fix(theme): text on glass holds 4.5:1 — light --muted kept at 6:1 on the page, tonal fills opaque

Pixel-measured over every scheme x mode x backdrop: the item count fell to 3.8:1 (dark too: its 8%
fill let the toolbar glass and the thumbnails under it through), Channels' tabs to 4.1:1 and the
current Files row to 4.4:1. Light --muted moves 15% toward --fg in every scheme; the badges, the item
count and the current rail row paint opaque bg-tint* fills mixed into the surface. The token contract
now asks 6:1 of --muted on the bare page and checks those three sites use the tints.

frontend/src/components/ui/ItemCount.tsx

@@ -8,7 +8,8 @@ import { formatNumber } from "../../lib/format";
 const OVERFLOW_AT = 1_000_000;
 
 // A compact, FIXED-WIDTH count pill for a toolbar: the filtered item count at the toolbar's 28, flat
-// and tonal like a `Badge` — no edge, because it does nothing (edged = pressable, flat = just
+// and tonal like a `Badge` (the same opaque `bg-tint`: the toolbar is glass over scrolling thumbnails)
+// — no edge, because it does nothing (edged = pressable, flat = just
 // says; it used to wear the filter dropdowns' glass pill and read as one more). The fixed width is the point — a
 // changing number must never shove the controls beside it, so the box is sized to the widest value
 // ("999,999 items") and the content is centred within it. A count of a million or more collapses to
@@ -46,7 +47,7 @@ export default function ItemCount({
         failed ? t("common.countFailed") : count == null ? undefined : formatNumber(count, lang)
       }
       aria-busy={stale || undefined}
-      className="inline-flex h-7 min-w-[9rem] shrink-0 items-center justify-center gap-1.5 rounded-full bg-fg/8 px-3 text-sm whitespace-nowrap text-muted"
+      className="inline-flex h-7 min-w-[9rem] shrink-0 items-center justify-center gap-1.5 rounded-full bg-tint px-3 text-sm whitespace-nowrap text-muted"
     >
       <Layers className="h-3.5 w-3.5 shrink-0 text-muted" aria-hidden="true" />
       <span className={clsx("tabular-nums transition-opacity", stale && "opacity-60")}>