onw 1.4.8: review fixes across the window, tray, chat, API and engine; uninstall; pip after the restart; memory bar and NPU load; read-only weight mappings on Windows

onw 0.4: API-first server (/ info, /health, CORS, --api-key, /chat, /check), onw window (model download manager, server control, settings), setup finds / installs Python