create UserInterruptAgent with connection to UI

test/unit/agents/llm/test_llm_agent.py

@@ -197,6 +197,9 @@ async def test_query_llm_yields_final_tail_chunk(mock_settings):
     agent = LLMAgent("llm_agent")
     agent.send = AsyncMock()
 
+    agent.logger = MagicMock()
+    agent.logger.llm = MagicMock()
+
     # Patch _stream_query_llm to yield tokens that do NOT end with punctuation
     async def fake_stream(messages):
         yield "Hello"