feat: y-axis SI prefix, hide tick from legend, fix table sort

web/lib/formatNumber.ts

@@ -0,0 +1,22 @@
+const SI_THRESHOLDS = [
+  { limit: 1_000_000_000, divisor: 1_000_000_000, suffix: 'G' },
+  { limit: 1_000_000, divisor: 1_000_000, suffix: 'M' },
+  { limit: 1_000, divisor: 1_000, suffix: 'K' },
+] as const;
+
+export function formatSI(v: number, locale?: string): string {
+  const abs = Math.abs(v);
+  for (const { limit, divisor, suffix } of SI_THRESHOLDS) {
+    if (abs >= limit) {
+      const formatted = new Intl.NumberFormat(locale, {
+        maximumFractionDigits: 3,
+        minimumFractionDigits: 0,
+      }).format(v / divisor);
+      return `${formatted}${suffix}`;
+    }
+  }
+  return new Intl.NumberFormat(locale, {
+    maximumFractionDigits: 0,
+    minimumFractionDigits: 0,
+  }).format(v);
+}