Fix Official information page: hero layout, short name, SKD activity

- Fix the hero: override the global flex-row .container so the eyebrow,
  title and lead stack and centre (they were laid out in a row)
- Short name -> "Društvo MŠOS za študentsko podporo in kulturno sodelovanje"
  (official kratki naziv, normal case) instead of "MSOS"
- Add the main activity row: SKD 94.999 (activities of other membership
  organisations n.e.c.), and relabel S.15000 as the institutional sector
  (SKIS). All three languages.

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

en/legal/index.html

@@ -197,7 +197,7 @@
             <div class="legal-card">
                 <h2>Organisation</h2>
                     <div class="legal-row"><span class="k">Legal name</span><span class="v">Društvo Makedonska Študentska Organizacija v Sloveniji za študentsko podporo in kulturno sodelovanje</span></div>
-                    <div class="legal-row"><span class="k">Short name</span><span class="v">MSOS</span></div>
+                    <div class="legal-row"><span class="k">Short name</span><span class="v">Društvo MŠOS za študentsko podporo in kulturno sodelovanje</span></div>
                     <div class="legal-row"><span class="k">Legal form</span><span class="v">Association (društvo)</span></div>
                     <div class="legal-row"><span class="k">Registered office</span><span class="v">Masarykova cesta 24, 1000 Ljubljana, Slovenia</span></div>
             </div>
@@ -206,7 +206,8 @@
                     <div class="legal-row"><span class="k">Registration number</span><span class="v">4128133000</span></div>
                     <div class="legal-row"><span class="k">Tax number</span><span class="v">44932448</span></div>
                     <div class="legal-row"><span class="k">VAT liable</span><span class="v">No</span></div>
-                    <div class="legal-row"><span class="k">Activity (SKIS)</span><span class="v">S.15000 &ndash; Non-profit institutions serving households</span></div>
+                    <div class="legal-row"><span class="k">Main activity (SKD)</span><span class="v">94.999 &ndash; Activities of other membership organisations n.e.c.</span></div>
+                    <div class="legal-row"><span class="k">Institutional sector (SKIS)</span><span class="v">S.15000 &ndash; Non-profit institutions serving households</span></div>
                     <div class="legal-row"><span class="k">Date of registration</span><span class="v">9 September 2024</span></div>
             </div>
             <div class="legal-card">