feat(steps): hand pending root steps to a quickshell window

Notification balloons carried the GRUB and homepage root commands, but a
balloon cannot stay open while its commands are pasted into a root shell.
bin/udt-steps NAME writes a consumer's pending steps to
~/.cache/udt/steps/NAME and pokes quickshell's appearance shell, which shows
one tab per file on DP-3. Empty stdin clears the tab, so producers report
on every run and a consumer that caught up drops out by itself.

udt-grub and udt-homepage now route through it. install.sh's SDDM block
checks what is installed and reports only the steps still missing, rather
than printing the full install on every run. udt-homepage remembers the
last staged pair, since udt-accent now also runs on icon switches, which
change neither file and would re-raise the finish steps for nothing.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 29 insertions, 19 deletions

diff --git a/bin/udt-grub b/bin/udt-grub
index 20fd296..273389c 100755
--- a/bin/udt-grub
+++ b/bin/udt-grub
@@ -10,8 +10,8 @@
 # and a scheme switch leave the copy stale.
 #
 # udt-accent starts this detached on every run; install.sh runs it in the
-# foreground. A notification goes out only when an installed theme is stale:
-# a machine that never installed it has nothing to refresh.
+# foreground. The root steps go to the steps window through udt-steps, and
+# the tab clears itself once /boot matches the build.
 
 repo="$(dirname "$(readlink -f "$0")")/.."
 grub_repo="$(realpath -m "$repo/../grub-theme-udt")"
@@ -28,23 +28,33 @@ flock 9
 theme=/boot/grub/themes/udt
 copy="rm -rf $theme && cp -r \"$grub_repo/dist/udt\" /boot/grub/themes/"
 
-if diff -rq "$grub_repo/dist/udt" "$theme" >/dev/null 2>&1; then
-    echo "grub theme: up to date"
-elif [ -d "$theme" ]; then
-    echo "grub theme: refresh as root"
+steps() {
+    if diff -rq "$grub_repo/dist/udt" "$theme" >/dev/null 2>&1; then
+        return
+    elif [ -d "$theme" ]; then
+        echo "The GRUB theme was rebuilt. Refresh the copy in /boot as root:"
+    else
+        echo "The GRUB theme is built but not installed. As root:"
+    fi
     echo "  $copy"
-    command -v notify-send >/dev/null 2>&1 &&
-        notify-send -a udt "grub: theme rebuilt" "As root:
-$copy"
-else
-    echo "grub theme: run these as root to install it"
-    echo "  $copy"
-fi
-grep -q "^GRUB_THEME=\"$theme/theme.txt\"" /etc/default/grub 2>/dev/null || {
-    echo "  # once: GRUB_THEME=\"$theme/theme.txt\" in /etc/default/grub, then"
-    echo "  grub-mkconfig -o /boot/grub/grub.cfg"
+    grep -q "^GRUB_THEME=\"$theme/theme.txt\"" /etc/default/grub 2>/dev/null || {
+        echo
+        echo "Once, set GRUB_THEME=\"$theme/theme.txt\" in /etc/default/grub, then:"
+        echo "  grub-mkconfig -o /boot/grub/grub.cfg"
+    }
+    # The panel title falls back to the OS name until one is set.
+    [ -n "$("$repo/bin/udt-machine-name")" ] || {
+        echo
+        echo "Optional, the panel title:"
+        echo "  \"$repo/bin/udt-machine-name\" \"My Machine\""
+    }
 }
-# The panel title falls back to the OS name until one is set.
-[ -n "$("$repo/bin/udt-machine-name")" ] ||
-    echo "  # optional, the panel title: sudo \"$repo/bin/udt-machine-name\" \"My Machine\""
+
+out="$(steps)"
+echo "grub theme: ${out:-up to date}"
+# A theme that was never installed stays out of the steps window: a wallpaper
+# change would otherwise keep asking for an install nobody wanted.
+if [ -d "$theme" ] || [ -z "$out" ]; then
+    printf '%s' "$out" | "$repo/bin/udt-steps" grub
+fi
 exit 0