优化webman-buildadmin框架

app/common/controller/Backend.php

@@ -80,6 +80,11 @@ class Backend extends Api
      */
     protected bool $dataLimitFieldAutoFill = true;
 
+    /**
+     * 添加时自动填充 admin_id（当模型有 admin_id 字段但无数据权限限制时使用）
+     */
+    protected bool $autoFillAdminId = false;
+
     /**
      * 查看请求返回的主表字段
      */
@@ -357,8 +362,10 @@ class Backend extends Api
         $order = $order ?: $this->defaultSortField;
 
         if ($order && is_string($order)) {
-            $order = explode(',', $order);
-            $order = [$order[0] => $order[1] ?? 'asc'];
+            $orderParts = explode(',', $order);
+            $orderField = trim($orderParts[0] ?? '');
+            $orderDir = trim($orderParts[1] ?? 'asc');
+            $order = $orderField !== '' ? [$orderField => $orderDir ?: 'asc'] : [];
         }
         if (!$this->orderGuarantee) {
             $this->orderGuarantee = [$pk => 'desc'];