refactor: 修改站点配置项输出接口

app/admin/controller/v1/SiteConfig.php

@@ -91,7 +91,7 @@ class SiteConfig
                 $extra = explode(PHP_EOL, $val['extra']);
                 $val['extra'] = [];
                 foreach ($extra as $v) {
-                    if (preg_match('/^([^:]+):(.*?)(?:\[(.*?)\])?$/i', $v, $match)) {
+                    if (preg_match('/^([^:]+):(.*?)(?:\[(.*?)\])?$/i', trim($v), $match)) {
                         $item = [
                             'name'          => $match[2],
                             'value'         => $match[1],