[fix]: artifact actionlist rendering in chat

app/components/chat/Markdown.tsx

@@ -68,7 +68,51 @@ export const Markdown = memo(({ children, html = false, limitedMarkdown = false
       remarkPlugins={remarkPlugins(limitedMarkdown)}
       rehypePlugins={rehypePlugins(html)}
     >
-      {children}
+      {stripCodeFenceFromArtifact(children)}
     </ReactMarkdown>
   );
 });
+
+/**
+ * Removes code fence markers (```) surrounding an artifact element while preserving the artifact content.
+ * This is necessary because artifacts should not be wrapped in code blocks when rendered for rendering action list.
+ *
+ * @param content - The markdown content to process
+ * @returns The processed content with code fence markers removed around artifacts
+ *
+ * @example
+ * // Removes code fences around artifact
+ * const input = "```xml\n<div class='__boltArtifact__'></div>\n```";
+ * stripCodeFenceFromArtifact(input);
+ * // Returns: "\n<div class='__boltArtifact__'></div>\n"
+ *
+ * @remarks
+ * - Only removes code fences that directly wrap an artifact (marked with __boltArtifact__ class)
+ * - Handles code fences with optional language specifications (e.g. ```xml, ```typescript)
+ * - Preserves original content if no artifact is found
+ * - Safely handles edge cases like empty input or artifacts at start/end of content
+ */
+export const stripCodeFenceFromArtifact = (content: string) => {
+  if (!content || !content.includes('__boltArtifact__')) {
+    return content;
+  }
+
+  const lines = content.split('\n');
+  const artifactLineIndex = lines.findIndex((line) => line.includes('__boltArtifact__'));
+
+  // Return original content if artifact line not found
+  if (artifactLineIndex === -1) {
+    return content;
+  }
+
+  // Check previous line for code fence
+  if (artifactLineIndex > 0 && lines[artifactLineIndex - 1]?.trim().match(/^```\w*$/)) {
+    lines[artifactLineIndex - 1] = '';
+  }
+
+  if (artifactLineIndex < lines.length - 1 && lines[artifactLineIndex + 1]?.trim().match(/^```$/)) {
+    lines[artifactLineIndex + 1] = '';
+  }
+
+  return lines.join('\n');
+};