move clientId init to index.html, make zoom events only exist when they actually do something

public/index.html

@@ -18,6 +18,15 @@
     const res = await fetch(`/api/conf`)
     const conf = await res.json()
 
+    function initme() {
+      let ID = localStorage.getItem('ID')
+      if (!ID) {
+        ID = Util.uniqId()
+        localStorage.setItem('ID', ID)
+      }
+      return ID
+    }
+
     const router = VueRouter.createRouter({
       history: VueRouter.createWebHashHistory(),
       routes: [
@@ -37,6 +46,7 @@
 
     const app = Vue.createApp(App)
     app.config.globalProperties.$config = conf
+    app.config.globalProperties.$clientId = initme()
     app.use(router)
     app.mount('#app')
   })()