nixos/settings/ui.nix

# settings/ui.nix — shared UI metrics.
#
# Single source of truth for corner rounding. Both the quickshell shell
# (settings/quickshell.nix -> Theme.qml) and hyprland's window decoration
# (settings/hyprland.nix) read `radius` from here, and every other rounding
# value is derived from it, so this one number rescales the roundness of the
# whole desktop — panels, cards, pills, hover rows and window corners.
#
# Derived values live next to their consumers:
#   Theme.radiusCard  = radius - panelGap  (concentric nesting, see Theme.qml)
#   Theme.radiusSmall = radius * 0.75
#   Theme.radiusTiny  = radius * 0.5
#   hyprland decoration.rounding = radius
{
  radius = 20;
}