Add WeCom markdown alerts and keep target exits while strategy is paused.

Notify open/close/start/pause/fault with SIM vs LIVE venue labels; configure webhook in Settings.

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

backend/app/api/settings.py

@@ -329,3 +329,54 @@ async def put_runtime_settings(
         pass
 
     return _runtime_payload()
+
+
+class NotifySettingsBody(BaseModel):
+    enabled: bool | None = None
+    webhook_url: str | None = None
+
+
+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(),
+    }
+
+
+@router.get("/notify")
+async def get_notify_settings(_user: Annotated[str, Depends(require_user)]) -> dict:
+    return _notify_payload()
+
+
+@router.put("/notify")
+async def put_notify_settings(
+    body: NotifySettingsBody,
+    _user: Annotated[str, Depends(require_user)],
+) -> dict:
+    updates: dict[str, str] = {}
+    if body.enabled is not None:
+        updates["WECOM_ENABLED"] = "1" if body.enabled else "0"
+        get_db().set_setting("wecom_enabled", "1" if body.enabled else "0")
+    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 updates:
+        upsert_env_keys(updates)
+    return _notify_payload()
+
+
+@router.post("/notify/test")
+async def test_notify(_user: Annotated[str, Depends(require_user)]) -> dict:
+    from ..notify import wecom
+
+    ok, msg = wecom.notify_test()
+    if not ok:
+        raise HTTPException(status_code=400, detail=f"推送失败: {msg}")
+    return {"ok": True, "detail": "测试消息已发送", **_notify_payload()}