Locale bar full labels + broader FR/NB translation pass

- Locale bar now shows "EN edition / Cahier FR / NB utgave" (via localeMeta) instead of just EN/FR/NO
- Increase locale bar button size (font-size 0.88rem, padding 0.4/1.1rem, height 46px)
- education.astro: translate hero eyebrow, h1, lede, editorial note, bullets
- writing.astro: translate Boris Vian feature panel (title, subtitle, body, CTA)
- business.astro: translate AI Bubble feature panel (title, subtitle, body, CTA)
- boris-vian-2026.astro: translate eyebrow, sidebar, article kicker, source credits
- kongsberg-jazz-2026.astro: translate eyebrow, sidebar, field report labels, cross-promo, source credits
- ai-bubble-2026.astro: translate eyebrow, sidebar, field report labels, source credits
- Add untracked data files ai-bubble.ts and boris-vian.ts

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

src/layouts/BaseLayout.astro

@@ -5,7 +5,7 @@ import LocaleCopy from "../components/LocaleCopy.astro";
 import LocaleSwitcher from "../components/LocaleSwitcher.astro";
 import SectionMark from "../components/SectionMark.astro";
 import { getSectionHref, launchSections } from "../data/site";
-import { footerCallouts, getChromeCopy, localizedSections, policyLinkCopy } from "../data/locales";
+import { footerCallouts, getChromeCopy, localeMeta, localizedSections, policyLinkCopy } from "../data/locales";
 
 interface Props {
   title?: string;
@@ -84,15 +84,15 @@ const chromeCopy = getChromeCopy({ activeSlug, issueDate, articleKey });
     <div class="locale-bar" role="navigation" aria-label="Language selection">
       <div class="locale-bar__inner">
         <button type="button" class="locale-bar__btn" data-lang-button="en" aria-pressed="true">
-          🇬🇧 <span>EN</span>
+          🇬🇧 <span>{localeMeta.en.switcher}</span>
         </button>
         <span class="locale-bar__sep" aria-hidden="true">·</span>
         <button type="button" class="locale-bar__btn" data-lang-button="fr" aria-pressed="false">
-          🇫🇷 <span>FR</span>
+          🇫🇷 <span>{localeMeta.fr.switcher}</span>
         </button>
         <span class="locale-bar__sep" aria-hidden="true">·</span>
         <button type="button" class="locale-bar__btn" data-lang-button="nb" aria-pressed="false">
-          🇳🇴 <span>NO</span>
+          🇳🇴 <span>{localeMeta.nb.switcher}</span>
         </button>
       </div>
     </div>