MRBS 1.12.2 等保2.0二级整改完整提交

包含：登录失败锁定、90天密码有效期、30分钟会话超时、
强制改密、登录审计日志、屏幕水印、企业背景图、
备案信息固定底部、favicon、JS空集合保护、
会话过期体验优化（403 JSON）、display_errors 关闭、
固定 key 根治 Integrity check failed 等全部改动

注意：config.inc.php/.htaccess/.user.ini 含敏感信息，
通过 .gitignore 排除，勿推送到公开仓库。

lib/GuzzleHttp/Exception/BadResponseException.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace GuzzleHttp\Exception;
+
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+
+/**
+ * Exception when an HTTP error occurs (4xx or 5xx error)
+ */
+class BadResponseException extends RequestException
+{
+    public function __construct(
+        string $message,
+        RequestInterface $request,
+        ResponseInterface $response,
+        ?\Throwable $previous = null,
+        array $handlerContext = []
+    ) {
+        parent::__construct($message, $request, $response, $previous, $handlerContext);
+    }
+
+    /**
+     * Current exception and the ones that extend it will always have a response.
+     */
+    public function hasResponse(): bool
+    {
+        return true;
+    }
+
+    /**
+     * This function narrows the return type from the parent class and does not allow it to be nullable.
+     */
+    public function getResponse(): ResponseInterface
+    {
+        /** @var ResponseInterface */
+        return parent::getResponse();
+    }
+}