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

src/Rules/AreaAlt.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace YakNet\AccessibilityConsole\Rules;
+
+use DOMElement;
+use YakNet\AccessibilityConsole\Core\Severity;
+use YakNet\AccessibilityConsole\Core\Violation;
+use YakNet\AccessibilityConsole\Core\WCAGStandard;
+
+class AreaAlt extends AbstractRule
+{
+    public function getId(): string { return 'WCAG_1_1_1_AreaAlt'; }
+    public function getDescription(): string { return 'Checks that <area> elements in image maps have non-empty alt attributes.'; }
+    public function getStandard(): WCAGStandard { return WCAGStandard::A; }
+    public function getSeverity(): Severity { return Severity::ERROR; }
+    public function getLevel(): int { return 2; }
+
+    public function check(DOMElement $element): ?Violation
+    {
+        if (strtolower($element->tagName) !== 'area') {
+            return null;
+        }
+        
+        $alt = $element->getAttribute('alt');
+        $ariaLabel = $element->getAttribute('aria-label');
+        
+        if (empty(trim($alt)) && empty(trim($ariaLabel))) {
+            return $this->createViolation(
+                $element,
+                '<area> öğesinde alt veya aria-label eksik.',
+                'Provide a non-empty alt or aria-label attribute for the <area> element.'
+            );
+        }
+        
+        return null;
+    }
+}