添加浏览器ID，确保SSE可同时推送到不同的前端

Lawrence

2021-01-21 4b9549dfbf55d8af415efe609623e9d19dd6e6d4

 web_src/src/components/UiHeader.vue

@@ -34,7 +34,8 @@
        sseControl() {
            let that = this;
            if (this.alarmNotify) {
                this.sseSource = new EventSource('/api/emit'); 
                console.log("申请SSE推送API调用，浏览器ID: " + this.$browserId);
                this.sseSource = new EventSource('/api/emit?browserId=' + this.$browserId); 
               this.sseSource.addEventListener('message', function(evt) {
                    that.$notify({
                        title: '收到报警信息',