添加Web前端代码

version_check.php

@@ -0,0 +1,8 @@
+<?php
+// 版本标记文件 - 用于验证上传是否成功
+header('Content-Type: text/plain');
+echo "admin.php version: 2026-06-19-1527\n";
+echo "File size: " . filesize(__DIR__ . '/api/admin.php') . " bytes\n";
+echo "MD5: " . md5_file(__DIR__ . '/api/admin.php') . "\n";
+echo "Time: " . date('Y-m-d H:i:s') . "\n";
+?>