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。

style.inc

@@ -0,0 +1,65 @@
+<?php
+declare(strict_types=1);
+namespace MRBS;
+
+
+// Generates the HTML for a <link> element
+
+// We use \MRBS\Intl\Locale rather than \Locale because (a) we use isRightToLeft() method
+// which is only available from PHP 8.5, and (b) because we can't guarantee that the intl
+// extension is installed.
+use MRBS\Intl\Locale;
+
+function link_html(string $href, bool $add_version=false, ?string $media=null) : string
+{
+  $html = '<link rel="stylesheet" type="text/css" href="';
+  $value = ($add_version) ? add_version($href) : $href;
+  $html .= escape_html($value) . '"';
+  if (isset($media))
+  {
+    $html .= " media=\"$media\"";
+  }
+  $html .= ">\n";
+
+  return $html;
+}
+
+
+global $custom_css_url, $theme;
+global $debug;
+
+echo link_html(($debug) ? 'jquery/ui/css/jquery-ui.structure.css' : 'jquery/ui/css/jquery-ui.structure.min.css', true);
+echo link_html(($debug) ? 'jquery/ui/css/cupertino/jquery-ui.theme.css' : 'jquery/ui/css/cupertino/jquery-ui.theme.min.css', true);
+echo link_html(($debug) ? 'jquery/datatables/datatables.css' : 'jquery/datatables/datatables.min.css', true);
+echo link_html('js/flatpickr/css/flatpickr.min.css', true);
+echo link_html('jquery/select2/dist/css/select2.min.css', true);
+echo link_html(multisite('css/mrbs.css.php'), true);
+
+$using_rtl_lang = Locale::isRightToLeft(Language::getInstance()->getWebLang());
+if ($using_rtl_lang)
+{
+  echo link_html(multisite('css/mrbs-rtl.css.php'), true);
+}
+
+echo link_html(multisite('css/mrbs-print.css.php'), true, 'print');
+
+echo "<!--[if IE]>\n";
+echo link_html('css/mrbs-ie.css', true);
+if ($using_rtl_lang)
+{
+  echo link_html('css/mrbs-ie-rtl.css', true);
+}
+echo "<![endif]-->\n";
+
+// Load the theme CSS, if any
+$theme_css = "Themes/$theme/theme.css";
+if (is_readable($theme_css))
+{
+  echo link_html($theme_css, true);
+}
+
+// Load the custom CSS, if any
+if (isset($custom_css_url))
+{
+  echo link_html($custom_css_url, true);
+}