feat(accent): play the border gradient on a Tuya LED strip

udt-ledstrip sends the window border's three hues to every Tuya
addressable strip in the tinytuya device list as a flow scene (DP 51,
dreamlight_scene_mode), so the strip moves with the wallpaper accent.

Fully local: it speaks protocol 3.5 itself with cryptography, finds the
strip by its UDP discovery broadcast, and reads the local key from
~/.config/udt/tuya/devices.json, written once by tinytuya's wizard.
DP 51's layout is undocumented and missing from the cloud spec; it was
read off the strip's status pushes while the app set scenes. Saturation
is floored at full because LEDs render pastel accents as white.

udt-accent starts it detached next to udt-keyboard; install.sh links it.

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

1 files changed, 3 insertions, 1 deletions

diff --git a/bin/udt-accent b/bin/udt-accent
index 5bb324b..2f9440d 100755
--- a/bin/udt-accent
+++ b/bin/udt-accent
@@ -625,7 +625,9 @@ def main(image):
     # GRUB's background is a wallpaper snapshot. Detached for the same reason;
     # it only rebuilds and notifies, since the copy into /boot needs root.
     # The keyboard takes seconds per colour change, and is often not there.
-    for helper in ("udt-homepage", "udt-grub", "udt-keyboard"):
+    # The LED strip waits up to 20 s for its address broadcast. Both read
+    # files written above.
+    for helper in ("udt-homepage", "udt-grub", "udt-keyboard", "udt-ledstrip"):
         subprocess.Popen([Path(__file__).resolve().parent / helper],
                          stdin=subprocess.DEVNULL, stdout=subprocess.DEVNULL,
                          stderr=subprocess.DEVNULL, start_new_session=True)