callouts: container directive support, mono tags

lib/callout-directive.js

@@ -3,8 +3,12 @@ import { visit } from 'unist-util-visit';
 export default function calloutDirective() {
   return (tree) => {
     visit(tree, (node) => {
-      // Handle textDirective (has content) and leafDirective (no content)
-      if (node.type === 'textDirective' || node.type === 'leafDirective') {
+      // Handle textDirective, leafDirective, and containerDirective callouts
+      if (
+        node.type === 'textDirective' ||
+        node.type === 'leafDirective' ||
+        node.type === 'containerDirective'
+      ) {
         const name = node.name;
 
         // Only handle known callout types
@@ -12,11 +16,10 @@ export default function calloutDirective() {
         if (!validTypes.includes(name)) return;
 
         // Extract attributes (e.g., title="...")
-        const attributes = node.attributes || [];
-        const attrs = attributes.map((attr) => ({
+        const attrs = Object.entries(node.attributes ?? {}).map(([name, value]) => ({
           type: 'mdxJsxAttribute',
-          name: attr.name,
-          value: attr.value,
+          name,
+          value,
         }));
 
         // Add type attribute