fix: cache-busting CSS URL + named function init for map/charts

CSS link now includes ?v=timestamp to bust browser cache.
Map/charts use named functions instead of IIFEs (minifier safe).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

layouts/shortcodes/world-map.html

@@ -34,9 +34,9 @@
 <script src="{{ "js/maplibre-gl.min.js" | relURL }}"></script>
 <script src="{{ "js/topojson-client.min.js" | relURL }}"></script>
 <script>
-(function initMap() {
+function ifkInitMap() {
   if (typeof maplibregl === 'undefined' || typeof topojson === 'undefined') {
-    setTimeout(initMap, 100);
+    setTimeout(ifkInitMap, 100);
     return;
   }
   var LANG = "{{ $lang }}";
@@ -127,5 +127,6 @@
         });
       });
   });
-})();
+}
+ifkInitMap();
 </script>