// Small presentation helpers shared across pages.

// trunc shortens a long hex key to head…tail for dense tables, keeping enough
// to recognize it while staying copy-friendly via the full value in a tooltip.
export function trunc(s: string, head = 10, tail = 6): string {
  if (!s) return "";
  if (s.length <= head + tail + 1) return s;
  return `${s.slice(0, head)}…${s.slice(-tail)}`;
}

// fmtTime renders an RFC3339 / ISO timestamp as a compact local datetime, or
// returns the raw string when it is not parseable.
export function fmtTime(s: string): string {
  if (!s) return "—";
  const d = new Date(s);
  if (Number.isNaN(d.getTime())) return s;
  return d.toLocaleString();
}