How to format transcripts (GAT Style)

Questions
4

So I played around with this a bit and got something I can live with:

#show raw.where(lang: "transcript"): it => {
  
  let (lines, ..fields) = it.fields()

  let is-speaker(line) = {
    let t = line.trim()
    t.ends-with(":")
  }

  let speaker-name(line) = {
    line.trim().slice(0, -1)
  }

  assert(
    lines.len() > 0 and is-speaker(lines.first().text),
    message: "transcript must start with a speaker label"
  )

  let rows = ()

  let current-speaker = speaker-name(lines.first().text + ":")
  let first-line = true

  for line in lines.slice(1) {
    let txt = line.text

    if is-speaker(txt) {
      current-speaker = speaker-name(txt) + ":"
      first-line = true
      continue
    }

    rows.push((
      if first-line { current-speaker } else { "" },
      txt,
    ))

    first-line = false
  }

  let speaker-width = calc.max(
    2pt,
    ..rows.map(r => measure(text(r.at(0))).width),
  )

  set par(leading: 1.15em)
  set par(spacing: 0pt)
  
  set par.line(numbering: n => str(n))  

  grid(stroke: none,
    columns: (speaker-width, 1fr),
    column-gutter: 1em,
    row-gutter: 1.15em,

    ..rows.map(((speaker, txt)) => (
      [#speaker],
      [#txt],
    )).flatten(),

    
  )


}

Question

Is there a way to reset the line counter after each transcript? I tried this but couldn’t get it to work: