fix(#24): address round-2 Copilot review (case-insensitive attribute lookup in html-interactive-content)

Author: johanrd

lib/utils/html-interactive-content.js

@@ -88,7 +88,16 @@ function isHtmlInteractiveContent(node, getTextAttrValue, options = {}) {
 }
 
 function hasAttribute(node, name) {
-  return Boolean(node.attributes && node.attributes.some((a) => a.name === name));
+  if (typeof name !== 'string') {
+    return false;
+  }
+  const normalizedName = name.toLowerCase();
+  return Boolean(
+    node.attributes &&
+      node.attributes.some(
+        (a) => typeof a.name === 'string' && a.name.toLowerCase() === normalizedName,
+      ),
+  );
 }
 
 module.exports = { isHtmlInteractiveContent };