feat(keyboard): light the AK820 Pro in the wallpaper accentHEADmaster

udt-keyboard sets an Ajazz AK820 Pro to its "launch" effect in the
current accent through ak820-ctl, and does nothing without it.
udt-accent starts it detached on every run; --watch reapplies the
accent when the USB cable is plugged in, since the keyboard takes no
commands over its dongle or Bluetooth.

The firmware ignores a mode change unless the lights go off first and
settle, so it sends off, waits three seconds, then the mode. A lock
keeps a wallpaper change and a plug-in from interleaving the pairs.

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

1 files changed, 2 insertions, 1 deletions

diff --git a/bin/udt-accent b/bin/udt-accent
index 31798cc..b0b59b0 100755
--- a/bin/udt-accent
+++ b/bin/udt-accent
@@ -480,7 +480,8 @@ def main(image):
     # an unreachable host would hold the wallpaper change for the scp timeout.
     # GRUB's background is a wallpaper snapshot. Detached for the same reason;
     # it only rebuilds and notifies, since the copy into /boot needs root.
-    for helper in ("udt-homepage", "udt-grub"):
+    # The keyboard takes seconds per colour change, and is often not there.
+    for helper in ("udt-homepage", "udt-grub", "udt-keyboard"):
         subprocess.Popen([Path(__file__).resolve().parent / helper],
                          stdin=subprocess.DEVNULL, stdout=subprocess.DEVNULL,
                          stderr=subprocess.DEVNULL, start_new_session=True)