Revert "Merge branch 'iteration-20240912' into test-online"

This reverts commit 26ab93ae14b5e7410f9c7ed6660631e6c7da76fe, reversing
changes made to 816aa8eeb490cb0c6778ed21d45181b94235fa68.

src/views/music-library/music-sheet/modal/music-operationV2.tsx

@@ -884,15 +884,15 @@ export default defineComponent({
     const initInstrumentAndSubjectByTrack = async (tracks: string[]) => {
       // 选择一个声轨，独奏
       // 选择了多个声轨，合奏，乐器和声部自动反显，不可修改
-      // if (!tracks || tracks.length <= 1) {
-      //   forms.musicSheetType = 'SINGLE'
-      //   state.subjectDisabled = false
-      //   state.instrumentDisabled = false
-      //   return
-      // }
-      forms.musicSheetType = !tracks || tracks.length <= 1 ? 'SINGLE' : 'CONCERT'
-      // state.subjectDisabled = true
-      // state.instrumentDisabled = true
+      if (!tracks || tracks.length <= 1) {
+        forms.musicSheetType = 'SINGLE'
+        state.subjectDisabled = false
+        state.instrumentDisabled = false
+        return
+      }
+      forms.musicSheetType = 'CONCERT'
+      state.subjectDisabled = true
+      state.instrumentDisabled = true
       await initInstrumentAndSubjectByCode(tracks)
     }