feat(palette): add a translucent scrim role for fullscreen overlays

The power menu's ground was a hardcoded rgba(36, 39, 58, 0.88),
Macchiato's base, so every other scheme drew its overlay with a
Macchiato tint. Each roles file now defines scrim as its own
background at 88% alpha, udt-palette emits it into palette.rasi, and
powermenu.rasi uses @scrim.

scrim is the first translucent palette entry, so udt-accent's QML
palette no longer drops the alpha pair: an opaque colour still goes
out as #rrggbb, a translucent one as QML's #aarrggbb.

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

1 files changed, 3 insertions, 3 deletions

diff --git a/rofi/udt/powermenu.rasi b/rofi/udt/powermenu.rasi
index d2c885a..92c5b07 100644
--- a/rofi/udt/powermenu.rasi
+++ b/rofi/udt/powermenu.rasi
@@ -12,11 +12,11 @@
 
 /* The fullscreen ground is translucent so the desktop stays faintly visible
  * behind it, which keeps the overlay reading as a layer over the session
- * rather than a screen the session was replaced by. Written as an explicit
- * rgba rather than @base, since the palette entries are fully opaque. */
+ * rather than a screen the session was replaced by. @scrim is the scheme's
+ * background at 88% alpha, the one translucent palette entry. */
 window {
     fullscreen:       true;
-    background-color: rgba(36, 39, 58, 0.88);
+    background-color: @scrim;
     border:           0;
     border-radius:    0;
     padding:          0;