chore(tech-debt): Finalize gui_2.py cleanup and test suite discipline

tests/test_agent_tools_wiring.py

@@ -1,3 +1,4 @@
+import pytest
 import sys
 import os
 
@@ -9,6 +10,7 @@ from ai_client import set_agent_tools, _build_anthropic_tools
 def test_set_agent_tools() -> None:
  agent_tools = {"read_file": True, "list_directory": False}
  set_agent_tools(agent_tools)
+ pytest.fail("TODO: Implement assertions")
 
 def test_build_anthropic_tools_conversion() -> None:
  set_agent_tools({"read_file": True})