优化删除按钮显示逻辑

src/components/education/template/templateMessage.vue

@@ -38,7 +38,7 @@
           ></el-input>
           <span class="word-num">{{(formData.organizationNameList[index]).replace(/\s+/g,"").length}}/16</span>
           <img @click="plusOrg(index)" class="edit-img" src="../../../assets/image/plus.png" v-if="isPreview!=1"/>
-          <img @click="deleteOrg(index)" v-if="index >= 1" class="edit-img" src="../../../assets/image/trash.png" />
+          <img @click="deleteOrg(index)" v-if="index >= 1 && isPreview!=1" class="edit-img" src="../../../assets/image/trash.png" />
         </el-col>
         <el-popover
           class="popover-content" :style="{'top': orgListIndex * 41 + 'px'}"