changes.txt #6: sync homepage "Latest news" from the News hub

Add tools/build_listings.py: copies the top 3 cards from each language's News
hub into the homepage "Latest news" block (marker-wrapped), so editing the News
page now updates the homepage. The News hub stays the hand-edited source of truth
(it may hold curated teaser cards without a detail page).

Also: fix the Gallery meta description (was a copy of the FAQ text) and add a
durable gallery override to seo_inject.py; refresh llms.txt / links-for-bots.

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

en/index.html

@@ -307,6 +307,7 @@
                 <p>What is new at MSOS, from events and projects to blog stories and announcements.</p>
             </div>
             <div class="news-articles">
+                <!-- AUTO-LATEST-NEWS:START (generated from en/news/ by tools/build_listings.py — edit the News page, not here) -->
                 <article class="news-card" data-type="news">
                     <a class="news-card-media" href="../en/news/proof-of-means-updated-2026/">
                         <img width="1600" height="1067" src="../images/news-proof-of-means.webp" alt="Proof-of-means amount updated to €507,43 per month" loading="lazy">
@@ -337,6 +338,7 @@
                         <h3><a href="../en/news/">Join our welcome week for new students</a></h3>
                     </div>
                 </article>
+                <!-- AUTO-LATEST-NEWS:END -->
             </div>
             <a href="../en/news/" class="btn btn-secondary">See all</a>
         </section>