test: vitest unit + playwright e2e suites; fix a11y, contrast, no-JS reveal

- vitest: dictionary parity, slug-map bijection, content-schema validation, JSON-LD (23)
- playwright: both locales, language-switch mapping (incl. no-JS), CV downloads,
  form happy-path + honeypot, axe a11y on 5 templates x 2 themes (23)
- fix: raise ink-faint + light accent to meet WCAG AA 4.5:1 (axe-verified)
- fix: gate reveal animations behind html.js so content is visible without JS
  (progressive enhancement - was hidden at opacity 0); scan reduced-motion path
- fix: validate contact form before the anti-bot time-trap (no false success)
- chore: ESLint node globals, typed diagram props, resvg fontFiles, prettier pass

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

site/src/components/home/ProofStrip.astro

@@ -11,9 +11,9 @@ const { profile } = Astro.props;
   <ul class="grid grid-cols-2 gap-4 lg:grid-cols-4">
     {
       profile.proof.map((tile) => (
-        <li class="rounded-md border border-line bg-surface-1 p-5">
-          <p class="font-display text-[22px] font-semibold leading-tight text-ink">{tile.stat}</p>
-          <p class="mt-2 font-mono text-mono-label font-medium uppercase tracking-[0.08em] text-ink-faint">
+        <li class="border-line bg-surface-1 rounded-md border p-5">
+          <p class="font-display text-ink text-[22px] leading-tight font-semibold">{tile.stat}</p>
+          <p class="text-mono-label text-ink-faint mt-2 font-mono font-medium tracking-[0.08em] uppercase">
             {tile.label}
           </p>
         </li>