feat(router): prevent redirection from public landing pages on session expiration

frontend/src/utils/axios.js

@@ -32,7 +32,9 @@ apiClient.interceptors.response.use(response => {
     return response;
 }, error => {
     if (error.response && error.response.status === 401) {
-        store.dispatch('logout');
+        // A failed background request may clear a stale browser session, but
+        // it must not replace the visitor's current public landing URL.
+        store.dispatch('logout', { redirectToHome: false });
     }
     return Promise.reject(error);
 });