编辑用户时，不允许修改阶段

src/modules/admin-user/edit-user/index.vue

@@ -233,6 +233,7 @@ const items = computed<EpFormItem[]>(() => {
           prop: 'stage',
           slot: {
             placeholder: '选择阶段',
+            disabled: isEdit,
             options: [
               { label: 'SAMPLE_A', value: 'SAMPLE_A' },
               { label: 'SAMPLE_B', value: 'SAMPLE_B' },