Update proof-of-means to 507,43 EUR, add announcement page, European number format (EN)

- Update the residence-permit "sufficient means" figure to 507,43 EUR/month
  (Slovenian basic minimum income from 1 April 2026, source gov.si) across the
  guide, FAQ, budget note, sample parent statement and my-route tip; replaces
  the old 484,88 everywhere.
- New standalone news announcement page /<lang>/news/proof-of-means-updated-2026/
  (trilingual), published 1 August 2026, with a clickable gov.si source box and a
  hero image (Pixabay, credited). news.js now supports announcement items
  (slug + body) and shows them newest-first on the homepage and News hub; the
  image doubles as the card thumbnail. Optimised 6.98MB to 255KB.
- Switch English EUR amounts to European format (comma decimal, dot thousands):
  507,43 / 9.600 / 1.000 etc. Only euro-prefixed amounts are touched, so SI/MK
  (which use a euro suffix) are unaffected. New generator eurofmt.js.

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

en/timeline-and-milestones/index.html

@@ -399,7 +399,7 @@
                         <div class="timeline-content">
                             <p class="timeline-date">March-April 2025</p>
                             <h3>Solidarity for Kočani in difficult times</h3>
-                            <p>In March and April 2025, MSOS stood together with the Macedonian community after the tragic events in Kočani. In Ljubljana, more than 700 people gathered in a peaceful vigil, filling the city square with candles and compassion. Soon after, our team in Maribor organized a charity basketball and football tournament, raising over €1,000 to support the families whose children were receiving treatment in Slovenia.</p>
+                            <p>In March and April 2025, MSOS stood together with the Macedonian community after the tragic events in Kočani. In Ljubljana, more than 700 people gathered in a peaceful vigil, filling the city square with candles and compassion. Soon after, our team in Maribor organized a charity basketball and football tournament, raising over €1.000 to support the families whose children were receiving treatment in Slovenia.</p>
                             <p>These moments reminded us that MSOS is not only about projects and events, but also about solidarity, empathy, and standing by our people in difficult times.</p>
                         </div>
                     </div>