fix: prevent notification for own messages by deferring user assignment

The commit removes the `rooms` array and its initialization from the `App` constructor, and changes the `user` property assignment from an `await` call to a promise-based `.then()` callback. This ensures that `me.user` is set asynchronously after the constructor completes, preventing the notification system from triggering alerts for messages sent by the current user before their identity is fully loaded.

src/snek/static/app.js

@@ -298,7 +298,6 @@ class NotificationAudio {
 }
 
 class App extends EventHandler {
-    rooms = []
     rest = rest
     ws = null
     rpc = null
@@ -306,7 +305,6 @@ class App extends EventHandler {
     user = {}
     constructor() {
         super()
-        this.rooms.push(new Room("General"))
         this.ws = new Socket()
         this.rpc = this.ws.client
         const me = this
@@ -314,7 +312,10 @@ class App extends EventHandler {
         this.ws.addEventListener("channel-message", (data) => {
             me.emit(data.channel_uid, data)
         })
-        this.user = await this.rpc.getUser(null)
+
+        this.rpc.getUser(null).then(user=>{
+            me.user = user
+        })
     }
     playSound(index){
         this.audio.play(index)