melhorando a leitura de projetos no mmpCreator

assets/js/creations/audio/audio_ui.js

@@ -262,7 +262,7 @@ export function renderAudioEditor() {
   const newTrackContainer = existingTrackContainer.cloneNode(false);
   tracksParent.replaceChild(newTrackContainer, existingTrackContainer);
   // ✅ único scroller horizontal/vertical do editor
-  const scrollEl = existingTrackContainer; // #audio-track-container
+  const scrollEl = newTrackContainer; // #audio-track-container 
 
   // === RENDERIZAÇÃO DAS PISTAS (LANES) ===
   
@@ -528,13 +528,14 @@ export function renderAudioEditor() {
   }
 
   newTrackContainer.addEventListener("scroll", () => {
-    scrollEl.addEventListener("scroll", () => {
+    newTrackContainer.addEventListener("scroll", () => {
     const scrollPos = scrollEl.scrollLeft;
 
     const mainRuler = tracksParent.querySelector(".timeline-ruler");
     if (mainRuler && mainRuler.scrollLeft !== scrollPos) {
       mainRuler.scrollLeft = scrollPos; // funciona com overflow hidden (scroll programático)
     }
+    });
 
     // expansão "infinita"
     const threshold = 300;
@@ -829,16 +830,6 @@ export function renderAudioEditor() {
       }
     }
   });
-},
-
-function sendActionSafe(action) {
-    try {
-        sendAction(action);
-    } catch (err) {
-        console.warn("[SYNC] Falha ao emitir ação:", action.type, err);
-    }
-});
-}
 
 export function updateAudioEditorUI() {
   const playBtn = document.getElementById("audio-editor-play-btn");