update

backend/routes.py

@@ -217,7 +217,7 @@ async def run_repair_route(req: RepairRequest):
 
 
 @router.post("/blocks/research")
-async def add_blocks_research(topic: str, provider: str = "claude"):
+async def add_blocks_research(topic: str, provider: str = DEFAULT_PROVIDER):
     """Attach one more research agent — to the live flow, or attach-or-start."""
     if add_research_agent(topic):
         return {"ok": True, "attached": True}