Add WeCom machine name for multi-node push labels.

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

backend/app/api/settings.py

@@ -558,19 +558,20 @@ async def put_runtime_settings(
 class NotifySettingsBody(BaseModel):
     enabled: bool | None = None
     webhook_url: str | None = None
+    machine_name: str | None = Field(default=None, max_length=64)
 
 
 def _notify_payload() -> dict:
     from ..notify import wecom
     from ..env_store import mask_secret
 
-    s = get_settings()
     url = wecom.wecom_webhook_url()
     return {
         "enabled": wecom.wecom_enabled(),
         "webhook_configured": bool(url),
         "webhook_url_masked": mask_secret(url) if url else None,
         "venue_label": wecom.venue_label(),
+        "machine_name": wecom.wecom_machine_name() or "",
     }
 
 
@@ -591,8 +592,13 @@ async def put_notify_settings(
     if body.webhook_url is not None and body.webhook_url.strip():
         updates["WECOM_WEBHOOK_URL"] = body.webhook_url.strip()
         get_db().set_setting("wecom_webhook_url", body.webhook_url.strip())
+    if body.machine_name is not None:
+        name = body.machine_name.strip()[:64]
+        updates["WECOM_MACHINE_NAME"] = name
+        get_db().set_setting("wecom_machine_name", name)
     if updates:
         upsert_env_keys(updates)
+        get_settings.cache_clear()
     return _notify_payload()