Function nextIndex

apps/sim/hooks/use-smooth-text.ts:32–39

* Advance from `start` by `step(...)`, then extend up to 8 more characters to * land just past the next word/punctuation boundary so the reveal lands on a * whole word rather than mid-token.

(text: string, start: number)

 * whole word rather than mid-token.
 */
function nextIndex(text: string, start: number): number {
  const end = Math.min(text.length, start + step(text.length - start))
  const max = Math.min(text.length, end + 8)
  for (let i = end; i < max; i++) {
    if (SNAP.test(text[i] ?? '')) return i + 1
  }
  return end
}

/**
 * Content already longer than this when streaming begins is assumed to be