Function TranscriptSearchBar

src/screens/REPL.tsx:368–472

less-style / bar. 1-row, same border-top styling as TranscriptModeFooter * so swapping them in the bottom slot doesn't shift ScrollBox height. * useSearchInput handles readline editing; we report query changes and * render the counter. Incremental — re-search + highlight per keystroke.

({
  jumpRef,
  count,
  current,
  onClose,
  onCancel,
  setHighlight,
  initialQuery
}: {
  jumpRef: RefObject<JumpHandle | null>;
  count: number;
  current: number;
  /** Enter — commit. Query persists for n/N. */
  onClose: (lastQuery: string) => void;
  /** Esc/ctrl+c/ctrl+g — undo to pre-/ state. */
  onCancel: () => void;
  setHighlight: (query: string) => void;
  // Seed with the previous query (less: / shows last pattern). Mount-fire
  // of the effect re-scans with the same query — idempotent (same matches,
  // nearest-ptr, same highlights). User can edit or clear.
  initialQuery: string;
})

 *  useSearchInput handles readline editing; we report query changes and
 *  render the counter. Incremental — re-search + highlight per keystroke. */
function TranscriptSearchBar({
  jumpRef,
  count,
  current,
  onClose,
  onCancel,
  setHighlight,
  initialQuery
}: {
  jumpRef: RefObject<JumpHandle | null>;
  count: number;
  current: number;
  /** Enter — commit. Query persists for n/N. */
  onClose: (lastQuery: string) => void;
  /** Esc/ctrl+c/ctrl+g — undo to pre-/ state. */
  onCancel: () => void;
  setHighlight: (query: string) => void;
  // Seed with the previous query (less: / shows last pattern). Mount-fire
  // of the effect re-scans with the same query — idempotent (same matches,
  // nearest-ptr, same highlights). User can edit or clear.
  initialQuery: string;
}): React.ReactNode {
  const {
    query,
    cursorOffset
  } = useSearchInput({
    isActive: true,
    initialQuery,
    onExit: () => onClose(query),
    onCancel
  });
  // Index warm-up runs before the query effect so it measures the real
  // cost — otherwise setSearchQuery fills the cache first and warm
  // reports ~0ms while the user felt the actual lag.
  // First / in a transcript session pays the extractSearchText cost.
  // Subsequent / return 0 immediately (indexWarmed ref in VML).
  // Transcript is frozen at ctrl+o so the cache stays valid.
  // Initial 'building' so warmDone is false on mount — the [query] effect
  // waits for the warm effect's first resolve instead of racing it. With
  // null initial, warmDone would be true on mount → [query] fires →
  // setSearchQuery fills cache → warm reports ~0ms while the user felt
  // the real lag.
  const [indexStatus, setIndexStatus] = React.useState<'building' | {
    ms: number;
  } | null>('building');
  React.useEffect(() => {
    let alive = true;
    const warm = jumpRef.current?.warmSearchIndex;
    if (!warm) {
      setIndexStatus(null); // VML not mounted yet — rare, skip indicator
      return;
    }
    setIndexStatus('building');
    warm().then(ms => {
      if (!alive) return;
      // <20ms = imperceptible. No point showing "indexed in 3ms".
      if (ms < 20) {
        setIndexStatus(null);