fix: resolve PHPStan level 9 errors and bump version to v3.1.3

src/Rules/LandmarkContentInfo.php

@@ -0,0 +1,61 @@
+<?php
+
+namespace YakNet\AccessibilityConsole\Rules;
+
+use DOMElement;
+use DOMXPath;
+use YakNet\AccessibilityConsole\Core\Severity;
+use YakNet\AccessibilityConsole\Core\Violation;
+use YakNet\AccessibilityConsole\Core\WCAGStandard;
+
+class LandmarkContentInfo extends AbstractRule
+{
+    public function getId(): string { return 'WCAG_1_3_1_LandmarkContentInfo'; }
+    public function getDescription(): string { return 'Checks that there is at most one page-level <footer> element.'; }
+    public function getStandard(): WCAGStandard { return WCAGStandard::A; }
+    public function getSeverity(): Severity { return Severity::WARNING; }
+    public function getLevel(): int { return 4; }
+
+    public function check(DOMElement $element): ?Violation
+    {
+        if (strtolower($element->tagName) !== 'footer') {
+            return null;
+        }
+        
+        $doc = $element->ownerDocument;
+        if ($doc === null) {
+            return null;
+        }
+        $xpath = new DOMXPath($doc);
+        $ancestors = $xpath->query('ancestor::article | ancestor::section | ancestor::aside | ancestor::nav | ancestor::main', $element);
+        
+        if ($ancestors !== false && $ancestors->length > 0) {
+            return null; // It's not a page-level footer
+        }
+        
+        $footers = $xpath->query('//footer');
+        if ($footers === false) {
+            return null;
+        }
+
+        $index = 0;
+        foreach ($footers as $footer) {
+            if (!$footer instanceof \DOMNode) {
+                continue;
+            }
+            $anc = $xpath->query('ancestor::article | ancestor::section | ancestor::aside | ancestor::nav | ancestor::main', $footer);
+            if ($anc !== false && $anc->length === 0) {
+                $index++;
+                if ($footer->isSameNode($element) && $index > 1) {
+                    return $this->createViolation(
+                        $element,
+                        'Sayfada birden fazla ana (top-level) <footer> bulundu.',
+                        'Ensure there is at most one top-level <footer> element (contentinfo landmark) on the page.'
+                    );
+                }
+            }
+        }
+        
+        return null;
+    }
+}