Improve asset handling

CHDataManagement/Page Elements/ContentElements/AudioPlayer/AudioPlayerContent.swift

@@ -18,11 +18,11 @@ struct AudioPlayerScript: HtmlProducer {
     }
 
     func populate(_ result: inout String) {
-        result += "<script>\n"
+        result += "<script>window.onload = () => { "
         result += "Amplitude.init({ songs: "
         let songData = try! JSONEncoder().encode(items)
         result += String(data: songData, encoding: .utf8)!
-        result += "});"
+        result += "}); }; " // Close Amplitude.init and window.onload
         result += "function playEntry(index) { Amplitude.playSongAtIndex(index) };"
         result += animatePlaylist
         result += "</script>"