feat(hyprdrive/dunst): holographic notification theme + radio-squiggle divider

Themes dunst in the astro-menu idiom: emitted-magenta text, violet holo-glass
backgrounds (transparent for the compositor blur), glow-violet/accent frames,
Agave Nerd Font Mono, and a "radio squiggle" sine-wave divider between title and
body. (Superseded by the beacon daemon in a following commit, but kept as themed
fallback config.)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

desktopenvs/hyprdrive/dunst/dunstrc

@@ -107,7 +107,12 @@
     frame_width = 3
 
     # Defines color of the frame around the notification window.
-    frame_color = "#5018DD"
+    # Bright "glow" violet (astro-menu's glow_violet) rather than the raw @violet —
+    # reads as emitted light over the blurred glass, since dunst can't Cairo-glow.
+    frame_color = "#8A5CFF"
+
+    # Progress-bar fill: violet -> accent gradient, same sweep as the menus.
+    highlight = "#8A5CFF, #EB00A6"
 
     # Size of gap to display between notifications - requires a compositor.
     # If value is greater than 0, separator_height will be ignored and a border
@@ -140,7 +145,7 @@
 
     ### Text ###
 
-    font = Agave Nerd Font 12
+    font = Agave Nerd Font Mono 11
 
     # The spacing between lines.  If the height is smaller than the
     # font height, it will get raised to the font height.
@@ -179,8 +184,12 @@
     #   %p  progress value if set ([  0%] to [100%]) or nothing
     #   %n  progress value if set without any extra characters
     #   %%  Literal %
-    # Markup is allowed
+    # Markup is allowed.
-    format = "<b>%s</b>\n%b"
+    # Cosmonaut Shell / astro-menu hologram idiom: the title as emitted magenta
+    # light (letter-spaced, like the astro HUD headlines), then a glow-violet
+    # "radio squiggle" divider (a sine-wave line, like a tuned signal), then the
+    # body. urgency_critical overrides this to shift title+squiggle to the accent.
+    format = "<b><span letter_spacing='1536'>%s</span></b>\n<span foreground='#8A5CFF' size='small' rise='2000'>∿∿∿∿∿∿∿∿∿∿∿∿∿∿</span>\n%b"
 
     # Alignment of message text.
     # Possible values are "left", "center" and "right".
@@ -334,29 +343,39 @@
     per_monitor_dpi = false
 
 
+# astro-menu hologram idiom (see astro-menu/style/style.css):
+#   emitted text = magenta #EB00A6 (glow_magenta), glass = violet-tinted + very
+#   transparent so the compositor blur reads as projected glass, glow frame =
+#   #8A5CFF (glow_violet), accent = #E40046. The astro panel gets its depth from
+#   Cairo scanlines/glow dunst can't draw, so we lean on colour + blur instead.
+
 [urgency_low]
     # IMPORTANT: colors have to be defined in quotation marks.
     # Otherwise the "#" and following would be interpreted as a comment.
-    background = "#1a1a1a"
+    # Violet-tinted glass, ~63% opaque (…A0) so the blur reads as strong holo glass.
-    foreground = "#5018dd"
+    background = "#1C1442A0"
-    frame_color = "#5018dd"
+    foreground = "#EB00A6"
+    frame_color = "#8A5CFF"
     timeout = 10
     # Icon for notifications with low urgency
     default_icon = dialog-information
 
 [urgency_normal]
-    background = "#1a1a1a"
+    background = "#1C1442A0"
-    foreground = "#E40046"
+    foreground = "#EB00A6"
-	frame_color = "#5018dd"
+    frame_color = "#8A5CFF"
     timeout = 10
     override_pause_level = 30
     # Icon for notifications with normal urgency
     default_icon = dialog-information
 
 [urgency_critical]
-    background = "#E40046"
+    # Accent-tinted violet glass + accent glow frame; emitted magenta text stays.
-    foreground = "#5018dd"
+    background = "#2E1030A0"
-    frame_color = "#5018dd"
+    foreground = "#EB00A6"
+    frame_color = "#E40046"
+    # Shift the title + squiggle to the accent so they match the critical frame.
+    format = "<b><span letter_spacing='1536' foreground='#E40046'>%s</span></b>\n<span foreground='#E40046' size='small' rise='2000'>∿∿∿∿∿∿∿∿∿∿∿∿∿∿</span>\n%b"
     timeout = 0
     override_pause_level = 60
     # Icon for notifications with critical urgency