feat: Seaca mobile API, enrollment, FCM push and admin UI (0.9.0)

Adds mobile device registration by admin codes, refresh tokens, push channel
in notification policy, and Settings section for managing Seaca clients.

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

backend/app/api/v1/settings.py

@@ -23,6 +23,11 @@ from app.services.notification_settings import (
     upsert_webhook_channel,
 )
 from app.services.telegram_notify import TelegramNotConfiguredError, TelegramSendError, send_telegram_test_message
+from app.services.webhook_notify import (
+    WebhookNotConfiguredError,
+    WebhookSendError,
+    send_webhook_test_message,
+)
 from app.services.event_severity_overrides import (
     SOURCE_DB,
     list_severity_override_items,
@@ -93,6 +98,7 @@ class NotificationPolicyResponse(BaseModel):
     use_telegram: bool
     use_webhook: bool
     use_email: bool
+    use_mobile: bool
     source: str = Field(description="env или db")
 
 
@@ -108,6 +114,7 @@ class NotificationPolicyUpdate(BaseModel):
     use_telegram: bool
     use_webhook: bool
     use_email: bool
+    use_mobile: bool = False
 
 
 class TelegramSettingsUpdate(BaseModel):
@@ -146,6 +153,7 @@ def _policy_to_response(cfg: NotificationPolicyConfig) -> NotificationPolicyResp
         use_telegram=cfg.use_telegram,
         use_webhook=cfg.use_webhook,
         use_email=cfg.use_email,
+        use_mobile=cfg.use_mobile,
         source=cfg.source,
     )
 
@@ -212,7 +220,7 @@ def update_notification_policy(
 ) -> NotificationPolicyResponse:
     if body.min_severity not in VALID_SEVERITIES:
         raise HTTPException(status_code=422, detail=f"min_severity must be one of: {sorted(VALID_SEVERITIES)}")
-    if not any((body.use_telegram, body.use_webhook, body.use_email)):
+    if not any((body.use_telegram, body.use_webhook, body.use_email, body.use_mobile)):
         raise HTTPException(status_code=422, detail="Выберите хотя бы один канал")
     try:
         policy = upsert_notification_policy(
@@ -221,6 +229,7 @@ def update_notification_policy(
             use_telegram=body.use_telegram,
             use_webhook=body.use_webhook,
             use_email=body.use_email,
+            use_mobile=body.use_mobile,
         )
     except ValueError as exc:
         raise HTTPException(status_code=422, detail=str(exc)) from exc