Remove fake/periodic notifications (spam)

The mock emitted random "a friend is online / event is live" notifications on a
35s timer and the live service forwarded them. Dropped both — only real
notifications now fire (friend requests, achievements, daily reward, payment,
match-ended, and server hub events).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/lib/online/signalr-service.ts

@@ -58,7 +58,6 @@ export class SignalrService implements OnlineService {
   private chatCbs = new Set<(id: string, m: ChatMessage[]) => void>();
   private forfeitCbs = new Set<(r: ForfeitRequest | null) => void>();
   private cachedProfile: UserProfile | null = null;
-  private mockNotifUnsub?: () => void;
 
   constructor() {
     if (typeof window !== "undefined") {
@@ -385,10 +384,9 @@ export class SignalrService implements OnlineService {
   onChat(cb: (id: string, m: ChatMessage[]) => void) { this.chatCbs.add(cb); return () => this.chatCbs.delete(cb); }
 
   onNotification(cb: (n: AppNotification) => void): Unsubscribe {
+    // Real notifications only — server hub "notification" events + app-generated
+    // ones (friend requests, achievements, daily, payment). No fake spam.
     this.notifCbs.add(cb);
-    // also forward the mock's periodic notifications for liveliness
-    if (!this.mockNotifUnsub)
-      this.mockNotifUnsub = this.mock.onNotification((n) => this.notifCbs.forEach((c) => c(n)));
     return () => this.notifCbs.delete(cb);
   }