draw hashbadge via raf

ui/src/components/HashBadge.svelte

@@ -22,7 +22,7 @@
     }
 
     let idx = 0;
-    while (bytes.length > 0) {
+    function draw() {
       const tmp = [];
       while (bytes.length > 0 && tmp.length < 3) {
         tmp.push(bytes.shift());
@@ -37,7 +37,12 @@
       ctx.fillStyle = `rgb(${r},${g},${b})`;
       ctx.fillRect(Math.floor(idx / BADGE_HEIGHT), idx % BADGE_HEIGHT, 1, 1);
       idx++;
+      if (bytes.length > 0) {
+        requestAnimationFrame(draw);
+      }
     }
+
+    requestAnimationFrame(draw);
   });
 </script>