feat: add drag and drop errors

src/utils/songStructure.js

@@ -284,8 +284,9 @@ export const normalizeStructureType = (value) => {
   return sanitized;
 };
 
-export const sanitizeStructureList = (structure = []) => {
+export const sanitizeStructureList = (structure = [], options = {}) => {
   if (!Array.isArray(structure)) return [];
+  const { autoInjectPreChorus = true } = options || {};
   const output = [];
   let shouldInjectInstrumentalPreChorus = false;
 
@@ -311,7 +312,7 @@ export const sanitizeStructureList = (structure = []) => {
       }
     }
 
-    if (type === "pre_refrain_instrumental") {
+    if (type === "pre_refrain_instrumental" && autoInjectPreChorus) {
       shouldInjectInstrumentalPreChorus = true;
       return;
     }
@@ -321,7 +322,7 @@ export const sanitizeStructureList = (structure = []) => {
 
   let result = output;
 
-  if (shouldInjectInstrumentalPreChorus) {
+  if (autoInjectPreChorus && shouldInjectInstrumentalPreChorus) {
     const expanded = [];
     let hasRefrain = false;