Add full trilingual EN/FR/NB support across all pages and data

- Convert all data files (site, profile, norway, jazz, projects, cv) to Record<LocaleCode, string> fields
- Update all page templates to use LocaleCopy component for locale-aware rendering
- Fix CSS specificity conflict: .locale-copy .locale-copy__text (spec 20) now beats container span rules (spec 11)
- Update LocaleSwitcher, BaseLayout, and SectionCard for locale prop types
- Design system overhaul: Special Elite font, burgundy #8f2218, DG seal favicon

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/pages/writing.astro

@@ -8,6 +8,18 @@ import BaseLayout from "../layouts/BaseLayout.astro";
   description="A live writing desk fed from the PHP archive: Boris Vian, Vernon Sullivan weather, jazz syntax, and pataphysical essays."
 >
   <main class="writing-page">
+    <section class="container writing-feature" style="margin-bottom: 0; padding-bottom: 0;">
+      <article class="panel jazz-article" style="margin-bottom: var(--space-md, 1.5rem);">
+        <div class="capsule__kicker">
+          <span>Latest piece</span>
+          <span>May 2026</span>
+        </div>
+        <h2 style="margin-top: 0.5rem;">L'Homme Impossible</h2>
+        <p style="font-style: italic; margin-bottom: 0.75rem;">A Guide to Boris Vian and the Collège de 'Pataphysique</p>
+        <p>He was a trained engineer who played trumpet in a cellar with Miles Davis, wrote ten novels before his fortieth birthday, and became a Transcendent Satrap of an institution dedicated to deliberate uselessness.</p>
+        <a class="button button--dark" href="/articles/boris-vian-2026/">Read the introduction</a>
+      </article>
+    </section>
     <WritingIssue client:load />
   </main>
 </BaseLayout>