加上提示

src/components/classRoomHelper/component/searchArea.vue

@@ -413,6 +413,7 @@
             :disabled="loading || chatLoading"
             v-loading="loading || chatLoading"
             @keyup.enter.native="send()"
+						placeholder="输入'@'能进行对任务或学生分析'"
             class="s_b_i_left"
             v-model="text"
             ref="textRef"