reorg again, absolute (module) imports

app/util/formatDuration.ts

@@ -0,0 +1,13 @@
+function formatDuration(seconds: number): string {
+  const s = Math.floor(seconds) % 60
+  const m = Math.floor(seconds / 60) % 60
+  const h = Math.floor(seconds / 60 / 60)
+
+  let time = `${m.toString().padStart(1, '0')}:${s.toString().padStart(2, '0')}`
+  if (h > 0) {
+    time = `${h}:${time}`
+  }
+  return time
+}
+
+export default formatDuration