chore(tests): Final stabilization of test suite and full isolation of live_gui artifacts

tests/test_api_events.py

@@ -36,6 +36,7 @@ def test_event_emission() -> None:
  callback.assert_called_once_with(payload={"data": 123})
 
 def test_send_emits_events_proper() -> None:
+ ai_client.reset_session()
  with patch("ai_client._ensure_gemini_client"), \
  patch("ai_client._gemini_client") as mock_client:
   mock_chat = MagicMock()
@@ -56,6 +57,7 @@ def test_send_emits_events_proper() -> None:
   assert kwargs['payload']['provider'] == 'gemini'
 
 def test_send_emits_tool_events() -> None:
+ ai_client.reset_session() # Clear caches and chats to avoid test pollution
  with patch("ai_client._ensure_gemini_client"), \
  patch("ai_client._gemini_client") as mock_client, \
  patch("mcp_client.dispatch") as mock_dispatch:
@@ -76,8 +78,12 @@ def test_send_emits_tool_events() -> None:
   mock_dispatch.return_value = "file content"
   ai_client.set_provider("gemini", "gemini-2.5-flash-lite")
   tool_callback = MagicMock()
-  ai_client.events.on("tool_execution", tool_callback)
-  ai_client.send("context", "message")
+  def debug_tool(*args, **kwargs):
+   print(f"DEBUG_TOOL_EVENT: {args} {kwargs}")
+   tool_callback(*args, **kwargs)
+  ai_client.events.on("tool_execution", debug_tool)
+  result = ai_client.send("context", "message")
+  print(f"DEBUG_RESULT: {result}")
   # Should be called twice: once for 'started', once for 'completed'
   assert tool_callback.call_count == 2
   # Check 'started' call