fix(a11y): Aktualisiert badge passes WCAG AA contrast

text-ink-3 on bg-ink-3/10 (low-saturation grey on lighter grey) gave
roughly 2.8:1 contrast — below the 4.5:1 AA threshold for normal-weight
small text. Switching the foreground to text-ink-1 keeps the muted
background but lifts the text contrast well above 7:1.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

frontend/src/lib/shared/dashboard/ReaderRecentDocs.svelte

@@ -40,7 +40,7 @@ function isNew(doc: Document): boolean {
 								</span>
 							{:else}
 								<span
-									class="rounded bg-ink-3/10 px-1.5 py-0.5 font-sans text-xs font-bold tracking-wide text-ink-3 uppercase"
+									class="text-ink-1 rounded bg-ink-3/10 px-1.5 py-0.5 font-sans text-xs font-bold tracking-wide uppercase"
 								>
 									{m.dashboard_badge_updated()}
 								</span>