add:新需求

src/views/education/notificationManageMent/stationLetter/index.vue

@@ -8,7 +8,7 @@
       <div>
         <el-button size="mini" type="primary" plain @click="haveRead"
           >标记为已读</el-button
-        ><el-button size="mini" type="primary" plain @click="notHaveRead"
+        ><el-button v-if="false" size="mini" type="primary" plain @click="notHaveRead"
           >标记为未读</el-button
         ><span style="font-size: 14px; margin-left: 10px">状态：</span
         ><el-select