fix: 添加录音时间至少5秒的校验

防止用户录音时间过短，当录音时间少于5秒时显示警告信息并终止操作

src/components/pptEasyClass/index.vue

@@ -173,6 +173,12 @@ export default {
         }
         this.onFinishRecordWithMicrosoft();
       } else {
+        const now = new Date();
+        const duration = (now - new Date(this.recordingEndTime)) / 1000;
+        if (duration < 5) {
+          this.$message.warning('录音时间至少间距5秒');
+          return;
+        }
         this.onStartRecordWithMicrosoft();
       }
     },