增加后台基础功能，调整前端菜单返回

app/admin/service/CountryService.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace app\admin\service;
+
+use app\common\validate\CountryValidate;
+use app\common\traits\crud\CrudServiceTrait;
+use app\common\model\CorpFeishuApp;
+
+class CountryService
+{
+
+    use CrudServiceTrait;
+
+    /**
+     * 指定当前要操作的模型
+     */
+    protected string $modelClass = CorpFeishuApp::class;
+
+    /**
+     * 验证器
+     */
+    protected $validator = CountryValidate::class;
+
+    /**
+     * 获取验证器
+     */
+    public function getValidator()
+    {
+        return  new $this->validator;
+    }
+}