fix(rolldown): avoid invalid comparison percentages

Author: webfansplz

packages/rolldown/src/app/components/display/ComparisonMetric.vue

@@ -7,7 +7,14 @@ const props = defineProps<{
 }>()
 
 const isNotChanged = computed(() => props.previous === props.current)
-const normalizedPercent = computed(() => Math.abs((props.current - props.previous) / props.previous * 100).toFixed(isNotChanged.value ? 0 : 2))
+const normalizedPercent = computed(() => {
+  if (isNotChanged.value)
+    return '0'
+  if (props.previous === 0)
+    return '100.00'
+
+  return Math.abs((props.current - props.previous) / props.previous * 100).toFixed(2)
+})
 const trendSymbol = computed(() => isNotChanged.value ? '' : (props.current > props.previous ? '+' : '-'))
 const comparisonColorClass = computed(() => isNotChanged.value ? 'text-gray-500' : (props.current > props.previous ? 'text-green-500' : 'text-red-500'))
 </script>