Content cleanup: fix unclosed tags, remove em/en dashes, verify translations

- Fixed 3 SI event posts that were missing their </article> and </main> tags
- Replaced all punctuation em-dashes and spaced en-dashes (435 across 64 files)
  with commas; normalized a SI date range to a hyphen to match EN/MK
- Verified the new Gallery + in-post gallery content is fully translated in
  EN/MK/SI (headings, titles, links, nav labels) with no English leftovers

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

si/legal/index.html

@@ -208,8 +208,8 @@
                     <div class="legal-row"><span class="k">Matična številka</span><span class="v">4128133000</span></div>
                     <div class="legal-row"><span class="k">Davčna številka</span><span class="v">44932448</span></div>
                     <div class="legal-row"><span class="k">Zavezanec za DDV</span><span class="v">Ne</span></div>
-                    <div class="legal-row"><span class="k">Glavna dejavnost (SKD)</span><span class="v">94.999 &ndash; Dejavnost drugje nerazvrščenih članskih organizacij</span></div>
-                    <div class="legal-row"><span class="k">Institucionalni sektor (SKIS)</span><span class="v">S.15000 &ndash; Nepridobitne institucije, ki opravljajo storitve za gospodinjstva</span></div>
+                    <div class="legal-row"><span class="k">Glavna dejavnost (SKD)</span><span class="v">94.999, Dejavnost drugje nerazvrščenih članskih organizacij</span></div>
+                    <div class="legal-row"><span class="k">Institucionalni sektor (SKIS)</span><span class="v">S.15000, Nepridobitne institucije, ki opravljajo storitve za gospodinjstva</span></div>
                     <div class="legal-row"><span class="k">Datum vpisa</span><span class="v">9. september 2024</span></div>
             </div>
             <div class="legal-card">