diff --git a/frontend/src/api/axios.ts b/frontend/src/api/axios.ts
index a3d95c25..f4e9bb5d 100644
--- a/frontend/src/api/axios.ts
+++ b/frontend/src/api/axios.ts
@@ -1,10 +1,13 @@
 import axios, { AxiosError, AxiosInstance, AxiosRequestConfig, AxiosResponse } from "axios";
 import { ElMessage } from "element-plus";
 import router from "../router";
-import { getToken, clearToken } from "../utils/auth";
+import { getToken } from "../utils/auth";
+import { useAuthStore } from "../store/auth";
 import type { ApiError } from "../types/api";
 import { useStudyStore } from "../store/study";
 
+let unauthorizedNotified = false;
+
 const instance: AxiosInstance = axios.create({
   baseURL: "/",
   timeout: 15000,
@@ -24,6 +27,19 @@ instance.interceptors.response.use(
   async (error: AxiosError<ApiError>) => {
     const status = error.response?.status;
     const data = error.response?.data;
+    // 401 统一处理：同步清理本地 token，并防止重复弹窗
+    const handleUnauthorized = () => {
+      const auth = useAuthStore();
+      auth.logout();
+      if (!unauthorizedNotified) {
+        unauthorizedNotified = true;
+        ElMessage.error(data?.message || "登录已过期，请重新登录");
+        setTimeout(() => {
+          unauthorizedNotified = false;
+        }, 1000);
+      }
+      router.push("/login");
+    };
     // 如果当前项目不存在或已失效，清理项目并跳到项目列表
     if (status === 404 && typeof data?.message === "string" && data.message.toLowerCase().includes("study")) {
       try {
@@ -35,9 +51,7 @@ instance.interceptors.response.use(
       router.push("/studies");
     }
     if (status === 401) {
-      clearToken();
-      ElMessage.error(data?.message || "登录已过期，请重新登录");
-      router.push("/login");
+      handleUnauthorized();
     } else if (data?.message) {
       ElMessage.error(data.message);
     } else {
diff --git a/frontend/src/router/index.ts b/frontend/src/router/index.ts
index 88c1d8e4..33838cdd 100644
--- a/frontend/src/router/index.ts
+++ b/frontend/src/router/index.ts
@@ -242,7 +242,8 @@ router.beforeEach(async (to, _from, next) => {
     try {
       await auth.fetchMe();
     } catch {
-      /* ignore */
+      // token 失效或用户不可用时立即登出，避免重复 401
+      auth.logout();
     }
   }
   if (!to.meta.public && !token) {
diff --git a/pg_data/base/1/pg_internal.init b/pg_data/base/1/pg_internal.init
new file mode 100644
index 00000000..2a1bfcbe
Binary files /dev/null and b/pg_data/base/1/pg_internal.init differ
diff --git a/pg_data/base/16384/2619 b/pg_data/base/16384/2619
index e98cd6db..7dce59c4 100644
Binary files a/pg_data/base/16384/2619 and b/pg_data/base/16384/2619 differ
diff --git a/pg_data/base/16384/pg_internal.init b/pg_data/base/16384/pg_internal.init
index a910745d..54aaaa7d 100644
Binary files a/pg_data/base/16384/pg_internal.init and b/pg_data/base/16384/pg_internal.init differ
diff --git a/pg_data/base/5/pg_internal.init b/pg_data/base/5/pg_internal.init
index 4bbb6d04..faaae29a 100644
Binary files a/pg_data/base/5/pg_internal.init and b/pg_data/base/5/pg_internal.init differ
diff --git a/pg_data/global/pg_control b/pg_data/global/pg_control
index 01f28223..f5130d35 100644
Binary files a/pg_data/global/pg_control and b/pg_data/global/pg_control differ
diff --git a/pg_data/global/pg_internal.init b/pg_data/global/pg_internal.init
index 1f1235d8..e0bda2e8 100644
Binary files a/pg_data/global/pg_internal.init and b/pg_data/global/pg_internal.init differ
diff --git a/pg_data/pg_stat/pgstat.stat b/pg_data/pg_stat/pgstat.stat
deleted file mode 100644
index 05bbb61e..00000000
Binary files a/pg_data/pg_stat/pgstat.stat and /dev/null differ
diff --git a/pg_data/pg_wal/000000010000000000000001 b/pg_data/pg_wal/000000010000000000000001
index 6463f07e..6dda9242 100644
Binary files a/pg_data/pg_wal/000000010000000000000001 and b/pg_data/pg_wal/000000010000000000000001 differ
diff --git a/pg_data/postmaster.pid b/pg_data/postmaster.pid
new file mode 100644
index 00000000..d555b0a6
--- /dev/null
+++ b/pg_data/postmaster.pid
@@ -0,0 +1,8 @@
+1
+/var/lib/postgresql/data
+1766032076
+5432
+/var/run/postgresql
+*
+    52727         0
+ready