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/mock-service.ts

@@ -475,34 +475,12 @@ export class MockOnlineService implements OnlineService {
   /* --------------------------- notifications ------------------------- */
 
   private notifCbs = new Set<(n: AppNotification) => void>();
-  private notifTimer: ReturnType<typeof setInterval> | null = null;
 
+  // Real notifications only — no periodic fake/"liveliness" spam.
   onNotification(cb: (n: AppNotification) => void): Unsubscribe {
     this.notifCbs.add(cb);
-    if (this.notifTimer == null) {
-      const samples: Array<Pick<AppNotification, "kind" | "titleFa" | "titleEn" | "icon">> = [
-        { kind: "system", titleFa: "یک دوست آنلاین شد", titleEn: "A friend is online", icon: "👋" },
-        { kind: "system", titleFa: "مسابقه‌ی امروز شروع شد", titleEn: "Today's event is live", icon: "🏆" },
-        { kind: "invite", titleFa: "یک نفر دنبال هم‌بازیه", titleEn: "Someone is looking for a partner", icon: "🎴" },
-      ];
-      this.notifTimer = setInterval(() => {
-        if (this.notifCbs.size === 0) return;
-        const s = pick(samples);
-        const n: AppNotification = {
-          id: rid("ntf"),
-          ts: Date.now(),
-          read: false,
-          ...s,
-        };
-        for (const c of this.notifCbs) c(n);
-      }, 35000);
-    }
     return () => {
       this.notifCbs.delete(cb);
-      if (this.notifCbs.size === 0 && this.notifTimer) {
-        clearInterval(this.notifTimer);
-        this.notifTimer = null;
-      }
     };
   }