feat(news): add Meet Student Slovenia 2026 event page

Trilingual (EN/MK/SI) promo page for the upcoming "Meet Student Slovenia
2026" event, built through the content CMS (content/news/...) plus custom
sections styled to match the site.

- Guide-style centred header with a wide banner hero and caption
- Plain-background key facts (When/Where), subtle live-stream line,
  centred Register CTA, and partner/patron/sponsor logos
  (NLB Banka, Embassy of Slovenia; Capital Financial Center as text)
- Auto-scrolling "Moments from previous years" carousel + inline photos
- Embedded registration form (dropdowns, required study-plan fields,
  multi-field study preferences) wired to a Google Form; left-hand
  floating Register button
- Homepage promo banner (EN/MK/SI) + auto-listed in News hub, homepage
  latest, sitemap, llms.txt and the offline search index
- New assets: css/pages/_event.css, event-register.js

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

si/news/index.html

@@ -205,6 +205,17 @@
             </div>
             <div class="newshub-grid">
 <!-- AUTO-NEWS:START -->
+                <article class="newshub-card" data-type="news">
+                    <a class="newshub-media" href="/si/news/meet-student-slovenia-2026/">
+                        <img width="1920" height="1280" src="/images/event4-img-1.webp" alt="Študenti in govorci na dogodku „Spoznaj študentsko Slovenijo“ v Skopju" loading="lazy">
+                        <span class="news-badge news-badge--news"><i class="fas fa-bullhorn" aria-hidden="true"></i> Novica</span>
+                    </a>
+                    <div class="newshub-body">
+                        <p class="newshub-date">20. avgust 2026</p>
+                        <h3><a href="/si/news/meet-student-slovenia-2026/">Spoznaj študentsko Slovenijo 2026</a></h3>
+                        <p class="newshub-excerpt"></p>
+                    </div>
+                </article>
                 <article class="newshub-card" data-type="blog">
                     <a class="newshub-media" href="/si/blog/welcome-days-slovenian-universities-2026-2027/">
                         <img width="1600" height="1067" src="/images/event4-img-1.webp" alt="Novi študenti na uvajalnem dnevu univerze v Sloveniji" loading="lazy">