[ai] Many (memory) improvements, cleanup script, still problems

web/script.js

@@ -245,7 +245,7 @@ function displayState(state) {
  var uidEl = document.getElementById("uid");
  if (uidEl) uidEl.innerHTML = 'Last NFC ID: ' + (state['uid'] || '');
 
- /* ==== Autofill convenience fields ==== */
+ /* Autofill convenience fields */
  var fm = document.getElementById('fileManager');
  if (state['filepath'] && fm && fm.style.display == 'none') {
    var moveFrom = document.getElementById('moveFrom');
@@ -301,7 +301,6 @@ function playNamedSong(song) {
  var xhr = new XMLHttpRequest();
  xhr.open("POST", "/playnamed");
  xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
- //application/x-www-form-urlencoded
  var body = song;
  xhr.send("title="+encodeURIComponent(body));
 }
@@ -327,8 +326,8 @@ function editMapping() {
 // Validate file before upload
 function validateFile(file) {
   var maxSize = 50 * 1024 * 1024; // 50MB limit
-  var allowedTypes = ['audio/mpeg', 'audio/wav', 'audio/flac', 'audio/mp4', 'audio/ogg'];
-  var allowedExtensions = ['.mp3', '.wav', '.flac', '.m4a', '.ogg'];
+  var allowedTypes = ['audio/mpeg', 'audio/wav'];
+  var allowedExtensions = ['.mp3'];
   
   if (file.size > maxSize) {
     return 'File too large. Maximum size is 50MB.';
@@ -338,7 +337,7 @@ function validateFile(file) {
   var hasValidExtension = allowedExtensions.some(ext => fileName.endsWith(ext));
   
   if (!hasValidExtension) {
-    return 'Invalid file type. Only audio files (.mp3, .wav, .flac, .m4a, .ogg) are allowed.';
+    return 'Invalid file type';
   }
   
   return null; // No error
@@ -443,7 +442,7 @@ function resetUploadForm() {
   document.getElementById('uploadFile').value = '';
 }
 
-/* ================= File Manager Functions ================= */
+/* File Manager Functions */
 
 function toggleFileManager() {
   var fm = document.getElementById('fileManager');