로그아웃 인증 정리

config/config.php

@@ -707,6 +707,22 @@ function control_admin_session_from_rhymix_or_custom(): bool
     return $checked;
 }
 
+function clear_common_admin_auth_cookie_if_available(): void
+{
+    $commonAuth = '/mnt/synology-web/custom/common/auth.php';
+    if (!is_file($commonAuth) || !is_readable($commonAuth)) {
+        return;
+    }
+
+    try {
+        require_once $commonAuth;
+        if (function_exists('custom_clear_auth_cookie')) {
+            custom_clear_auth_cookie();
+        }
+    } catch (Throwable) {
+    }
+}
+
 function require_login(): void
 {
     if (!signed_in()) {