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/styles/motion.css

@@ -3,8 +3,10 @@
   Reduced-motion is a single global override — not per-component JS (ANIMATION_SPEC §1).
 */
 
-/* ---- Reveal (A2): opacity + 12px rise, staggered by --reveal-index ---- */
-[data-reveal] {
+/* ---- Reveal (A2): opacity + 12px rise, staggered by --reveal-index ----
+   Gated behind html.js so content stays visible with no JavaScript
+   (progressive enhancement — content is never hidden by animation). */
+html.js [data-reveal] {
   opacity: 0;
   transform: translateY(12px);
   transition:
@@ -12,7 +14,7 @@
     transform var(--dur-entrance) var(--ease-out);
   transition-delay: calc(var(--reveal-index, 0) * 60ms);
 }
-[data-reveal].is-revealed {
+html.js [data-reveal].is-revealed {
   opacity: 1;
   transform: none;
 }
@@ -68,7 +70,7 @@
 }
 
 /* ---- Timeline spine grow (A8) ---- */
-.timeline-spine {
+html.js .timeline-spine {
   transform: scaleY(0);
   transform-origin: top;
   transition: transform var(--dur-entrance) var(--ease-out);
@@ -118,14 +120,14 @@
     transition-duration: 1ms !important;
     scroll-behavior: auto !important;
   }
-  [data-reveal] {
-    opacity: 1;
-    transform: none;
+  html.js [data-reveal] {
+    opacity: 1 !important;
+    transform: none !important;
   }
   .trace-line {
     stroke-dashoffset: 0;
   }
   .timeline-spine {
-    transform: scaleY(1);
+    transform: scaleY(1) !important;
   }
 }