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/test/slugMap.test.ts

@@ -0,0 +1,65 @@
+import { describe, it, expect } from 'vitest';
+import {
+  PAGE_IDS,
+  ROUTES,
+  pathFor,
+  pageIdFromPath,
+  localeFromPath,
+  twinPath,
+  allRoutes,
+} from '@i18n/slugMap';
+import { LOCALES } from '@i18n/locales';
+
+describe('slug map contract (ROUTING_SPEC §1, ARCHITECTURE A5)', () => {
+  it('every pageId has a path in both locales', () => {
+    for (const id of PAGE_IDS) {
+      for (const locale of LOCALES) {
+        const p = ROUTES[id][locale];
+        expect(p, `${id}.${locale}`).toMatch(/^\/.*\/$|^\/$/); // trailing slash canonical
+      }
+    }
+  });
+
+  it('all paths are unique (bijection — no two routes collide)', () => {
+    const paths = allRoutes().map((r) => r.path);
+    expect(new Set(paths).size).toBe(paths.length);
+  });
+
+  it('NO paths are prefixed with /no and use localised slugs', () => {
+    for (const id of PAGE_IDS) {
+      expect(ROUTES[id].no.startsWith('/no/') || ROUTES[id].no === '/no/').toBe(true);
+    }
+    expect(ROUTES.projects.no).toBe('/no/prosjekter/');
+    expect(ROUTES.homelab.no).toBe('/no/prosjekter/hjemmelab/');
+    expect(ROUTES.about.no).toBe('/no/om-meg/');
+  });
+
+  it('pageIdFromPath round-trips for every route', () => {
+    for (const id of PAGE_IDS) {
+      for (const locale of LOCALES) {
+        expect(pageIdFromPath(pathFor(id, locale))).toBe(id);
+      }
+    }
+  });
+
+  it('localeFromPath detects the locale', () => {
+    expect(localeFromPath('/projects/jobtrack/')).toBe('en');
+    expect(localeFromPath('/no/prosjekter/jobtrack/')).toBe('no');
+    expect(localeFromPath('/')).toBe('en');
+    expect(localeFromPath('/no/')).toBe('no');
+  });
+
+  it('twinPath maps a page to its twin locale and back', () => {
+    for (const id of PAGE_IDS) {
+      const en = pathFor(id, 'en');
+      const no = pathFor(id, 'no');
+      expect(twinPath(en, 'no')).toBe(no);
+      expect(twinPath(no, 'en')).toBe(en);
+    }
+  });
+
+  it('twinPath falls back to the target home for unmapped paths', () => {
+    expect(twinPath('/nonsense/', 'no')).toBe('/no/');
+    expect(twinPath('/no/tull/', 'en')).toBe('/');
+  });
+});