diff --git a/src/utils/creatorImpersonation.ts b/src/utils/creatorImpersonation.ts
index f3f9955..b6d698a 100644
--- a/src/utils/creatorImpersonation.ts
+++ b/src/utils/creatorImpersonation.ts
@@ -11,17 +11,22 @@ import { ref } from 'vue'
  */
 const STORAGE_KEY = 'creator-center:impersonate-id'
 
-function readStored(): number | null {
+/**
+ * 代看目标按**字符串**存：创作者 id 是雪花 id（19 位），
+ * 用 Number 过一遍会被 JS 四舍五入，请求头就会带一个不存在的 id（见 api-phase1.md §0）。
+ */
+function readStored(): string | null {
   const raw = localStorage.getItem(STORAGE_KEY)
-  const value = raw ? Number(raw) : NaN
-  return Number.isFinite(value) && value > 0 ? value : null
+  const value = (raw || '').trim()
+  return value && value !== '0' ? value : null
 }
 
-export const impersonateCreatorId = ref<number | null>(readStored())
+export const impersonateCreatorId = ref<string | null>(readStored())
 
-export function setImpersonateCreatorId(id: number | null) {
-  impersonateCreatorId.value = id
-  if (id) localStorage.setItem(STORAGE_KEY, String(id))
+export function setImpersonateCreatorId(id: string | number | null) {
+  const value = id === null || id === undefined || id === '' ? null : String(id)
+  impersonateCreatorId.value = value
+  if (value) localStorage.setItem(STORAGE_KEY, value)
   else localStorage.removeItem(STORAGE_KEY)
 }
 
diff --git a/src/views/contentManagement/EpisodeManagementView.vue b/src/views/contentManagement/EpisodeManagementView.vue
index fb67003..5db5f08 100644
--- a/src/views/contentManagement/EpisodeManagementView.vue
+++ b/src/views/contentManagement/EpisodeManagementView.vue
@@ -55,7 +55,8 @@ const selectedDrama = computed(() => dramas.value.find((item) => item.id === sel
 async function loadDramas() {
   const res = await pageDramasApi({ pageIndex: 1, pageSize: 200 })
   dramas.value = res.data?.list || []
-  const fromQuery = Number(route.query.drama)
+  // 剧 id 是字符串（雪花 id 过 Number 会被四舍五入），这里按字符串比较
+  const fromQuery = route.query.drama ? String(route.query.drama) : ''
   if (fromQuery && dramas.value.some((item) => item.id === fromQuery)) {
     selectedDramaId.value = fromQuery
   } else if (!selectedDramaId.value && dramas.value.length) {
diff --git a/src/views/creator-center/composables/useDramaEdit.js b/src/views/creator-center/composables/useDramaEdit.js
index efe7b08..9dbcbb4 100644
--- a/src/views/creator-center/composables/useDramaEdit.js
+++ b/src/views/creator-center/composables/useDramaEdit.js
@@ -42,7 +42,8 @@ function writeSession(key, value) {
 export function useDramaEdit() {
   const { ensureAccess, impersonating } = useCreatorAccess()
   const route = useRoute()
-  const dramaId = Number(route.params.id)
+  // 作品 id 是字符串（雪花 id 过 Number 会被四舍五入），按字符串比对
+  const dramaId = route.params.id ? String(route.params.id) : ''
 
   const loading = ref(false)
   const drama = ref(null)
diff --git a/src/views/permission/composables/useMenuManagement.js b/src/views/permission/composables/useMenuManagement.js
index 1bf197d..f45b3bd 100644
--- a/src/views/permission/composables/useMenuManagement.js
+++ b/src/views/permission/composables/useMenuManagement.js
@@ -47,7 +47,9 @@ export function useMenuManagement() {
   const treeData = computed(() => mapNodes(menuTree.value))
 
   const parentOptions = computed(() => {
-    const options = [{ id: 0, label: '顶级菜单' }]
+    // 顶级菜单哨兵跟接口的 parentId 一样用字符串 "0"：菜单 id 是字符串，
+    // 数字 0 会在下拉里对不上、回显成裸 "0"
+    const options = [{ id: '0', label: '顶级菜单' }]
     const walk = (nodes, depth) => {
       ;(nodes || []).forEach((node) => {
         if (node.type !== 'BUTTON') {
@@ -73,7 +75,7 @@ export function useMenuManagement() {
     }
   }
 
-  function resetForm(parentId = 0) {
+  function resetForm(parentId = '0') {
     Object.assign(form, {
       id: null,
       parentId,
@@ -94,7 +96,7 @@ export function useMenuManagement() {
     const raw = node.raw || {}
     Object.assign(form, {
       id: raw.id,
-      parentId: raw.parentId ?? 0,
+      parentId: raw.parentId ?? '0',
       title: raw.meta?.title || '',
       routePath: raw.path || '',
       routeName: raw.name || '',
@@ -114,7 +116,7 @@ export function useMenuManagement() {
       return ElMessage.warning('请填写对应路由')
     }
     const payload = {
-      parentId: form.parentId || 0,
+      parentId: form.parentId || '0',
       title: form.title.trim(),
       routePath: form.routePath.trim(),
       routeName: form.routeName.trim(),