Integrate v3 master: residence and health cluster (Batch 1)

Rewrites the six residence/health pages (visa-and-residence-explained,
student-residence-permit, where-to-apply-for-residence,
means-accommodation-address, rm-si-3-health-insurance,
healthcare-in-slovenia) to the deeper v3 English master, trilingual.
Adds backward-compatible generator support for per-page hero-image
placeholders and a "Sources and further information" section, plus
.guide-last-checked styling. Owner decisions applied (student work on
the study permit vs employment permit; sufficient means shown as
"check current"). SI/MK bodies are MSOS working translations pending
native proofread.

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

en/student-welcome-guide/student-accommodation/index.html

@@ -183,13 +183,13 @@
             <div class="article-body">
                 <div class="guide-meta">
                     <span class="guide-tag ">Applies to: students from Macedonia</span>
-                    <span class="guide-tag ">Last checked: 29 July 2026</span>
+                    <span class="guide-tag ">Last checked: 30 July 2026</span>
                     <span class="guide-tag is-frequent">Update class: Frequently changing</span>
                 </div>
 
                 <aside class="guide-box guide-box--warning">
                     <p class="guide-box-title"><i class="fas fa-triangle-exclamation" aria-hidden="true"></i>Please verify the latest information</p>
-                    <p>This page was last checked on 29 July 2026 and applies to housing calls and prices in 2026/2027. Deadlines, fees, required documents, eligibility conditions, and administrative procedures may change. Verify the information directly with the responsible institution before submitting an application or making an important decision.</p>
+                    <p>This page was last checked on 30 July 2026 and applies to housing calls and prices in 2026/2027. Deadlines, fees, required documents, eligibility conditions, and administrative procedures may change. Verify the information directly with the responsible institution before submitting an application or making an important decision.</p>
                 </aside>
 
                 <h2>Critical eligibility distinction</h2>