update

backend/routes.py

@@ -175,7 +175,7 @@ async def run_qa_route(req: QaRunRequest):
         report = await qa.qa_report(req.topic, llm=req.llm)
         if report is None:
             raise HTTPException(status_code=404, detail="keine fertigen Bausteine")
-        await asyncio.to_thread(qa._write_report, report)
+        await qa.write_report(report)
         note_guide = None
         try:  # fertiger Guide vorhanden → mitmessen (ein Klick, drei Noten); best-effort
             import guide_qa