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

@@ -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() {