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/MEMORY.md

@@ -62,6 +62,15 @@ iteration would otherwise rediscover.
   state write re-copies the source before eval — the wallpapers-artifact
   split (BACKLOG LATER) is the decided fix (§ Faster switches).
 
+## Design invariants
+- **Waybar status is never color-only** (item 28 sweep, iteration #69):
+  every status module must distinguish its states by SHAPE (glyph) or
+  presence (self-hide), never color alone — good/warn/bad collapse under
+  color-blindness. When adding a state, give it a distinct glyph or gate
+  the module on it; a new `class` that only recolors an existing glyph is
+  a regression. Suppressed notification states (DND *and* app-inhibited)
+  all use the bell-off glyph + @muted.
+
 ## Gotchas (cost a debugging session once)
 - Waybar `layer: top` renders above **even real-fullscreen windows** — the
   bar draws over a fullscreen video. `layer: bottom` lets the fullscreen