Add new Glade UI definition file for the FWS recap (summary before installation) spoke. This defines the AnacondaStandaloneWindow layout with a scrollable text view to display installation summary information.
Implement a new Anaconda spoke that allows users to select their preferred desktop environment (CLI, GNOME, KDE Plasma, Hyprland, or XFCE) during installation.
The spoke:
- Displays radio buttons for five desktop choices with CLI as the default
- Persists the selection to /tmp/fws-desktop for the kickstart %post script
- Supports revisiting the spoke and resuming previous selections
- Includes a GTK UI definition file (glade) with translatable labels
- Integrates as a SoftwareCategory spoke in the Anaconda installer
The implementation leverages Anaconda's runtime spoke discovery mechanism via the airootfs overlay, avoiding the need to rebuild the anaconda package.
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