test(audit): fix critical test suite deadlocks and write exhaustive architectural report

- Fix 'Triple Bingo' history synchronization explosion during streaming

- Implement stateless event buffering in ApiHookClient to prevent dropped events

- Ensure 'tool_execution' events emit consistently across all LLM providers

- Add hard timeouts to all background thread wait() conditions

- Add thorough teardown cleanup to conftest.py's reset_ai_client fixture

- Write highly detailed report_gemini.md exposing asyncio lifecycle flaws

tests/test_extended_sims.py

@@ -52,7 +52,6 @@ def test_tools_sim_live(live_gui: Any) -> None:
  sim.run() # Ensure history is updated via the async queue
  time.sleep(2)
  sim.teardown()
-
 @pytest.mark.integration
 def test_execution_sim_live(live_gui: Any) -> None:
  """Run the Execution & Modals simulation against a live GUI."""
@@ -60,7 +59,11 @@ def test_execution_sim_live(live_gui: Any) -> None:
  assert client.wait_for_server(timeout=10)
  sim = ExecutionSimulation(client)
  sim.setup("LiveExecutionSim")
+ # Enable manual approval to test modals
+ client.set_value('manual_approve', True)
  client.set_value('current_provider', 'gemini_cli')
  client.set_value('gcli_path', f'"{sys.executable}" "{os.path.abspath("tests/mock_gemini_cli.py")}"')
  sim.run()
+ time.sleep(2)
  sim.teardown()
+