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>

10 files changed, 40 insertions, 0 deletions

diff --git a/palette/roles-candy-night.conf b/palette/roles-candy-night.conf
index c3fc514..58bb7a6 100644
--- a/palette/roles-candy-night.conf
+++ b/palette/roles-candy-night.conf
@@ -16,6 +16,10 @@ surface     = surface
 surface_alt = selection
 border      = gutter
 
+# The translucent ground behind a fullscreen overlay (power menu, screenshot
+# menu): the background, faded so the session shows through.
+scrim       = background/88
+
 fg          = foreground
 fg_dim      = light
 fg_faint    = comment
diff --git a/palette/roles-dracula.conf b/palette/roles-dracula.conf
index 4ff2485..26ca7a7 100644
--- a/palette/roles-dracula.conf
+++ b/palette/roles-dracula.conf
@@ -14,6 +14,10 @@ surface     = surface_mid
 surface_alt = current_line
 border      = current_line
 
+# The translucent ground behind a fullscreen overlay (power menu, screenshot
+# menu): the background, faded so the session shows through.
+scrim       = background/88
+
 fg          = foreground
 fg_dim      = comment
 fg_faint    = surface_high
diff --git a/palette/roles-frappe.conf b/palette/roles-frappe.conf
index dec2879..2fc4704 100644
--- a/palette/roles-frappe.conf
+++ b/palette/roles-frappe.conf
@@ -14,6 +14,10 @@ surface     = surface0
 surface_alt = surface1
 border      = surface1
 
+# The translucent ground behind a fullscreen overlay (power menu, screenshot
+# menu): the background, faded so the session shows through.
+scrim       = base/88
+
 # Text, brightest to dimmest.
 fg          = text
 fg_dim      = subtext0
diff --git a/palette/roles-macchiato.conf b/palette/roles-macchiato.conf
index aa34d7b..dcbe493 100644
--- a/palette/roles-macchiato.conf
+++ b/palette/roles-macchiato.conf
@@ -14,6 +14,10 @@ surface     = surface0
 surface_alt = surface1
 border      = surface1
 
+# The translucent ground behind a fullscreen overlay (power menu, screenshot
+# menu): the background, faded so the session shows through.
+scrim       = base/88
+
 # Text, brightest to dimmest.
 fg          = text
 fg_dim      = subtext0
diff --git a/palette/roles-material-darker.conf b/palette/roles-material-darker.conf
index bfbe8ae..4d5d50f 100644
--- a/palette/roles-material-darker.conf
+++ b/palette/roles-material-darker.conf
@@ -14,6 +14,10 @@ surface     = surface
 surface_alt = selection
 border      = mid_high
 
+# The translucent ground behind a fullscreen overlay (power menu, screenshot
+# menu): the background, faded so the session shows through.
+scrim       = background/88
+
 fg          = foreground
 fg_dim      = light
 fg_faint    = comment
diff --git a/palette/roles-material-ocean.conf b/palette/roles-material-ocean.conf
index 3e89c46..d3bf906 100644
--- a/palette/roles-material-ocean.conf
+++ b/palette/roles-material-ocean.conf
@@ -14,6 +14,10 @@ surface     = surface
 surface_alt = selection
 border      = mid_high
 
+# The translucent ground behind a fullscreen overlay (power menu, screenshot
+# menu): the background, faded so the session shows through.
+scrim       = background/88
+
 fg          = foreground
 fg_dim      = light
 fg_faint    = comment
diff --git a/palette/roles-material-palenight.conf b/palette/roles-material-palenight.conf
index 22edb5a..de42201 100644
--- a/palette/roles-material-palenight.conf
+++ b/palette/roles-material-palenight.conf
@@ -14,6 +14,10 @@ surface     = surface
 surface_alt = selection
 border      = mid_high
 
+# The translucent ground behind a fullscreen overlay (power menu, screenshot
+# menu): the background, faded so the session shows through.
+scrim       = background/88
+
 fg          = foreground
 fg_dim      = light
 fg_faint    = comment
diff --git a/palette/roles-mocha.conf b/palette/roles-mocha.conf
index 395955a..389d89d 100644
--- a/palette/roles-mocha.conf
+++ b/palette/roles-mocha.conf
@@ -14,6 +14,10 @@ surface     = surface0
 surface_alt = surface1
 border      = surface1
 
+# The translucent ground behind a fullscreen overlay (power menu, screenshot
+# menu): the background, faded so the session shows through.
+scrim       = base/88
+
 # Text, brightest to dimmest.
 fg          = text
 fg_dim      = subtext0
diff --git a/palette/roles-nord.conf b/palette/roles-nord.conf
index eac750a..5881ba6 100644
--- a/palette/roles-nord.conf
+++ b/palette/roles-nord.conf
@@ -14,6 +14,10 @@ surface     = nord1
 surface_alt = nord2
 border      = nord3
 
+# The translucent ground behind a fullscreen overlay (power menu, screenshot
+# menu): the background, faded so the session shows through.
+scrim       = nord0/88
+
 fg          = nord4
 fg_dim      = nord4
 fg_faint    = nord3
diff --git a/palette/roles-tokyo-night.conf b/palette/roles-tokyo-night.conf
index cd02e3c..5c9eb27 100644
--- a/palette/roles-tokyo-night.conf
+++ b/palette/roles-tokyo-night.conf
@@ -13,6 +13,10 @@ surface     = bg_highlight
 surface_alt = bg_visual
 border      = fg_gutter
 
+# The translucent ground behind a fullscreen overlay (power menu, screenshot
+# menu): the background, faded so the session shows through.
+scrim       = bg/88
+
 fg          = fg
 fg_dim      = fg_dark
 fg_faint    = comment