fix: Seaca push uses same lifecycle text as Telegram (0.9.11)

Reuse telegram templates for FCM title/body so agent start/restart
reasons reach mobile without Seaca app changes.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/tests/test_mobile_notify.py

@@ -1,10 +1,33 @@
 """FCM push must not break event ingest."""
 
+from datetime import datetime, timezone
 from unittest.mock import MagicMock, patch
 
 import pytest
 
-from app.services.mobile_notify import MobileNotConfiguredError, _send_fcm_data
+from app.models import Event, Host
+from app.services.mobile_notify import MobileNotConfiguredError, _event_payload, _send_fcm_data
+
+
+def test_event_payload_lifecycle_uses_telegram_wording():
+    host = Host(hostname="WIN01", display_name="K6A-DC3", os_family="windows")
+    event = Event(
+        event_id="00000000-0000-4000-8000-000000000511",
+        host_id=1,
+        host=host,
+        occurred_at=datetime(2026, 5, 29, 9, 0, tzinfo=timezone.utc),
+        category="agent",
+        type="agent.lifecycle",
+        severity="info",
+        title="started",
+        summary="short",
+        details={"lifecycle": "started", "trigger": "settings_reload", "telegram_via": "sac"},
+        payload={"source": {"product": "ssh-monitor", "product_version": "1.4.0-SAC"}},
+    )
+    title, body, data = _event_payload(event)
+    assert title == "✅ Агент запущен"
+    assert "graceful restart" in body
+    assert data["type"] == "agent.lifecycle"
 
 
 def test_send_fcm_data_swallows_token_errors_by_default():