feat(niri): niri live config

iso/build-live-iso.sh

@@ -66,6 +66,8 @@ fi
 
 # 3) build includes overlay
 echo ">>> staging live includes overlay at $INCLUDE_DIR"
+# The nix store (staged by Docker/root) uses 444/555 permissions — chmod first.
+chmod -R u+rwX "$INCLUDE_DIR" 2>/dev/null || true
 rm -rf "$INCLUDE_DIR"
 mkdir -p "$INCLUDE_DIR"
 
@@ -408,7 +410,10 @@ picture-uri='file:///usr/share/backgrounds/void-installer/${WALLPAPER_FILE}'
 picture-options='zoom'
 
 [org/gnome/desktop/input-sources]
-sources=[('xkb', 'ch+fr')]
+sources=[('xkb', '${KEYMAP//-/+}')]
+
+[org/gnome/desktop/interface]
+color-scheme='prefer-dark'
 
 [org/cinnamon/desktop/default-applications/terminal]
 exec='alacritty'
@@ -530,8 +535,9 @@ gsettings set org.cinnamon.desktop.default-applications.terminal exec-arg '-e'
 gsettings set org.gnome.desktop.default-applications.terminal    exec     '${DEFAULT_TERMINAL:-alacritty}'
 gsettings set org.gnome.desktop.default-applications.terminal    exec-arg '-e'
 
-# Keyboard layout (Swiss French)
-gsettings set org.gnome.desktop.input-sources sources "[('xkb', '${KEYMAP:-ch+fr_nodeadkeys}')]"
+# Keyboard layout — set explicitly via gsettings (belt-and-suspenders alongside
+# the user dconf db pre-baked in /etc/skel at build time).
+gsettings set org.gnome.desktop.input-sources sources "[('xkb', '${KEYMAP//-/+}')]"
 
 touch "\$DONE"
 EOF