Add in-app + real-time notifications (SignalR/mock, Iran-friendly)

- AppNotification + OnlineService.onNotification (hub event + mock periodic) —
  no FCM/APNs (blocked in Iran); uses the existing realtime channel
- notification-store + pushNotification(); 🔔 bell with unread badge in TopBar,
  notifications screen, global toaster (plays notify sfx)
- Wired events: daily reward, post-match achievements, friend requests
- Closed-app push (Pushe/Najva/Chabok) noted as a later step (needs provider keys)

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

src/components/screens/GameScreen.tsx

@@ -7,6 +7,7 @@ import { useGameStore } from "@/lib/game-store";
 import { useSessionStore } from "@/lib/session-store";
 import { useUIStore } from "@/lib/ui-store";
 import { getService } from "@/lib/online/service";
+import { pushNotification } from "@/lib/notification-store";
 import { MatchSummary, RewardResult } from "@/lib/online/types";
 
 export function GameScreen() {
@@ -45,6 +46,15 @@ export function GameScreen() {
         .then((r) => {
           setReward(r);
           refreshProfile();
+          for (const a of r.newAchievements)
+            pushNotification({
+              kind: "achievement",
+              titleFa: "دستاورد جدید",
+              titleEn: "New achievement",
+              bodyFa: a.nameFa,
+              bodyEn: a.nameEn,
+              icon: a.icon,
+            });
         });
     }
   }, [mode, game.phase, game.matchWinner, game.matchScore, game.trump, meta, tally, refreshProfile]);