fix(waybar): inhibited notification state reads by shape, not color alone

Item 28 color-only accessibility sweep. Swept every Waybar status
indicator for shape/glyph redundancy: all already carry non-color
distinction (updates shows a count + self-hides; vpn/doctor/nightlight/
recording self-gate; battery/idle/muted are glyph-distinct) except the
swaync notification module — its `inhibited-*` states reused the normal
bells (󰂜/󰂚), so an app-inhibited (suppressed) state was distinguished
from a normal one by color alone.

Route every suppressed state (DND + inhibited) to the bell-off glyph 󰂛
+ @muted, so "notifications are off right now" reads by SHAPE. Applied
to the generated bar and all four whole-swaps (summer-day/night use
their own bell-off glyph; executive-slate/boreal use 󰂛) — parity rule.
Reuses the glyph DND already ships, so no new codepoint / tofu risk.

Verified: V0 (flake check --no-build; 4 jsoncs valid JSON) + V1 (built
homeConfigurations.nomarchy.activationPackage — the built config has
inhibited-* = U+F009B and style.css routes .inhibited-* → @muted).
V3 pending: live inhibited-state render with an app holding an inhibitor
(HARDWARE-QUEUE). MEMORY gains the "status is never color-only" invariant.

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

modules/home/waybar.nix

@@ -291,7 +291,10 @@ let
     # swaync notification bell + Do-Not-Disturb state. `-swb` streams JSON
     # (text/tooltip/class) on every change, so it tracks count and DND with
     # no polling. Left-click toggles the panel; right-click toggles DND.
-    # The `dnd-*` classes (bell-off glyph) are styled muted below.
+    # Every *suppressed* state — DND or app-inhibited — maps to the bell-off
+    # glyph 󰂛 and the muted color below, so "notifications are off right now"
+    # reads by SHAPE, not color alone (color-blind sweep, item 28): inhibited
+    # used to reuse the normal 󰂜/󰂚 bells, distinguishable only by color.
     "custom/notification" = {
       exec = "swaync-client -swb";
       return-type = "json";
@@ -302,8 +305,8 @@ let
         notification = "󰂚";
         dnd-none = "󰂛";
         dnd-notification = "󰂛";
-        inhibited-none = "󰂜";
-        inhibited-notification = "󰂚";
+        inhibited-none = "󰂛";
+        inhibited-notification = "󰂛";
         dnd-inhibited-none = "󰂛";
         dnd-inhibited-notification = "󰂛";
       };
@@ -405,10 +408,13 @@ let
        size them up a touch more so they read at a glance. */
     #custom-powerprofile, #idle_inhibitor { font-size: ${toString (t.fonts.size + 3)}pt; }
 
-    /* notifications waiting → accent; Do-Not-Disturb → muted bell-off */
+    /* notifications waiting → accent; suppressed (DND or app-inhibited) →
+       muted bell-off, so it reads by shape+color, never color alone. */
     #custom-notification.notification { color: @accent; }
     #custom-notification.dnd-none,
-    #custom-notification.dnd-notification { color: @muted; }
+    #custom-notification.dnd-notification,
+    #custom-notification.inhibited-none,
+    #custom-notification.inhibited-notification { color: @muted; }
 
     #pulseaudio.muted { color: @muted; }
     #battery.warning { color: @warn; }