Fix niri live ISO audio and dark theme setup

iso/_inner-build-niri-live.sh

@@ -31,6 +31,28 @@ command -v xbps-install.static >/dev/null \
 
 mkdir -p "$(dirname "$OUT_ISO")"
 
+# Compile dconf system-db using Void's own dconf binary inside the target
+# rootfs. The Niri live builder writes /etc/dconf/db/local.d/01-dark-theme,
+# but the live system will not report the dark theme unless the GVDB is
+# compiled into /etc/dconf/db/local (and into skel for the live user).
+_DCONF_POSTSETUP="$(mktemp -p "$MKLIVE_DIR" postsetup-dconf.XXXXX.sh)"
+cat > "$_DCONF_POSTSETUP" <<'PSEOF'
+#!/bin/bash
+ROOTFS="$1"
+if [[ -x "$ROOTFS/usr/bin/dconf" ]] && [[ -d "$ROOTFS/etc/dconf/db/local.d" ]]; then
+    chroot "$ROOTFS" dconf compile /etc/dconf/db/local /etc/dconf/db/local.d \
+        && echo "postsetup: system-db compiled ($(chroot "$ROOTFS" dconf --version 2>/dev/null))" \
+        || echo "postsetup: system-db compile failed (non-fatal)"
+    mkdir -p "$ROOTFS/etc/skel/.config/dconf"
+    chroot "$ROOTFS" dconf compile /etc/skel/.config/dconf/user /etc/dconf/db/local.d \
+        && echo "postsetup: skel user dconf db compiled" \
+        || echo "postsetup: skel user dconf db compile failed (non-fatal)"
+else
+    echo "postsetup: dconf or keyfile dir not found in rootfs - skipping dconf compile"
+fi
+PSEOF
+chmod +x "$_DCONF_POSTSETUP"
+
 cd "$MKLIVE_DIR"
 
 # ── Pre-bake nix packages ────────────────────────────────────────────────
@@ -226,6 +248,7 @@ trap _cleanup_mklive_builds EXIT
     -v linux-mainline \
     -p "$ISO_PKGS" \
     -I "$INCLUDE_DIR" \
+    -x "$_DCONF_POSTSETUP" \
     -x "$PROJECT_DIR/iso/postsetup-nvidia.sh" \
     -C "${BOOT_CMDLINE:-}" \
     -o "$OUT_ISO"

iso/build-niri-live-iso.sh

@@ -859,7 +859,7 @@ ISO_PKGS=$(grep -vE '^\s*(#|$)' \
     | tr '\n' ' ')
 TS="$(date -u +%Y%m%d)"
 OUT_ISO="${OUTPUT_ISO:-$OUT_DIR/void-live-niri-${TS}.iso}"
-BOOT_CMDLINE="${BOOT_CMDLINE:-live.user=${LIVE_USER} console=tty0 console=ttyS0,115200 nvidia-drm.modeset=1 rd.driver.blacklist=nouveau modprobe.blacklist=nouveau btusb.enable_autosuspend=0 snd-intel-dspcfg.dsp_driver=1 snd_hda_intel.dmic_detect=0}"
+BOOT_CMDLINE="${BOOT_CMDLINE:-live.user=${LIVE_USER} console=tty0 console=ttyS0,115200 nvidia-drm.modeset=1 rd.driver.blacklist=nouveau modprobe.blacklist=nouveau btusb.enable_autosuspend=0}"
 
 echo ">>> running mklive.sh inside docker — output: $OUT_ISO"
 "$DOCKER" run --rm --privileged \