Refactor 4 with bugfixes

src/app/core/services/attachment.service.ts

@@ -5,6 +5,7 @@ import {
   signal,
   effect
 } from '@angular/core';
+import { take } from 'rxjs';
 import { v4 as uuidv4 } from 'uuid';
 import { WebRTCService } from './webrtc.service';
 import { Store } from '@ngrx/store';
@@ -983,12 +984,10 @@ export class AttachmentService {
   /** Resolve the display name of the current room via the NgRx store. */
   private resolveCurrentRoomName(): Promise<string> {
     return new Promise<string>((resolve) => {
-      const subscription = this.ngrxStore
+      this.ngrxStore
         .select(selectCurrentRoomName)
-        .subscribe((name) => {
-          resolve(name || '');
-          subscription.unsubscribe();
-        });
+        .pipe(take(1))
+        .subscribe((name) => resolve(name || ''));
     });
   }