Automate Linux GUI applications through the AT-SPI accessibility tree using dogtail

Steps

1. Confirm the target application implements the ATK/AT-SPI accessibility bridge — AT-SPI2's `registryd` daemon only knows about apps that connect to the dedicated accessibility D-Bus and register themselves; non-bridged apps expose no tree to automate
2. Install dogtail, described by its own project as a Python GUI test/automation framework that "uses Accessibility (a11y) technologies to communicate with desktop applications"
3. Query the accessibility tree by application, then by node role/name, rather than by pixel coordinates, the same way any AT-SPI-based screen reader navigates the same UI
4. Drive found nodes' available actions (e.g. clicking) the way an assistive technology would trigger them, so the automation exercises the same accessible-actions path real AT users depend on
5. On modern dogtail (v1.0+), rely on the bundled `gnome-ponytail-daemon` helper for Wayland sessions — older dogtail's input injection assumed a direct X11/Xorg session running AT-SPI
6. Treat GTK/Qt/Electron-with-a11y-enabled apps as the realistic automation targets, since apps that never wire up ATK/AT-SPI are invisible to dogtail regardless of script correctness