fix: extend visual summary timeout to 120 seconds

tests/unit/agents/test_flash_step_summarizer.py

@@ -51,6 +51,8 @@ def _user_role_prompt(messages):
 async def test_summarizer_dispatch_and_caching(mock_context):
     """Verify non-blocking dispatch and summary generation."""
     summarizer = VisualStepSummarizer(mock_context)
+    assert summarizer._timeout_seconds == 120.0
+    assert summarizer._flush_timeout_s > summarizer._timeout_seconds
 
     mock_llm_response = AIMessage(
         content="[Step 1 State: Tapped 'Login' button. Home view opened.]"