feat: 曲谱预览页，根据musicSheetType返回的值，判断是否显示切换声轨按钮

src/views/co-ai/index.tsx

@@ -314,18 +314,25 @@ export default defineComponent({
       }
     };
 
+    // 根据musicSheetType返回的值，判断是否显示切换声轨按钮
     const isEnsemble = computed(() => {
-      const musics = data.musics[data.musicIndex]?.musicalInstruments;
-      if (musics && musics.length) {
-        let list: any = [];
-        const arr = musics.forEach((item: any) => {
-          list.push({ name: item.name, code: item.code });
-        });
-      }
-      if (musics && musics.length > 1) {
-        return true;
-      } else {
+      // const musics = data.musics[data.musicIndex]?.musicalInstruments;
+      // if (musics && musics.length) {
+      //   let list: any = [];
+      //   const arr = musics.forEach((item: any) => {
+      //     list.push({ name: item.name, code: item.code });
+      //   });
+      // }
+      // if (musics && musics.length > 1) {
+      //   return true;
+      // } else {
+      //   return false;
+      // }
+      const musicSheetType = data.musics[data.musicIndex]?.musicSheetType;
+      if (musicSheetType === 'SINGLE') {
         return false;
+      }  else {
+        return true;
       }
     });