* add Waybar configs under `home-manager/hyprland/config/`
* extend Hyprland config with wallpaper, blur, animations, and new keybindings
* adjust common configs: Keychron (remove redundant xserver enable) and NVIDIA (add `videoDrivers = [ "nvidia" ]`)
* update `hosts/Nixstation` with GNOME desktop, GDM, Wacom config, and disable Hyprland
* add `home-manager/gnome/default.nix` with dconf, extensions, icons, and packages
* switch `home-manager/home.nix` from Hyprland to GNOME and update packages and Kitty config
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