增加扩展机制定位文件；将common模块实现扩展模式；发布新版本；

extend/base/common/event/AdminLoginSuccess/LogEventBase.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace base\common\event\AdminLoginSuccess;
+
+use app\admin\model\SystemAdmin;
+use think\facade\Log;
+
+class LogEventBase
+{
+    public function handle(SystemAdmin $system_admin)
+    {
+        // 事件监听处理
+        Log::report("admin login success,{$system_admin->username}");
+    }
+}

extend/base/common/event/AdminLoginType/DemoEventBase.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace base\common\event\AdminLoginType;
+
+use think\facade\Env;
+use think\facade\View;
+
+class DemoEventBase
+{
+    public function handle()
+    {
+        $content = '';
+
+        if (Env::get('adminsystem.is_demo', false)) {
+            $content = View::layout(false)->fetch('login/ext/demo');
+        }
+
+        // 事件监听处理
+        return [
+            'view_content' => $content,
+        ];
+    }
+}