回滚bug修复

frontend/assets/js/common.js

@@ -51,6 +51,22 @@ async function apiRequest(url, options = {}) {
         
         if (response.status === 401) {
             clearAuth();
+            
+            // 防循环机制：检查是否已在登录页
+            if (window.location.pathname === '/index.php' || window.location.pathname === '/') {
+                console.warn('[Auth] 已在登录页收到401，停止重定向');
+                return null;
+            }
+            
+            // 防循环机制：5秒内重复401则停止重定向
+            const now = Date.now();
+            const lastRedirect = parseInt(sessionStorage.getItem('_last_401_redirect') || '0');
+            if (now - lastRedirect < 5000) {
+                console.warn('[Auth] 5秒内重复401，停止重定向。请检查Token是否有效。');
+                return null;
+            }
+            sessionStorage.setItem('_last_401_redirect', now.toString());
+            
             window.location.href = '/index.php';
             return null;
         }