feat: redesign Telegram Mini App in keenetichome style

- Sectioned card layout: СЕРВЕРЫ, ДЕЙСТВИЯ, УВЕДОМЛЕНИЯ, СИСТЕМА
- Expandable server cards with metrics detail + reboot/delete
- Mute/unmute alerts (2h, 8h) with API support
- Green/red pulsing status dots, colored badges
- Toast notifications, loading spinner
- Overview API endpoint for Mini App data
- Mute integration with alerter system

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/services/alerter.py

@@ -13,6 +13,11 @@ previous_states: Dict[str, bool] = {}
 async def check_alerts():
     """Check metrics against thresholds and send alerts."""
     from server.services.telegram_bot import send_alert
+    from server.api.auth_routes import mute_until
+
+    # Check mute
+    if mute_until and datetime.now() < mute_until:
+        return
 
     settings = load_settings()
     servers = load_servers()