fix: should now sync with other devices

toju-app/src/app/domains/direct-message/application/services/friend.service.ts

@@ -7,6 +7,7 @@ import {
   signal
 } from '@angular/core';
 import { Store } from '@ngrx/store';
+import { RealtimeSessionFacade } from '../../../../core/realtime';
 import { FriendRepository } from '../../infrastructure/friend.repository';
 import type { Friend } from '../../domain/models/direct-message.model';
 import { selectCurrentUser } from '../../../../store/users/users.selectors';
@@ -15,6 +16,7 @@ import { selectCurrentUser } from '../../../../store/users/users.selectors';
 export class FriendService {
   private readonly repository = inject(FriendRepository);
   private readonly store = inject(Store);
+  private readonly webrtc = inject(RealtimeSessionFacade);
   private readonly currentUser = this.store.selectSignal(selectCurrentUser);
   private readonly friendsSignal = signal<Friend[]>([]);
   private loadedOwnerId: string | null = null;
@@ -36,11 +38,42 @@ export class FriendService {
 
     await this.repository.addFriend(ownerId, friend);
     await this.loadForOwner(ownerId, true);
+    this.webrtc.relayAccountSync({
+      type: 'friend-added',
+      userId,
+      addedAt: friend.addedAt
+    });
   }
 
   async removeFriend(userId: string): Promise<void> {
     const ownerId = await this.requireOwnerId();
 
+    await this.repository.removeFriend(ownerId, userId);
+    await this.loadForOwner(ownerId, true);
+    this.webrtc.relayAccountSync({
+      type: 'friend-removed',
+      userId
+    });
+  }
+
+  async applyRemoteFriendAdded(userId: string, addedAt: number): Promise<void> {
+    const ownerId = await this.requireOwnerId();
+
+    if (this.isFriend(userId)) {
+      return;
+    }
+
+    await this.repository.addFriend(ownerId, { userId, addedAt });
+    await this.loadForOwner(ownerId, true);
+  }
+
+  async applyRemoteFriendRemoved(userId: string): Promise<void> {
+    const ownerId = await this.requireOwnerId();
+
+    if (!this.isFriend(userId)) {
+      return;
+    }
+
     await this.repository.removeFriend(ownerId, userId);
     await this.loadForOwner(ownerId, true);
   }