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>

tests/package.json

@@ -0,0 +1,13 @@
+{
+  "name": "resumesite-e2e",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "test:e2e": "playwright test",
+    "install-browsers": "playwright install --with-deps chromium"
+  },
+  "devDependencies": {
+    "@axe-core/playwright": "^4.10.1",
+    "@playwright/test": "^1.50.1"
+  }
+}