Harden strategy SoT: fail-closed funds gate, shared open pipeline, LIVE switch guards.

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

backend/app/api/funds.py

@@ -230,6 +230,12 @@ async def funds_transfer(
         )
     finally:
         client.close()
+    try:
+        from ..strategy.open_capacity import invalidate_live_balance_cache
+
+        invalidate_live_balance_cache()
+    except Exception:
+        pass
     if not r.get("ok"):
         raise HTTPException(status_code=400, detail=r.get("detail") or "划转失败")
     return r