feat:修改存在的问题

src/utils/whiteboardSync.js

@@ -3,7 +3,7 @@ import { getWhiteboardShapes, getWhiteboardHistory } from "@/views/custom/api";
 import { useMeterStore } from '@/stores/modules/meter';
 import { encode, decode } from '@msgpack/msgpack'
 import { ElMessage } from 'element-plus';
-
+import { emitter } from "@/utils/bus.js";
 const meterStore = useMeterStore();
 meterStore.initUdid();
 
@@ -39,6 +39,8 @@ export const WhiteboardSync = {
             const res = await getWhiteboardHistory({ after_timestamp: 0 }, roomUid);
             if (res.meta.code === 200 && res.data.shapes.length > 0) {
                 canvasInstance.addShape(res.data.shapes);
+            }else if(res.meta.code === 401){
+                emitter.emit('whiteboardFailed',true);
             }
 
             // 订阅当前房间