fix(a11y): WCAG AA contrast retune for the Otter Orange palette (#567)

Fixes #557. Vivid fill, ink label: brand #E07832 stays on fills while primary-foreground flips to #1A1814 (5.83:1); new theme-aware ink tokens carry orange, destructive, and success text roles; opacity-modified text purged; landing, demo, and the docs fund button retuned. Guarded by a CSS-parsing unit contrast test, rebuilt axe baselines with zero contrast entries, a new landing axe smoke, and fully regenerated darwin visual baselines.

apps/web/src/components/common/progress-card.tsx

@@ -43,7 +43,7 @@ export function ProgressCard({ active, phase, label, stage, percent, elapsed }:
           <div className="text-sm font-medium text-foreground truncate">{label}</div>
           <div className="text-[11px] text-muted-foreground truncate">{sublabel}</div>
         </div>
-        <span className="text-sm font-semibold text-primary font-mono tabular-nums">
+        <span className="text-sm font-semibold text-primary-ink font-mono tabular-nums">
           {Math.round(percent)}%
         </span>
       </div>