fix: apply syntax highlighting to code blocks on page reload

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/uncloseai-embed-modal.js

@@ -1484,6 +1484,12 @@ You have complete knowledge of this page content and can reference any details,
 						const aiMsg = document.createElement("div");
 						aiMsg.className = "ai-message";
 						aiMsg.innerHTML = marked.parse(msg.content);
+						
+						// Add syntax highlighting to all code blocks
+						aiMsg.querySelectorAll("pre code").forEach((block) => {
+							hljs.highlightElement(block);
+						});
+						
 						addCodeBlockCopyButtons(aiMsg);
 
 						// Add TTS and delete buttons to historical AI messages