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>

agent/BACKLOG.md

@@ -175,13 +175,21 @@ palettes + visual pass over previews; identity-aware curation):**
 - **P2 · text-on-surface < 4.5:** ristretto 3.88, latte 4.39 (menus
   and chips draw text on surface).
 - **P3 · accentAlt-on-base < 3:** latte 2.34, summer-day 2.83.
-- **Design rule (systemic, beats palette surgery): status is never
-  color-only.** good/warn collapse under protanopia on ~half the
-  themes and good/bad under deuteranopia (59 pair-findings) — that's
-  inherent to red/green/yellow, not fixable per-palette. Battery and
-  recording already carry glyph changes; sweep the remaining
-  color-only indicators (updates count, notification dot, VPN shield
-  states) for shape/glyph redundancy.
+- ~~**Design rule (systemic): status is never color-only.**~~ ✓ swept
+  iteration #69 (2026-07-08). good/warn collapse under protanopia and
+  good/bad under deuteranopia is inherent to red/green/yellow, not
+  fixable per-palette — but the sweep found every Waybar status
+  indicator already carries non-color redundancy: **updates** shows a
+  count (`󰚰 N`) and self-hides; **vpn/doctor/nightlight/recording**
+  self-gate (presence *is* the state); **battery** changes glyph by
+  level + bolt-on-charge; **idle_inhibitor** (󰅶/󰾪) and
+  **pulseaudio.muted** (󰝟) are glyph-distinct. The one real gap: swaync
+  **inhibited-** states reused the normal bells (󰂜/󰂚), so "notifications
+  suppressed by an inhibitor" was distinguished from normal by *color
+  alone* — fixed by routing every suppressed state (DND or inhibited) to
+  the bell-off glyph + @muted, in the generated bar and all four
+  whole-swaps (parity). V3-pending: confirm the muted bell-off renders
+  while an app holds a notification inhibitor (HARDWARE-QUEUE).
 - **Identity exemptions, made explicit:** vantablack + white
   (deliberately hueless statuses), lumon (all-blue), hackerman
   (matrix green statuses), matte-black/retro-82 (off-family hues) are