v0.24.0

What's New

• Rich messages: addRichMessage, highlightLink, renderMarkdown for markdown and HTML chat messages
• Fix reconfigure crash: Guard duplicate /variables route registration on http.ServeMux
• Reconfigure waiter notification: Stop() pushes server_reconfigured event via SafeExecuteInSession
• Event loop auto-reconnect: .ui/mcp event re-reads port on reconfigure instead of exiting
• UI highlight skill for drawing attention to UI elements
• Theme audit improvements for class annotation parsing
• ui-engine v0.18.0