Set dark mode

03-user/40-defaults.sh

@@ -14,12 +14,17 @@ xdg-mime default org.gnome.Nautilus.desktop inode/directory
 # session nothing sets these, so libadwaita/GNOME apps (Nautilus, …) would fall
 # back to generic Sans. gtk-*/settings.ini covers the GTK toolkit font;
 # gsettings covers the document/monospace fonts read via dconf/the portal.
+# color-scheme=prefer-dark is the authoritative dark-mode signal: GTK4/libadwaita
+# apps read it directly, and xdg-desktop-portal reports it via the appearance API
+# (so GTK3 and Qt apps that ask the portal go dark too). See gtk-*/settings.ini
+# for the GTK toolkit dark toggle and ~/.config/kdeglobals for KDE apps.
 if command -v gsettings >/dev/null 2>&1; then
   gsettings set org.gnome.desktop.interface font-name 'Adwaita Sans 11' \
     && gsettings set org.gnome.desktop.interface document-font-name 'Adwaita Sans 11' \
     && gsettings set org.gnome.desktop.interface monospace-font-name 'SF Mono 11' \
-    && info "interface fonts → Adwaita Sans / SF Mono" \
-    || echo "   skip: could not set gsettings interface fonts"
+    && gsettings set org.gnome.desktop.interface color-scheme 'prefer-dark' \
+    && info "interface fonts → Adwaita Sans / SF Mono, color-scheme → prefer-dark" \
+    || echo "   skip: could not set gsettings interface prefs"
 fi
 
 # User services that ship as ~/.config/systemd/user units (from dotfiles).