feat(ui): harden MySQL delivery workbench session and credential flow

- Persist workbench state (form, view, task progress) per user/service in sessionStorage; restore on reload re-fetches the task and resumes polling, never persisting the root password itself
- Gate the result tab behind resultReady so an unfinished task cannot show a stale result view
- Add random instance name generation and an async precheck that detects name conflicts against active tasks and delivered instances, mirroring the backend occupancy rules
- Guarantee all four character classes in generated root passwords
- Fetch credentials via the one-time reveal endpoint instead of caching plaintext passwords in localStorage; sanitize legacy history entries and clear the form password once the task is created

frontend/src/views/service/Catalog.vue

@@ -56,8 +56,9 @@
             :key="tab.key"
             type="button"
             class="flow-tab"
-            :class="{ active: activeView === tab.key }"
-            @click="activeView = tab.key"
+            :class="{ active: activeView === tab.key && (tab.key !== 'result' || resultReady), disabled: tab.key === 'result' && !resultReady }"
+            :disabled="tab.key === 'result' && !resultReady"
+            @click="selectFlowTab(tab.key)"
           >
             <strong>{{ tab.title }}</strong>
             <span>{{ tab.subtitle }}</span>
@@ -82,11 +83,14 @@
               <div class="form-grid">
                 <label class="form-field" :class="{ 'is-invalid': instanceNameError }">
                   实例名称
-                  <el-input
-                    v-model="deliveryForm.instanceName"
-                    placeholder="mysql-business-service"
-                    maxlength="63"
-                  />
+                  <div class="instance-name-editor">
+                    <el-input
+                      v-model="deliveryForm.instanceName"
+                      placeholder="mysql-business-service"
+                      maxlength="63"
+                    />
+                    <el-button class="random-name-button" text type="primary" :icon="Refresh" aria-label="随机生成实例名称" title="随机生成符合命名规范的实例名称" @click.stop="regenerateInstanceName">随机</el-button>
+                  </div>
                   <small v-if="instanceNameError" class="field-error">{{ instanceNameError }}</small>
                   <small v-else class="field-help">3–63 位，以小写字母开头，仅支持小写字母、数字和短横线。</small>
                 </label>
@@ -325,7 +329,7 @@
           </div>
         </section>
 
-        <section v-else-if="activeView === 'execution'" class="execution-view">
+        <section v-else-if="activeView === 'execution' || !resultReady" class="execution-view">
           <div class="execution-head">
             <div>
               <h3>AWX 自动交付</h3>
@@ -409,11 +413,11 @@
                   <span class="tag tag-amber">仅展示一次</span>
                 </div>
                 <p>请立即复制或下载凭证文件；关闭后页面不再显示明文密码。</p>
-                <el-button v-if="!credentialRevealed" type="warning" @click="revealCredential">查看一次性密码</el-button>
+                <el-button v-if="!credentialRevealed" type="warning" :loading="credentialRevealing" @click="revealCredential">查看一次性密码</el-button>
                 <div v-else class="credential-secret">
-                  <code>{{ deliveryForm.rootPassword }}</code>
+                  <code>{{ revealedRootCredential?.password }}</code>
                   <div class="credential-actions">
-                    <el-button :icon="CopyDocument" @click="copyText(deliveryForm.rootPassword, 'root 密码已复制')">复制密码</el-button>
+                    <el-button :icon="CopyDocument" @click="copyText(revealedRootCredential?.password || '', 'root 密码已复制')">复制密码</el-button>
                     <el-button :icon="Download" @click="downloadCredentialFile">下载凭证文件</el-button>
                     <el-button type="success" plain :icon="CircleCheck" @click="dismissCredential">已保存，关闭</el-button>
                   </div>
@@ -491,7 +495,7 @@ import { computed, onBeforeUnmount, onMounted, reactive, ref, watch } from 'vue'
 import { ElMessage, ElMessageBox } from 'element-plus'
 import { ArrowDown, Back, CircleCheck, Connection, CopyDocument, DocumentCopy, Download, Monitor, Promotion, Refresh, Setting, Tickets } from '@element-plus/icons-vue'
 import { useRoute, useRouter } from 'vue-router'
-import { deliveryApi, type DeliveryTarget, type TaskEvent } from '@/api/delivery'
+import { deliveryApi, type DeliveryTarget, type DeploymentCredential, type TaskEvent } from '@/api/delivery'
 import { useAuthStore } from '@/stores/auth'
 import { useBusinessLineStore } from '@/stores/businessLine'
 import { useBusinessLineMockProfile } from '@/utils/businessLineMock'
@@ -560,8 +564,45 @@ interface DeliveryHistoryItem {
   errorMessage: string
   createdAt: string
   updatedAt: string
-  credential?: string
-  credentialConsumed?: boolean
+}
+
+interface WorkbenchSnapshot {
+  version: 1
+  serviceKey: string
+  activeView: FlowView
+  precheckPassed: boolean
+  running: boolean
+  deliveryDone: boolean
+  deliveryFailed: boolean
+  deploymentId: string
+  deliveryError: string
+  deliveredHost: string
+  deliveredPort?: number
+  lastDeliveryStatus: string
+  deliveryLog: string
+  steps: DeliveryStep[]
+  form: {
+    instanceName: string
+    version: string
+    mode: string
+    spec: string
+    storageGi: number
+    port?: number
+    charset: string
+    collation: string
+    lowerCaseTableNames: number
+    timezone: string
+    dataDisk: string
+    targetHost: string
+    maxConnections: string
+    redoCapacity: string
+    flushLogAtCommit: number
+    syncBinlog: number
+    ioCapacity: number
+    longQueryTime: number
+    binlogExpireSeconds: number
+    maxBinlogSize: string
+  }
 }
 
 const { currentName } = useBusinessLineMockProfile()
@@ -587,7 +628,7 @@ const basicServices = ref<Service[]>([
     modes: [
       { value: 'single', label: '单实例' },
     ],
-    specs: ['0.5C / 2G', '1C / 2G', '2C / 4G', '4C / 8G', '8C / 16G', '16C / 32G'],
+    specs: ['1C / 2G', '2C / 4G', '4C / 8G', '8C / 16G', '16C / 32G'],
     disks: ['20 GB', '50 GB', '100 GB', '500 GB', '1000 GB'],
     charsets: ['utf8mb4', 'utf8', 'gbk', 'latin1'],
     defaultPort: 0,
@@ -720,17 +761,14 @@ const precheckPassed = ref(false)
 const running = ref(false)
 const deliveryDone = ref(false)
 const deliveryFailed = ref(false)
+const taskStateLoading = ref(false)
 const credentialRevealed = ref(false)
 const credentialDismissed = ref(false)
+const credentialRevealing = ref(false)
+const revealedCredentials = ref<DeploymentCredential[]>([])
 const deliveryHistory = ref<DeliveryHistoryItem[]>(loadDeliveryHistory())
-const deliveryCredentials = new Map<string, string>()
-const deliveryCredentialStates = new Map<string, { revealed: boolean; dismissed: boolean }>()
-deliveryHistory.value.forEach((item) => {
-  if (item.credential && !item.credentialConsumed) {
-    deliveryCredentials.set(item.id, item.credential)
-    deliveryCredentialStates.set(item.id, { revealed: false, dismissed: false })
-  }
-})
+let workbenchReady = false
+let restoringWorkbench = false
 const canceling = ref(false)
 const deploymentId = ref('')
 const deliveryError = ref('')
@@ -758,7 +796,7 @@ const deliveryForm = reactive({
   version: 'MySQL 8.0',
   mode: 'single',
   spec: '1C / 2G',
-  storageGi: 50,
+  storageGi: 20,
   port: undefined as number | undefined,
   rootPassword: generateRootPassword(),
   charset: 'utf8mb4',
@@ -850,6 +888,8 @@ const runnerPreview = computed(() => {
 })
 const connectionReady = computed(() => Boolean(deliveredHost.value && deliveredPort.value))
 const credentialEligible = computed(() => connectionReady.value && ['finished', 'register_failed'].includes(lastDeliveryStatus.value))
+const revealedRootCredential = computed(() => revealedCredentials.value.find((item) => item.username === 'root'))
+const resultReady = computed(() => !taskStateLoading.value && !running.value && isTerminalDeliveryStatus(lastDeliveryStatus.value))
 const previewAddress = computed(() => `${selectedHost.value?.ip || 'AWX 自动分配'}:${deliveryForm.port || '自动端口'}`)
 const resultAddress = computed(() => connectionReady.value ? `${deliveredHost.value}:${deliveredPort.value}` : '交付接口未返回地址')
 const connectionUri = computed(() => connectionReady.value ? `mysql://root@${deliveredHost.value}:${deliveredPort.value}` : '')
@@ -918,16 +958,24 @@ watch(
 
 watch(deliveryForm, () => {
   precheckPassed.value = false
+  if (workbenchReady && !restoringWorkbench) persistWorkbench()
 }, { deep: true })
 
 watch(activeServiceKey, () => {
   hydrateServiceDefaults()
+  if (activeServiceKey.value) {
+    workbenchReady = false
+    restoreWorkbench()
+  } else {
+    workbenchReady = true
+  }
 })
 
 watch(activeView, (view, previousView) => {
   if (previousView === 'result' && view !== 'result' && credentialRevealed.value) {
     dismissCredential()
   }
+  if (workbenchReady && !restoringWorkbench) persistWorkbench()
 })
 
 watch(
@@ -942,9 +990,11 @@ hydrateServiceDefaults()
 onMounted(() => {
   if (route.query.preview === 'credential') {
     setupCredentialPreview()
+    workbenchReady = true
     return
   }
   loadDeliveryTargets()
+  restoreWorkbench()
 })
 onBeforeUnmount(stopPolling)
 
@@ -965,10 +1015,130 @@ function backToCatalog() {
   router.push({ name: 'ServiceCatalog' })
 }
 
+function selectFlowTab(view: FlowView) {
+  if (view === 'result' && !resultReady.value) return
+  activeView.value = view
+}
+
 function openDeliveryRecords() {
   router.push({ name: 'ServiceManagement' })
 }
 
+function workbenchStorageKey() {
+  return `xinfra:delivery-workbench:${currentName.value}:${activeServiceKey.value || 'catalog'}`
+}
+
+function persistWorkbench() {
+  if (!workbenchReady || !activeServiceKey.value) return
+  const snapshot: WorkbenchSnapshot = {
+    version: 1,
+    serviceKey: activeServiceKey.value,
+    activeView: activeView.value,
+    precheckPassed: precheckPassed.value,
+    running: running.value,
+    deliveryDone: deliveryDone.value,
+    deliveryFailed: deliveryFailed.value,
+    deploymentId: deploymentId.value,
+    deliveryError: deliveryError.value,
+    deliveredHost: deliveredHost.value,
+    deliveredPort: deliveredPort.value,
+    lastDeliveryStatus: lastDeliveryStatus.value,
+    deliveryLog: deliveryLog.value,
+    steps: steps.value,
+    form: {
+      instanceName: deliveryForm.instanceName,
+      version: deliveryForm.version,
+      mode: deliveryForm.mode,
+      spec: deliveryForm.spec,
+      storageGi: deliveryForm.storageGi,
+      port: deliveryForm.port,
+      charset: deliveryForm.charset,
+      collation: deliveryForm.collation,
+      lowerCaseTableNames: deliveryForm.lowerCaseTableNames,
+      timezone: deliveryForm.timezone,
+      dataDisk: deliveryForm.dataDisk,
+      targetHost: deliveryForm.targetHost,
+      maxConnections: deliveryForm.maxConnections,
+      redoCapacity: deliveryForm.redoCapacity,
+      flushLogAtCommit: deliveryForm.flushLogAtCommit,
+      syncBinlog: deliveryForm.syncBinlog,
+      ioCapacity: deliveryForm.ioCapacity,
+      longQueryTime: deliveryForm.longQueryTime,
+      binlogExpireSeconds: deliveryForm.binlogExpireSeconds,
+      maxBinlogSize: deliveryForm.maxBinlogSize,
+    },
+  }
+  try {
+    sessionStorage.setItem(workbenchStorageKey(), JSON.stringify(snapshot))
+  } catch {
+    // Session storage may be disabled; the backend task history remains available.
+  }
+}
+
+async function restoreWorkbench() {
+  let snapshot: WorkbenchSnapshot | undefined
+  try {
+    const raw = sessionStorage.getItem(workbenchStorageKey())
+    snapshot = raw ? JSON.parse(raw) as WorkbenchSnapshot : undefined
+  } catch {
+    snapshot = undefined
+  }
+
+  if (!snapshot || snapshot.version !== 1 || snapshot.serviceKey !== activeServiceKey.value) {
+    workbenchReady = true
+    return
+  }
+
+  restoringWorkbench = true
+  Object.assign(deliveryForm, snapshot.form)
+  deliveryForm.rootPassword = generateRootPassword()
+  precheckPassed.value = snapshot.precheckPassed
+  running.value = snapshot.running
+  deliveryDone.value = snapshot.deliveryDone
+  deliveryFailed.value = snapshot.deliveryFailed
+  deploymentId.value = snapshot.deploymentId
+  deliveryError.value = snapshot.deliveryError
+  deliveredHost.value = snapshot.deliveredHost
+  deliveredPort.value = snapshot.deliveredPort
+  lastDeliveryStatus.value = snapshot.lastDeliveryStatus
+  deliveryLog.value = snapshot.deliveryLog
+  steps.value = snapshot.steps?.length ? snapshot.steps : defaultSteps()
+  credentialRevealed.value = false
+  credentialDismissed.value = Boolean(snapshot.deploymentId)
+
+  if (snapshot.deploymentId) {
+    taskStateLoading.value = true
+    try {
+      const data = await deliveryApi.getTask(snapshot.deploymentId)
+      deliveredHost.value = data.task.target_host_ip || deliveredHost.value
+      deliveredPort.value = data.task.mysql_port || deliveredPort.value
+      lastDeliveryStatus.value = data.task.status
+      deliveryError.value = data.task.error_message || deliveryError.value
+      seenEventIds.value = new Set(data.events.map((event) => event.id))
+      applyDeliveryStatus(data.task.status, data.task.error_message || '')
+      if (isTerminalDeliveryStatus(data.task.status)) {
+        activeView.value = 'result'
+        stopPolling()
+      } else {
+        activeView.value = 'execution'
+        startTaskPolling(snapshot.deploymentId)
+      }
+    } catch (error) {
+      appendLog(`[restore] ${error instanceof Error ? error.message : '获取任务状态失败'}`)
+      running.value = true
+      activeView.value = 'execution'
+    } finally {
+      taskStateLoading.value = false
+    }
+  } else {
+    activeView.value = snapshot.activeView
+  }
+
+  restoringWorkbench = false
+  workbenchReady = true
+  persistWorkbench()
+}
+
 function hydrateServiceDefaults() {
   const service = activeService.value
   if (!service) return
@@ -976,8 +1146,12 @@ function hydrateServiceDefaults() {
   deliveryForm.instanceName = `${prefix}-${currentName.value}-billing-02`
   deliveryForm.version = service.versions[0] || ''
   deliveryForm.mode = service.modes[1]?.value || service.modes[0]?.value || 'single'
-  deliveryForm.spec = service.specs[1] || service.specs[0] || ''
-  deliveryForm.storageGi = parseStorageGi(service.disks[1] || service.disks[0] || '50 GB')
+  deliveryForm.spec = service.key === 'mysql'
+    ? (service.specs[0] || '')
+    : (service.specs[1] || service.specs[0] || '')
+  deliveryForm.storageGi = service.key === 'mysql'
+    ? parseStorageGi(service.disks[0] || '20 GB')
+    : parseStorageGi(service.disks[1] || service.disks[0] || '50 GB')
   deliveryForm.port = service.defaultPort || undefined
   deliveryForm.charset = service.charsets[0] || ''
   deliveryForm.collation = collationMap[deliveryForm.charset]?.[0] || ''
@@ -998,19 +1172,30 @@ function hydrateServiceDefaults() {
 }
 
 function resetWorkbench() {
+  clearWorkbenchSnapshot()
   hydrateServiceDefaults()
   activeView.value = 'config'
   ElMessage.success('交付工作台已重置')
 }
 
+function clearWorkbenchSnapshot() {
+  try {
+    sessionStorage.removeItem(workbenchStorageKey())
+  } catch {
+    // Session storage may be disabled.
+  }
+}
+
 function resetExecutionState() {
   stopPolling()
+  taskStateLoading.value = false
   precheckPassed.value = false
   running.value = false
   deliveryDone.value = false
   deliveryFailed.value = false
   credentialRevealed.value = false
   credentialDismissed.value = false
+  revealedCredentials.value = []
   deliveryError.value = ''
   lastDeliveryStatus.value = ''
   canceling.value = false
@@ -1042,8 +1227,13 @@ function defaultSteps(): DeliveryStep[] {
   return copy.map(([name, desc]) => ({ name, desc, state: 'pending' as StepState }))
 }
 
-function precheck() {
+async function precheck() {
   if (!validateDeliveryForm()) return
+  const businessLineId = businessLineStore.current?.id
+  if (!businessLineId) {
+    ElMessage.warning('请先选择业务线')
+    return
+  }
   if (!selectedTargetId.value) {
     ElMessage.warning('当前没有可用的 AWX 部署模板，请联系平台管理员配置')
     return
@@ -1052,6 +1242,18 @@ function precheck() {
     ElMessage.warning('手动端口必须在 13306–13999 范围内')
     return
   }
+  try {
+    const conflict = await findInstanceNameConflict(businessLineId, normalizeDNSLabel(deliveryForm.instanceName))
+    if (conflict) {
+      precheckPassed.value = false
+      ElMessage.error(conflict)
+      return
+    }
+  } catch (error) {
+    precheckPassed.value = false
+    ElMessage.error(error instanceof Error ? `实例名称可用性检查失败：${error.message}` : '实例名称可用性检查失败')
+    return
+  }
   precheckPassed.value = true
   deliveryFailed.value = false
   deliveryLog.value = [
@@ -1063,6 +1265,33 @@ function precheck() {
   ElMessage.success('预检查通过，可以创建交付任务')
 }
 
+async function findInstanceNameConflict(businessLineId: number, instanceName: string) {
+  const occupiedStatuses = new Set([
+    'pending',
+    'validating',
+    'dispatching',
+    'running',
+    'registering',
+    'finished',
+    'register_failed',
+    'canceling',
+    'rollback_pending',
+    'rolling_back',
+    'rollback_failed',
+  ])
+  const [tasks, services] = await Promise.all([
+    deliveryApi.listTasks({ businessLineId, component: 'mysql' }),
+    deliveryApi.listMySQLServices(businessLineId),
+  ])
+  if (tasks.some((task) => task.instance_name === instanceName && occupiedStatuses.has(task.status))) {
+    return `实例名称 ${instanceName} 已被运行中或尚未释放的交付任务占用`
+  }
+  if (services.some((service) => service.name === instanceName)) {
+    return `实例名称 ${instanceName} 已被现有 MySQL 实例占用`
+  }
+  return ''
+}
+
 async function createTask() {
   if (!precheckPassed.value) {
     ElMessage.warning('请先执行预检查')
@@ -1091,18 +1320,20 @@ async function createTask() {
   try {
     const task = await deliveryApi.createMySQL(mysqlDeliveryPayload(businessLineId))
     deploymentId.value = task.id
-    deliveryCredentials.set(task.id, deliveryForm.rootPassword)
-    deliveryCredentialStates.set(task.id, { revealed: false, dismissed: false })
-    upsertDeliveryHistory(task.id, task.status, task.error_message || '', task.created_at, deliveryForm.rootPassword)
+    deliveryForm.rootPassword = ''
+    upsertDeliveryHistory(task.id, task.status, task.error_message || '', task.created_at)
     deliveryLog.value += `\n[task] ${task.id} created by ${currentName.value}`
     applyDeliveryStatus(task.status, '')
     startTaskPolling(task.id)
+    persistWorkbench()
     ElMessage.success('交付任务已创建')
   } catch (error) {
     running.value = false
     deliveryFailed.value = true
+    lastDeliveryStatus.value = 'execution_failed'
+    deliveryError.value = error instanceof Error ? error.message : '创建交付任务失败'
     activeView.value = 'result'
-    ElMessage.error(error instanceof Error ? error.message : '创建交付任务失败')
+    ElMessage.error(deliveryError.value)
   }
 }
 
@@ -1191,6 +1422,7 @@ async function pollTask(id: string) {
       stopPolling()
       activeView.value = 'result'
     }
+    persistWorkbench()
   } catch (error) {
     appendLog(`[poll] ${error instanceof Error ? error.message : '获取任务状态失败'}`)
   }
@@ -1276,9 +1508,8 @@ function setupCredentialPreview() {
   deliveredPort.value = 13306
   credentialRevealed.value = false
   credentialDismissed.value = false
-  deliveryCredentials.set(deploymentId.value, deliveryForm.rootPassword)
-  deliveryCredentialStates.set(deploymentId.value, { revealed: false, dismissed: false })
-  upsertDeliveryHistory(deploymentId.value, 'finished', '', new Date().toISOString(), deliveryForm.rootPassword)
+  revealedCredentials.value = []
+  upsertDeliveryHistory(deploymentId.value, 'finished', '', new Date().toISOString())
   if (deliveryHistory.value.length < 3) {
     addPreviewHistoryItems()
   }
@@ -1317,10 +1548,29 @@ function normalizeDNSLabel(value: string) {
 }
 
 function generateRootPassword() {
-  const alphabet = 'ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz23456789!@#$%^&*_-+='
-  const values = new Uint32Array(24)
-  crypto.getRandomValues(values)
-  return Array.from(values, (value) => alphabet[value % alphabet.length]).join('')
+  const groups = [
+    'ABCDEFGHJKLMNPQRSTUVWXYZ',
+    'abcdefghijkmnopqrstuvwxyz',
+    '23456789',
+    '!@#$%^&*_-+=',
+  ]
+  const alphabet = groups.join('')
+  const pick = (characters: string) => {
+    const value = new Uint32Array(1)
+    crypto.getRandomValues(value)
+    return characters[value[0] % characters.length]
+  }
+  const password = groups.map(pick)
+  while (password.length < 24) password.push(pick(alphabet))
+  for (let index = password.length - 1; index > 0; index--) {
+    const value = new Uint32Array(1)
+    crypto.getRandomValues(value)
+    const swapIndex = value[0] % (index + 1)
+    const current = password[index]
+    password[index] = password[swapIndex]
+    password[swapIndex] = current
+  }
+  return password.join('')
 }
 
 function rootPasswordValidationError(value: string) {
@@ -1339,33 +1589,55 @@ function regenerateRootPassword() {
   ElMessage.success('已生成新的 root 密码')
 }
 
-function revealCredential() {
+function regenerateInstanceName() {
+  const prefix = activeServiceKey.value === 'mysql' ? 'mysql' : 'service'
+  const businessLine = normalizeDNSLabel(currentName.value)
+  const alphabet = 'abcdefghijklmnopqrstuvwxyz0123456789'
+  const values = new Uint32Array(6)
+  crypto.getRandomValues(values)
+  const suffix = Array.from(values, (value) => alphabet[value % alphabet.length]).join('')
+  deliveryForm.instanceName = normalizeDNSLabel(`${prefix}-${businessLine}-${suffix}`)
+  precheckPassed.value = false
+  ElMessage.success('已生成新的实例名称，请执行预检查确认可用')
+}
+
+async function revealCredential() {
   if (!credentialEligible.value) return
-  credentialRevealed.value = true
-  if (deploymentId.value) {
-    deliveryCredentialStates.set(deploymentId.value, { revealed: true, dismissed: false })
+  credentialRevealing.value = true
+  try {
+    if (deploymentId.value === 'PREVIEW-CREDENTIAL') {
+      revealedCredentials.value = [{ username: 'root', host: 'localhost', password: deliveryForm.rootPassword }]
+    } else {
+      revealedCredentials.value = await deliveryApi.revealCredentials(deploymentId.value)
+    }
+    if (!revealedRootCredential.value) {
+      throw new Error('后端未返回 root 凭证')
+    }
+    credentialRevealed.value = true
+  } catch (error) {
+    credentialDismissed.value = true
+    ElMessage.error(error instanceof Error ? error.message : '一次性凭证领取失败')
+  } finally {
+    credentialRevealing.value = false
   }
 }
 
 function dismissCredential() {
   credentialRevealed.value = false
   credentialDismissed.value = true
-  if (deploymentId.value) {
-    deliveryCredentialStates.set(deploymentId.value, { revealed: false, dismissed: true })
-    deliveryCredentials.delete(deploymentId.value)
-    markHistoryCredentialConsumed(deploymentId.value)
-  }
+  revealedCredentials.value = []
 }
 
 function downloadCredentialFile() {
-  if (!credentialRevealed.value || !deliveryForm.rootPassword) return
+  const password = revealedRootCredential.value?.password
+  if (!credentialRevealed.value || !password) return
   const content = [
     '# XInfra MySQL delivery credential',
     `instance=${deliveryForm.instanceName}`,
     `host=${deliveredHost.value}`,
     `port=${deliveredPort.value || ''}`,
     'username=root',
-    `password=${deliveryForm.rootPassword}`,
+    `password=${password}`,
   ].join('\n') + '\n'
   const url = URL.createObjectURL(new Blob([content], { type: 'text/plain;charset=utf-8' }))
   const link = document.createElement('a')
@@ -1380,7 +1652,14 @@ function loadDeliveryHistory(): DeliveryHistoryItem[] {
   try {
     const raw = localStorage.getItem('xinfra:mysql-delivery-history')
     const parsed = raw ? JSON.parse(raw) : []
-    return Array.isArray(parsed) ? parsed.slice(0, 12) : []
+    if (!Array.isArray(parsed)) return []
+    const sanitized = parsed.slice(0, 12).map((item) => {
+      if (!item || typeof item !== 'object') return item
+      const { credential: _credential, credentialConsumed: _credentialConsumed, ...history } = item
+      return history
+    })
+    localStorage.setItem('xinfra:mysql-delivery-history', JSON.stringify(sanitized))
+    return sanitized
   } catch {
     return []
   }
@@ -1390,7 +1669,7 @@ function persistDeliveryHistory() {
   localStorage.setItem('xinfra:mysql-delivery-history', JSON.stringify(deliveryHistory.value.slice(0, 12)))
 }
 
-function upsertDeliveryHistory(id: string, status: string, errorMessage = '', createdAt?: string, credential?: string) {
+function upsertDeliveryHistory(id: string, status: string, errorMessage = '', createdAt?: string) {
   if (!id) return
   const existing = deliveryHistory.value.find((item) => item.id === id)
   const item: DeliveryHistoryItem = {
@@ -1406,8 +1685,6 @@ function upsertDeliveryHistory(id: string, status: string, errorMessage = '', cr
     errorMessage,
     createdAt: createdAt || existing?.createdAt || new Date().toISOString(),
     updatedAt: new Date().toISOString(),
-    credential: credential ?? existing?.credential,
-    credentialConsumed: existing?.credentialConsumed ?? false,
   }
   deliveryHistory.value = [item, ...deliveryHistory.value.filter((entry) => entry.id !== id)]
     .sort((a, b) => Date.parse(b.updatedAt) - Date.parse(a.updatedAt))
@@ -1415,16 +1692,6 @@ function upsertDeliveryHistory(id: string, status: string, errorMessage = '', cr
   persistDeliveryHistory()
 }
 
-function markHistoryCredentialConsumed(id: string) {
-  const item = deliveryHistory.value.find((entry) => entry.id === id)
-  if (!item) return
-  if (!item.credential && !deliveryCredentials.has(id)) return
-  item.credentialConsumed = true
-  item.credential = undefined
-  deliveryHistory.value = [...deliveryHistory.value]
-  persistDeliveryHistory()
-}
-
 function addPreviewHistoryItems() {
   const now = Date.now()
   const previewItems: DeliveryHistoryItem[] = [
@@ -1441,8 +1708,6 @@ function addPreviewHistoryItems() {
       errorMessage: '',
       createdAt: new Date(now - 18 * 60 * 1000).toISOString(),
       updatedAt: new Date(now - 12 * 60 * 1000).toISOString(),
-      credential: 'preview-r0ot-Password!2026',
-      credentialConsumed: false,
     },
     {
       id: 'PREVIEW-FAILED',
@@ -1457,18 +1722,11 @@ function addPreviewHistoryItems() {
       errorMessage: '目标主机资源预检查未通过',
       createdAt: new Date(now - 95 * 60 * 1000).toISOString(),
       updatedAt: new Date(now - 92 * 60 * 1000).toISOString(),
-      credentialConsumed: true,
     },
   ]
   deliveryHistory.value = [...deliveryHistory.value, ...previewItems]
     .filter((item, index, items) => items.findIndex((entry) => entry.id === item.id) === index)
     .slice(0, 12)
-  previewItems.forEach((item) => {
-    if (item.credential && !item.credentialConsumed) {
-      deliveryCredentials.set(item.id, item.credential)
-      deliveryCredentialStates.set(item.id, { revealed: false, dismissed: false })
-    }
-  })
   persistDeliveryHistory()
 }
 
@@ -1763,6 +2021,17 @@ h4 {
   background: var(--accent-dim);
 }
 
+.flow-tab:disabled,
+.flow-tab.disabled {
+  cursor: not-allowed;
+  opacity: 0.52;
+}
+
+.flow-tab:disabled:hover {
+  border-color: var(--line);
+  background: var(--bg-panel-2);
+}
+
 .workbench-grid {
   display: grid;
   grid-template-columns: minmax(0, 1.18fr) minmax(360px, 0.82fr);
@@ -1832,6 +2101,19 @@ h4 {
   font-size: 11.5px;
 }
 
+.instance-name-editor {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) auto;
+  gap: 6px;
+  align-items: center;
+}
+
+.random-name-button {
+  height: 32px;
+  padding: 0 8px;
+  white-space: nowrap;
+}
+
 .form-field :deep(.el-select),
 .form-field :deep(.el-input-number) {
   width: 100%;