fix: agent/run calls gateway.complete() not gateway.generate()

app_routes_extension.py

@@ -99,10 +99,9 @@ async def agent_run(body: AgentRunRequest) -> dict[str, Any]:
     try:
         from backend.llm.gateway import ModelGateway
         gateway = ModelGateway()
-        result = await gateway.generate(
+        result = await gateway.complete(
             prompt=body.message,
             intent="agent",
-            model_hint=body.model,
         )
         return {
             "response": result,