fix:token失效时接口返回401后强制跳转登录页，避免停留在空列表页

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

frontend/src/api/client.js

@@ -20,6 +20,9 @@ api.interceptors.response.use(
     if (error.response?.status === 401) {
       const { clearAuth } = useAuth()
       clearAuth()
+      if (window.location.pathname !== '/login') {
+        window.location.replace('/login')
+      }
     }
     return Promise.reject(error)
   }