adicionando instrumentos no editor de patterns

assets/js/creations/main.js

@@ -698,7 +698,11 @@ document.addEventListener("DOMContentLoaded", () => {
       (appState.audio.audioEditorSeekTime ?? 0) ||
       0;
 
-    const patternIndex = appState.pattern.activePatternIndex || 0;
+    const patternIndex = appState.pattern.activePatternIndex;
+    if (!Number.isInteger(patternIndex)) {
+      showToast("Selecione uma pattern antes de enviar.", "error");
+      return;
+    }
 
     let posTicks = secondsToSongTicks(sec, bpm);
     posTicks = snapSongTicks(posTicks, LMMS_TICKS_PER_BAR); // snap por compasso (fica LMMS-like)
@@ -714,10 +718,14 @@ document.addEventListener("DOMContentLoaded", () => {
 
 
   window.exitPatternFocus = function() {
-      console.log("Saindo do foco da Bassline");
-      appState.pattern.focusedBasslineId = null;
-      renderAll();
-  }
+    console.log("Saindo do foco da Bassline");
+    appState.pattern.focusedBasslineId = null;
+
+    // ✅ sem pattern selecionada no Song Editor
+    appState.pattern.activePatternIndex = null;
+
+    renderAll();
+  } 
 
   loadAndRenderSampleBrowser();