开放客服 kuaishou-lewan 换绑角色权限

与刷新角色一致，换绑改用 canOperateAssistedTask，
不开放重试/发货/退号等完整任务生命周期能力。

apps/backend/src/services/admin/admin-read-service.ts

@@ -354,7 +354,7 @@ export async function getAdminTaskDetail(
         String(task.executor_key || '').trim() === 'kuaishou_ct_assisted' &&
         Number(kuaishouCloudFulfillment?.binding.vnId || 0) > 0,
       canRebindKuaishouCloudRole:
-        viewerContext.canManageTaskLifecycle &&
+        viewerContext.canOperateAssistedTask &&
         String(task.executor_key || '').trim() === 'kuaishou_ct_assisted' &&
         canRebindKuaishouCloudRoleStatus(task.task_status) &&
         String(kuaishouCloudFulfillment?.dispatch.status || 'pending').trim() !== 'success' &&

apps/backend/src/services/admin/admin-read-shared-helpers.test.ts

@@ -43,9 +43,23 @@ test('createAdminViewerContext lets support operate vouchers without lifecycle p
   const viewerContext = createAdminViewerContext({ role: 'support' })
 
   assert.equal(viewerContext.canOperateKuaishouIndustryVoucher, true)
+  assert.equal(viewerContext.canOperateAssistedTask, true)
   assert.equal(viewerContext.canManageTaskLifecycle, false)
 })
 
+test('createAdminViewerContext lets support rebind-assisted actions without full lifecycle', () => {
+  const support = createAdminViewerContext({ role: 'support' })
+  const operator = createAdminViewerContext({ role: 'operator' })
+
+  // 客服：可协助换绑/刷新角色，不可管理任务生命周期（重试/发货/退号等）
+  assert.equal(support.canOperateAssistedTask, true)
+  assert.equal(support.canManageTaskLifecycle, false)
+
+  // 运营：两者皆可
+  assert.equal(operator.canOperateAssistedTask, true)
+  assert.equal(operator.canManageTaskLifecycle, true)
+})
+
 test('mapKuaishouCloudFulfillmentContext exposes cloud account display labels', () => {
   const flow = mapKuaishouCloudFulfillmentContext(
     {

apps/backend/src/services/admin/write/kuaishou-cloud-actions.ts

@@ -210,7 +210,8 @@ export async function rebindAdminTaskKuaishouCloudRole(
   const task = await getRequiredTask(taskId)
   const viewerContext = createAdminViewerContext(session)
 
-  if (!viewerContext.canManageTaskLifecycle) {
+  // 与刷新角色一致：客服可换绑协助处理 UID 绑错，不开放完整任务生命周期
+  if (!viewerContext.canOperateAssistedTask) {
     throw createHttpError('当前账号没有权限换绑角色', {
       statusCode: 403,
       errorCode: 'admin_task_rebind_kuaishou_cloud_forbidden',