[chore] used codex to create a base layout for src

src/shared/time/format.ts

@@ -0,0 +1,17 @@
+type DurationLike = {
+  secs?: number;
+  nanos?: number;
+};
+
+export function formatDuration(value: DurationLike): string {
+  const totalSeconds = Math.max(0, Math.floor(value.secs ?? 0));
+  const hours = Math.floor(totalSeconds / 3600)
+    .toString()
+    .padStart(2, "0");
+  const minutes = Math.floor((totalSeconds % 3600) / 60)
+    .toString()
+    .padStart(2, "0");
+  const seconds = (totalSeconds % 60).toString().padStart(2, "0");
+
+  return `${hours}:${minutes}:${seconds}`;
+}