修复

frontend/app/web-gold/src/views/material/Mix.vue

@@ -323,7 +323,7 @@ const formData = ref({
   produceCount: Number(localStorage.getItem('mix-produce-count')) || 3,
   totalDuration: 15,
   clipDuration: 5,
-  cropMode: 'center'
+  cropMode: localStorage.getItem('mix-crop-mode') || 'center'
 })
 
 const uiState = ref({
@@ -377,6 +377,11 @@ const saveProduceCount = () => {
   localStorage.setItem('mix-produce-count', formData.value.produceCount.toString())
 }
 
+// 监听裁剪模式变化，保存到 localStorage
+watch(() => formData.value.cropMode, (newVal) => {
+  localStorage.setItem('mix-crop-mode', newVal)
+})
+
 const getFileById = (fileId) => {
   let file = dataState.value.groupFiles.find(f => f.id === fileId)
   if (file) return file