fix:消息通知新增改为可选类型

src/views/system/message/index.vue

@@ -70,7 +70,6 @@
           <el-col :span="11">
             <el-form-item label="类型" prop="type">
               <el-select
-                disabled
                 v-model="message.type"
                 placeholder="类型"
                 clearable