diff --git a/src/modules/loading-lists/pages/PreloadPlanDetailView.lifecycle.test.ts b/src/modules/loading-lists/pages/PreloadPlanDetailView.lifecycle.test.ts
new file mode 100644
index 00000000..02deec05
--- /dev/null
+++ b/src/modules/loading-lists/pages/PreloadPlanDetailView.lifecycle.test.ts
@@ -0,0 +1,131 @@
+import { flushPromises, shallowMount } from '@vue/test-utils'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+import { ElMessage } from 'element-plus'
+import { ApiResponseError, http } from '@/shared/api/http'
+import { getPreloadPlan } from '../api/platformLoadingLists'
+import PreloadPlanDetailView from './PreloadPlanDetailView.vue'
+
+const routerReplace = vi.hoisted(() => vi.fn())
+vi.mock('vue-router', () => ({
+  useRoute: () => ({ params: { planId: '1900000000000000001' }, query: { warehouseId: '1900000000000000002' } }),
+  useRouter: () => ({ replace: routerReplace, push: vi.fn(), back: vi.fn() }),
+}))
+vi.mock('@/core/access/accessPreview', () => ({ useAccessPreviewStore: () => ({ can: () => true }) }))
+vi.mock('../api/platformLoadingLists', () => ({
+  confirmPreloadPlan: vi.fn(),
+  getPreloadPlan: vi.fn(),
+  updateLoadingItemWarehouseRemark: vi.fn(),
+  updatePreloadTransport: vi.fn(),
+}))
+
+async function mountView() {
+  const wrapper = shallowMount(PreloadPlanDetailView, {
+    global: {
+      stubs: {
+        AdminPage: { template: '<main><slot /></main>' },
+        LoadingListDetailDrawer: { name: 'LoadingListDetailDrawer', props: ['error', 'loading'], template: '<section />' },
+        OperationErrorToast: true,
+        AppDialog: true,
+      },
+    },
+  })
+  await flushPromises()
+  return wrapper
+}
+
+function drawerError(wrapper: Awaited<ReturnType<typeof mountView>>) {
+  return wrapper.findComponent({ name: 'LoadingListDetailDrawer' }).props('error')
+}
+
+function lifecycle(detailResource: 'PRELOAD' | 'LOADING_LIST', planStatus: string) {
+  return { code: '200', message: 'success', data: { planId: '1900000000000000001', detailResource, planStatus } }
+}
+
+describe('PreloadPlanDetailView lifecycle handoff', () => {
+  beforeEach(() => {
+    vi.restoreAllMocks()
+    vi.clearAllMocks()
+    routerReplace.mockResolvedValue(undefined)
+  })
+
+  it('replaces the current tab after authoritative lifecycle resolution', async () => {
+    vi.spyOn(http, 'get').mockResolvedValue(lifecycle('LOADING_LIST', 'COMPLETED'))
+    const message = vi.spyOn(ElMessage, 'success').mockImplementation(() => undefined as never)
+
+    const wrapper = await mountView()
+
+    expect(http.get).toHaveBeenCalledWith(
+      '/platform/v1/first-leg/loading-plans/1900000000000000001/lifecycle',
+      { params: { warehouseId: '1900000000000000002' } },
+    )
+    expect(getPreloadPlan).not.toHaveBeenCalled()
+    expect(routerReplace).toHaveBeenCalledTimes(1)
+    expect(routerReplace).toHaveBeenCalledWith({
+      name: 'loading-list-detail',
+      params: { planId: '1900000000000000001' },
+      query: { warehouseId: '1900000000000000002' },
+    })
+    expect(message).toHaveBeenCalledWith('装柜已完成，已切换至装柜清单详情')
+    expect(drawerError(wrapper)).toBeNull()
+    expect(wrapper.findComponent({ name: 'LoadingListDetailDrawer' }).props('loading')).toBe(false)
+  })
+
+  it('loads preload detail only while the lifecycle remains PRELOAD', async () => {
+    vi.spyOn(http, 'get').mockResolvedValue(lifecycle('PRELOAD', 'LOADING'))
+    vi.mocked(getPreloadPlan).mockResolvedValue({
+      summary: {
+        status: 'LOADING', containerNo: null,
+        readiness: { preloadPushed: true, pdaTaskStatus: null },
+      },
+      items: [], histories: [],
+    } as never)
+
+    const wrapper = await mountView()
+
+    expect(getPreloadPlan).toHaveBeenCalledWith('1900000000000000001', '1900000000000000002')
+    expect(routerReplace).not.toHaveBeenCalled()
+    expect(drawerError(wrapper)).toBeNull()
+  })
+
+  it('shows A0404 only when lifecycle resolution confirms the plan is absent', async () => {
+    vi.spyOn(http, 'get').mockRejectedValue(new ApiResponseError('装柜计划不存在', 'A0404', 404, undefined, 'request-lifecycle', 'trace-lifecycle'))
+
+    const wrapper = await mountView()
+
+    expect(getPreloadPlan).not.toHaveBeenCalled()
+    expect(routerReplace).not.toHaveBeenCalled()
+    expect(drawerError(wrapper)).toMatchObject({ code: 'A0404', requestId: 'request-lifecycle', traceId: 'trace-lifecycle', message: '装柜计划不存在' })
+  })
+
+  it.each([
+    ['A0403', 403, 'request-forbidden', 'trace-forbidden'],
+    ['S0503', 503, 'request-unavailable', 'trace-unavailable'],
+  ])('does not swallow a lifecycle %s error', async (code, status, requestId, traceId) => {
+    vi.spyOn(http, 'get').mockRejectedValue(new ApiResponseError('装柜计划解析失败', code, status, undefined, requestId, traceId))
+
+    const wrapper = await mountView()
+
+    expect(getPreloadPlan).not.toHaveBeenCalled()
+    expect(routerReplace).not.toHaveBeenCalled()
+    expect(drawerError(wrapper)).toMatchObject({ code, requestId, traceId })
+  })
+
+  it('surfaces a network failure without guessing from another detail endpoint', async () => {
+    vi.spyOn(http, 'get').mockRejectedValue(new Error('Network Error'))
+
+    const wrapper = await mountView()
+
+    expect(getPreloadPlan).not.toHaveBeenCalled()
+    expect(routerReplace).not.toHaveBeenCalled()
+    expect(drawerError(wrapper)).toMatchObject({ message: '预装清单详情加载失败，请稍后重试' })
+  })
+
+  it('does not redirect for an internally inconsistent lifecycle payload', async () => {
+    vi.spyOn(http, 'get').mockResolvedValue(lifecycle('LOADING_LIST', 'LOADING'))
+
+    const wrapper = await mountView()
+
+    expect(routerReplace).not.toHaveBeenCalled()
+    expect(drawerError(wrapper)).toMatchObject({ code: 'MODE_STATUS_MISMATCH' })
+  })
+})
diff --git a/src/modules/loading-lists/pages/PreloadPlanDetailView.test.ts b/src/modules/loading-lists/pages/PreloadPlanDetailView.test.ts
index fa75c615..1e0ae5ed 100644
--- a/src/modules/loading-lists/pages/PreloadPlanDetailView.test.ts
+++ b/src/modules/loading-lists/pages/PreloadPlanDetailView.test.ts
@@ -20,6 +20,17 @@ describe('PreloadPlanDetailView prototype contract', () => {
     expect(source).toContain('MODE_STATUS_MISMATCH')
   })
 
+  it('switches a completed preload lifecycle to the confirmed detail without swallowing unrelated errors', () => {
+    expect(source).toContain('/loading-plans/${encodeURIComponent(planId.value)}/lifecycle')
+    expect(source).toContain("lifecycle.detailResource === 'LOADING_LIST'")
+    expect(source).toContain("lifecycle.planStatus !== 'COMPLETED'")
+    expect(source).toContain("router.replace({ name: 'loading-list-detail'")
+    expect(source).toContain('装柜已完成，已切换至装柜清单详情')
+    expect(source).not.toContain("preloadError.code !== 'A0404'")
+    expect(source).not.toContain('getConfirmedLoadingList')
+    expect(source).not.toContain("router.push({ name: 'loading-list-detail'")
+  })
+
   it('uses the real optimistic-lock transport endpoint without inventing note writes', () => {
     expect(source).toContain('updatePreloadTransport')
     expect(source).toContain('expectedVersion: detail.value.summary.version')
diff --git a/src/modules/loading-lists/pages/PreloadPlanDetailView.vue b/src/modules/loading-lists/pages/PreloadPlanDetailView.vue
index 661a51a4..df31bfc5 100644
--- a/src/modules/loading-lists/pages/PreloadPlanDetailView.vue
+++ b/src/modules/loading-lists/pages/PreloadPlanDetailView.vue
@@ -7,7 +7,7 @@ import ApiErrorMeta from '@/shared/components/ApiErrorMeta.vue'
 import OperationErrorToast from '@/shared/components/OperationErrorToast.vue'
 import AppDialog from '@/shared/components/AppDialog.vue'
 import LoadErrorState from '@/shared/components/LoadErrorState.vue'
-import { getApiErrorDetails, type ApiErrorDetails } from '@/shared/api/http'
+import { getApiErrorDetails, http, unwrapApiResponse, type ApiEnvelope, type ApiErrorDetails } from '@/shared/api/http'
 import { useAccessPreviewStore } from '@/core/access/accessPreview'
 import LoadingListDetailDrawer from '../components/LoadingListDetailDrawer.vue'
 import { confirmPreloadPlan, getPreloadPlan, updateLoadingItemWarehouseRemark, updatePreloadTransport, type LoadingDetail, type LoadingItem, type PreloadSummary } from '../api/platformLoadingLists'
@@ -36,6 +36,15 @@ const remarkOperationId = ref('')
 let loadSequence = 0
 const planId = computed(() => String(route.params.planId || ''))
 const warehouseId = computed(() => typeof route.query.warehouseId === 'string' ? route.query.warehouseId : '')
+type LoadingPlanLifecycle = { planId: string | number; planStatus: string; detailResource: 'PRELOAD' | 'LOADING_LIST' }
+
+async function resolveLoadingPlanLifecycle() {
+  const response = await http.get<ApiEnvelope<LoadingPlanLifecycle>, ApiEnvelope<LoadingPlanLifecycle>>(
+    `/platform/v1/first-leg/loading-plans/${encodeURIComponent(planId.value)}/lifecycle`,
+    { params: { warehouseId: warehouseId.value } },
+  )
+  return unwrapApiResponse(response)
+}
 const canEdit = computed(() => access.can('platform:firstleg:preload:edit'))
 const canCorrectTransport = computed(() => {
   const summary = detail.value?.summary
@@ -76,6 +85,21 @@ async function loadDetail() {
   loading.value = true
   error.value = null
   try {
+    const lifecycle = await resolveLoadingPlanLifecycle()
+    if (sequence !== loadSequence) return
+    if (lifecycle.detailResource === 'LOADING_LIST') {
+      if (lifecycle.planStatus !== 'COMPLETED') {
+        error.value = { code: 'MODE_STATUS_MISMATCH', message: '装柜计划阶段异常，暂时无法切换详情，请稍后重试。' }
+        return
+      }
+      await router.replace({ name: 'loading-list-detail', params: { planId: planId.value }, query: { warehouseId: warehouseId.value } })
+      if (sequence === loadSequence) ElMessage.success('装柜已完成，已切换至装柜清单详情')
+      return
+    }
+    if (lifecycle.detailResource !== 'PRELOAD') {
+      error.value = { code: 'MODE_STATUS_MISMATCH', message: '无法识别当前装柜计划阶段，请稍后重试。' }
+      return
+    }
     const result = await getPreloadPlan(planId.value, warehouseId.value)
     if (sequence !== loadSequence) return
     if (!['EDITING', 'LOADING'].includes(result.summary.status)) {