diff --git a/frontend/src/App.vue b/frontend/src/App.vue
index 84d4ac9..15857dc 100644
--- a/frontend/src/App.vue
+++ b/frontend/src/App.vue
@@ -295,7 +295,7 @@ onMounted(() => {
 
 function openDifyAdmin() {
   // Dify 管理后台运行在 3000 端口
-  window.open('http://localhost:3000', '_blank')
+  window.open('http://150.5.135.143:3000', '_blank')
   showMobileMenu.value = false
 }
 
diff --git a/frontend/src/composables/usePosterWorkspace.ts b/frontend/src/composables/usePosterWorkspace.ts
index 26db658..7770d3d 100644
--- a/frontend/src/composables/usePosterWorkspace.ts
+++ b/frontend/src/composables/usePosterWorkspace.ts
@@ -10,6 +10,7 @@
 import { ref, computed, watch, onMounted } from 'vue'
 import { useRouter, useRoute } from 'vue-router'
 import api from '@/utils/api'
+import { useAuth } from '@/composables/useAuth'
 
 export interface PosterTheme {
   primary: string
@@ -172,6 +173,7 @@ function normalizeFormat(draft: PosterDraft) {
 export function usePosterWorkspace() {
   const router = useRouter()
   const route = useRoute()
+  const { user } = useAuth()
 
   // ── 核心状态 ──────────────────────────────
   const recordId = ref<number | null>(null)
@@ -180,9 +182,23 @@ export function usePosterWorkspace() {
   const restored = ref(false)
 
   // ── 持久化 Key ────────────────────────────
-  const STORAGE_KEY = computed(() =>
-    recordId.value ? `poster_ws_draft_${recordId.value}` : 'poster_ws_draft_new'
-  )
+  function getStorageKey(targetRecordId: number | null = recordId.value): string {
+    if (!user.value?.id) return ''
+    const userId = encodeURIComponent(user.value.id)
+    return `poster_ws_draft_${userId}_${targetRecordId ?? 'new'}`
+  }
+
+  const STORAGE_KEY = computed(() => getStorageKey())
+
+  // 旧版草稿键没有用户维度，无法安全判断归属，直接清理以避免跨账号恢复。
+  try {
+    for (let index = localStorage.length - 1; index >= 0; index--) {
+      const key = localStorage.key(index)
+      if (key && /^poster_ws_draft_(?:new|\d+)$/.test(key)) {
+        localStorage.removeItem(key)
+      }
+    }
+  } catch { /* ignore */ }
 
   /** 需要持久化的字段（排除瞬态数据） */
   function getPersistableDraft(): Partial<PosterDraft> {
@@ -231,7 +247,9 @@ export function usePosterWorkspace() {
   // ── 持久化到 localStorage ─────────────────
   function persistDraft() {
     try {
-      localStorage.setItem(STORAGE_KEY.value, JSON.stringify(getPersistableDraft()))
+      const key = STORAGE_KEY.value
+      if (!key) return
+      localStorage.setItem(key, JSON.stringify(getPersistableDraft()))
     } catch { /* quota exceeded, ignore */ }
   }
 
@@ -241,7 +259,9 @@ export function usePosterWorkspace() {
   // ── 从 localStorage 恢复 ─────────────────
   function tryRestoreLocal(): boolean {
     try {
-      const saved = localStorage.getItem(STORAGE_KEY.value)
+      const key = STORAGE_KEY.value
+      if (!key) return false
+      const saved = localStorage.getItem(key)
       if (saved) {
         const parsed = JSON.parse(saved)
         Object.assign(draft.value, parsed)
@@ -389,6 +409,12 @@ export function usePosterWorkspace() {
   }
 
   function setRecordId(id: number) {
+    const previousKey = STORAGE_KEY.value
+    if (!recordId.value && previousKey) {
+      try {
+        localStorage.removeItem(previousKey)
+      } catch { /* ignore */ }
+    }
     recordId.value = id
     persistDraft()
     syncUrl()
@@ -398,7 +424,8 @@ export function usePosterWorkspace() {
   function reset() {
     // 清理 localStorage
     try {
-      localStorage.removeItem(STORAGE_KEY.value)
+      const key = STORAGE_KEY.value
+      if (key) localStorage.removeItem(key)
     } catch { /* ignore */ }
 
     recordId.value = null