Add music visualizer for music, radio, podcasts and audiobooks

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UaC9HmtHMdRP8dAbN4wAKj

public/index.html

@@ -79,6 +79,7 @@
 <script src="/save-to-files.js"></script>
 <script src="/vbv-view.js"></script>
 <script src="/lyrics-view.js"></script>
+<script src="/visualizer.js"></script>
 <script src="/settings.js"></script>
 <script src="/files.js"></script>
 <script src="/files-extra.js"></script>