fix: 修复消息时间格式缩进并启用QNRTC日志级别设置

调整消息时间显示的缩进格式，保持代码风格一致
同时取消QNRTC日志级别设置的注释，避免产生不必要的日志输出

src/components/study/liveView.vue

@@ -186,7 +186,7 @@
                       v-if="message.sender.slice(0, 7) === 'teacher'">講師</span>{{ message.sender }}</span>
                   <span class="message-time">{{
                     "\u00A0\u00A0\u00A0" + formatTimestamp(message.time)
-                  }}</span>
+                    }}</span>
                 </div>
                 <div class="message-text">{{ message.text }}</div>
               </div>
@@ -251,7 +251,7 @@ import { getStore } from "@/utils/storage";
 import { mapState } from "vuex";
 import { MessageBox } from "mint-ui";
 import { v4 as uuidv4 } from "uuid";
-// QNRTC.setLogLevel(QNLogLevel.NONE);
+QNRTC.setLogLevel(QNLogLevel.NONE);
 export default {
   components: { Back },
   data() {