fix(gtk): scope the #98 button-label pin to dialogs — it was repainting the bar

The bare `button, button label` selectors in the #98 safety net load
into every GTK3 process, including Waybar, and a rule matching the label
node outranks the color waybar.css inherits onto `#workspaces button` —
so workspace digits always rendered the gtk.css text color captured at
bar start, never the theme's @muted dots / @base-on-accent active pill
(the pair check-theme-contrast.py gates). With the bar never restarting
on switch (previous commit) the pin also went stale: all three 2026-07-18
screenshots carried kiln-clay's @text #39302A across three dark themes.
Scoped the enabled+disabled pins to the dialog selectors #98 actually
targeted; forcing adw-gtk3-dark remains the primary #98 fix, and the
sheet's own bare `label` rule sets only caret-color, so inheritance
carries the bar colors again.

Verified live on Newton (V3-grade): under the scoped gtk.css, boreal
renders the designed digits — @base #21272F on the @accent pill, @muted
#5E6A78 inactives — pixel-sampled from a bar spawned on a headless
output. V1: HM generation builds; bare selectors absent from the built
gtk.css, dialog-scoped ones present. Journal, hardware-queue (deploy
round-trip) and ROADMAP follow-up ride along.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

agent/HARDWARE-QUEUE.md

@@ -616,6 +616,15 @@ Everything else below stays open; order is convenience, not a gate.
       Acer's own fontconfig/DPI resolving `ch` the same way — try it under a
       **JetBrainsMono 14 theme** (summer-day/night, kanagawa), the widest case.
 
+- [ ] **Theme-switch bar round-trip (2026-07-19 waybar-poke + gtk-pin fix)** —
+      after `nomarchy-pull` + `nomarchy-home`, switch dark → light → dark
+      (e.g. boreal → kiln-clay → kiln). Pass = the bar visibly restarts on
+      each switch and the workspace digits land per theme (dark-on-accent
+      active pill, dimmed inactives on dark themes) with no color carried
+      over from the previous theme; then start/stop a screen recording and
+      toggle airplane mode — the supervisor must survive both pokes
+      (`pgrep -lx nomarchy-waybar` still lists it).
+
 ## Latitude 5310 / 5410 only
 - [ ] **v1 QA batch on-hardware pass** (583708d batch was QEMU-verified) —
       general smoke before the next `main → v1` promotion (broader than