diff --git a/stores/authStore.ts b/stores/authStore.ts
index 9e5ca3d..056b599 100644
--- a/stores/authStore.ts
+++ b/stores/authStore.ts
@@ -33,12 +33,32 @@ export const useAuthStore = create<AuthState>()(
         user: state.user,
         isAuthenticated: state.isAuthenticated,
       }),
+      // 数据迁移函数：将旧格式的 userId 转换为新格式的 id
+      migrate: (persistedState: any, version: number) => {
+        console.log('[AuthStore] Migrating persisted state', { version, persistedState });
+
+        // 如果存在旧的 userId 字段，迁移到 id
+        if (persistedState?.user?.userId && !persistedState?.user?.id) {
+          console.log('[AuthStore] Migrating userId to id');
+          persistedState.user.id = persistedState.user.userId;
+          delete persistedState.user.userId;
+        }
+
+        return persistedState;
+      },
       onRehydrateStorage: () => (state) => {
         console.log('[AuthStore] Hydration started');
         if (state) {
+          // 额外的安全检查：确保 user 对象有 id 字段
+          if (state.user && (state.user as any).userId && !state.user.id) {
+            console.log('[AuthStore] Post-hydration migration: userId -> id');
+            state.user.id = (state.user as any).userId;
+            delete (state.user as any).userId;
+          }
+
           state.isHydrated = true;
           console.log('[AuthStore] Hydration completed', {
-            user: state.user?.id,
+            userId: state.user?.id,
             isAuthenticated: state.isAuthenticated
           });
         }