Fix: Dev-Lab Debugging-Pfad-Icon (</>-Marker HTML-escapen) + Cache-Buster v4

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

src/main/resources/static/js/devlab.js

@@ -30,7 +30,7 @@
     pathRoot.innerHTML = PATHS.map((p) => {
       const games = byPath[p.id] || [];
       return `<button type="button" class="dl-station${p.id === activeId ? ' active' : ''}" data-path="${p.id}">
-        <span class="dl-station-icon">${p.marker}</span>
+        <span class="dl-station-icon">${esc(p.marker)}</span>
         <span><h3>${esc(p.title)}</h3><p>${esc(p.copy)}</p>
           <span class="dl-station-meta"><span class="dl-chip">${games.length} Spiele</span><span class="dl-chip">${esc(p.type)}</span></span>
         </span></button>`;

src/main/resources/templates/devlab.html

@@ -117,6 +117,6 @@
     <a href="/impressum">Impressum</a>
   </footer>
 
-  <script src="/js/devlab.js?v=2" defer></script>
+  <script src="/js/devlab.js?v=4" defer></script>
 </body>
 </html>