fix: convert canvas to static img + try 110m data

Canvas drawn once, converted to PNG data URL, displayed as <img>.
Also switched to 110m resolution to test if lines are data-related.

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

layouts/shortcodes/world-map.html

@@ -175,7 +175,7 @@
   }
 
   // Load data
-  fetch('{{ "data/countries-50m.json" | relURL }}')
+  fetch('{{ "data/countries-110m.json" | relURL }}')
     .then(function(r) { return r.json(); })
     .then(function(topo) {
       var geo = topojson.feature(topo, topo.objects.countries);
@@ -194,6 +194,16 @@
 
       sizeCanvas();
       drawMap();
+      // Convert canvas to static <img> to bypass GPU compositor tiling
+      setTimeout(function() {
+        var imgEl = document.createElement('img');
+        imgEl.src = canvas.toDataURL('image/png');
+        imgEl.id = 'ifk-map-img';
+        imgEl.style.cssText = 'position:absolute;top:0;left:0;width:100%;height:100%;display:block;';
+        container.appendChild(imgEl);
+        canvas.style.opacity = '0';
+        canvas.style.position = 'absolute';
+      }, 100);
     });
 
   // Resize handler