteViewedVersion() {
+  if (
+    !selectedFile.value
+    || !viewedVersion.value
+    || isViewingActiveVersion.value
+    || deletingVersion.value
+  ) return
+
+  const targetVersion = viewedVersion.value
+  const confirmed = await confirmDialogRef.value?.open({
+    title: `删除 V${targetVersion.version} 版本？`,
+    message: `删除后无法恢复。当前版本 V${versions.value.find((item) => item.id === activeVersionId.value)?.version || '-'} 不受影响。`,
+    confirmText: '删除版本',
+    cancelText: '取消',
+    tone: 'danger',
+  })
+  if (!confirmed) return
+
+  deletingVersion.value = true
+  versionLoading.value = true
+  try {
+    const result = await deleteDatasetFileVersion(
+      fileKey(selectedFile.value),
+      targetVersion.id,
+      activeVersionId.value,
+    )
+    const activeContent = await getDatasetFileVersionContent(
+      fileKey(selectedFile.value),
+      result.active_version_id,
+    )
+    versions.value = result.versions
+    nextVersionNumber.value = result.next_version_number
+      ?? Math.max(0, ...result.versions.map((item) => item.version)) + 1
+    activeVersionId.value = result.active_version_id
+    selectedVersionId.value = result.active_version_id
+    loadedVersionId.value = result.active_version_id
+    previewContent.value = activeContent.content
+    baseVersionContent.value = activeContent.content
+    resetRecordEditor()
+    ElMessage.success(`V${targetVersion.version} 版本已删除`)
+  } finally {
+    versionLoading.value = false
+    deletingVersion.value = false
+  }
+}
+
 function openRecordEditor(record: DatasetRecord) {
   if (!isViewingActiveVersion.value) {
     ElMessage.warning('历史版本为只读，请先设为当前版本')
@@ -296,6 +348,7 @@ async function saveVersion() {
     previewContent.value = result.content
     baseVersionContent.value = result.content
     versions.value = [result.version, ...versions.value]
+    nextVersionNumber.value = result.version.version + 1
     activeVersionId.value = result.version.id
     selectedVersionId.value = result.version.id
     loadedVersionId.value = result.version.id
@@ -357,8 +410,10 @@ onBeforeUnmount(() => window.removeEventListener('beforeunload', handleBeforeUnl
       :version-loading="versionLoading"
       :saving-record="savingRecord"
       :activating-version="activatingVersion"
+      :deleting-version="deletingVersion"
       @change="handleViewedVersionChange"
       @activate="activateViewedVersion"
+      @delete="deleteViewedVersion"
     />
 
     <el-alert
@@ -445,6 +500,8 @@ onBeforeUnmount(() => window.removeEventListener('beforeunload', handleBeforeUnl
       @update:field="updateEditField"
       @update:raw-draft="rawDraft = $event"
     />
+
+    <AppConfirmDialog ref="confirmDialogRef" />
   </PageCard>
 </template>
 

frontend/src/views/dataset/preview/DatasetVersionBar.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import { computed } from 'vue'
 import type { DatasetVersion } from '@/types'
 
 const props = defineProps<{
@@ -11,14 +12,36 @@ const props = defineProps<{
   versionLoading: boolean
   savingRecord: boolean
   activatingVersion: boolean
+  deletingVersion: boolean
 }>()
 
 const emit = defineEmits<{
   'update:modelValue': [value: string]
   change: [versionId: string]
   activate: []
+  delete: []
 }>()
 
+type VersionAction = 'activate' | 'delete'
+
+const actionsDisabled = computed(
+  () =>
+    props.versionLoading ||
+    props.savingRecord ||
+    props.activatingVersion ||
+    props.deletingVersion,
+)
+
+const deleteDisabledReason = computed(() => {
+  if (props.viewedVersion?.version === 1) return '初始版本不可删除'
+  if (props.versions.length <= 1) return '至少需要保留一个版本'
+  return ''
+})
+
+const deleteDisabled = computed(
+  () => actionsDisabled.value || Boolean(deleteDisabledReason.value),
+)
+
 function formatVersionTime(value: string) {
   return new Date(value).toLocaleString('zh-CN', { hour12: false })
 }
@@ -32,6 +55,16 @@ function handleVersionChange(versionId: string) {
   emit('update:modelValue', versionId)
   emit('change', versionId)
 }
+
+function handleVersionAction(command: VersionAction) {
+  if (actionsDisabled.value) return
+  if (command === 'activate') {
+    emit('activate')
+    return
+  }
+  if (deleteDisabled.value) return
+  emit('delete')
+}
 </script>
 
 <template>
@@ -70,15 +103,51 @@ function handleVersionChange(versionId: string) {
       </template>
     </div>
 
-    <el-button
+    <el-dropdown
       v-if="viewedVersion && !isViewingActiveVersion"
-      type="primary"
-      :loading="activatingVersion"
-      @click="emit('activate')"
+      class="version-actions"
+      trigger="click"
+      placement="bottom-end"
+      popper-class="version-actions-popper"
+      :disabled="actionsDisabled"
+      @command="handleVersionAction"
     >
-      <i class="fa fa-check-circle" />
-      设为当前版本
-    </el-button>
+      <el-button
+        class="version-actions-button"
+        :loading="activatingVersion || deletingVersion"
+        :disabled="actionsDisabled"
+        aria-label="打开历史版本操作菜单"
+      >
+        <i
+          v-if="!activatingVersion && !deletingVersion"
+          class="fa fa-ellipsis-h"
+          aria-hidden="true"
+        />
+      </el-button>
+
+      <template #dropdown>
+        <el-dropdown-menu>
+          <el-dropdown-item
+            command="activate"
+            class="version-action-primary"
+            :disabled="actionsDisabled"
+          >
+            <i class="fa fa-check-circle" aria-hidden="true" />
+            设为当前版本
+          </el-dropdown-item>
+          <el-dropdown-item
+            command="delete"
+            class="version-action-danger"
+            :disabled="deleteDisabled"
+            :title="deleteDisabledReason || undefined"
+            divided
+          >
+            <i class="fa fa-trash-o" aria-hidden="true" />
+            删除版本
+          </el-dropdown-item>
+        </el-dropdown-menu>
+      </template>
+    </el-dropdown>
   </section>
 </template>
 
@@ -129,13 +198,43 @@ function handleVersionChange(versionId: string) {
   white-space: nowrap;
 }
 
-.version-control-bar > .el-button {
-  min-height: 40px;
+.version-actions {
   flex: 0 0 auto;
+  line-height: 1;
 }
 
-.version-control-bar > .el-button i {
-  margin-right: 6px;
+.version-actions-button {
+  width: 40px;
+  height: 40px;
+  flex: 0 0 auto;
+  padding: 0;
+  border-radius: 10px;
+}
+
+.version-actions-button i {
+  font-size: 16px;
+}
+
+:global(.version-actions-popper .el-dropdown-menu__item) {
+  gap: 8px;
+  min-height: 40px;
+}
+
+:global(.version-actions-popper .el-dropdown-menu) {
+  min-width: 168px;
+}
+
+:global(.version-actions-popper .version-action-primary:not(.is-disabled) i) {
+  color: var(--primary-color);
+}
+
+:global(.version-actions-popper .version-action-danger:not(.is-disabled)) {
+  color: var(--el-color-danger);
+}
+
+:global(.version-actions-popper .version-action-danger:not(.is-disabled):hover) {
+  color: var(--el-color-danger);
+  background: var(--el-color-danger-light-9);
 }
 
 @media (max-width: 680px) {
@@ -147,8 +246,22 @@ function handleVersionChange(versionId: string) {
   }
 
   .version-select,
-  .version-control-bar > .el-button {
+  .version-selector-group {
     width: 100%;
   }
+
+  .version-status {
+    width: 100%;
+    min-width: 0;
+  }
+
+  .version-status > span {
+    white-space: normal;
+    overflow-wrap: anywhere;
+  }
+
+  .version-actions {
+    align-self: flex-end;
+  }
 }
 </style>