message: fix coarse seq label (index error)
diff: @@ -61,7 +61,7 @@ export function elementLabel(loc: Element.Location) {
  if (seq_id_begin === seq_id_end) {
  const entityKey = Props.coarse.entityKey(loc)
  const seq = loc.unit.model.sequence.byEntityKey[entityKey]
  - const comp_id = seq.compId.value(seq_id_begin)
  + const comp_id = seq.compId.value(seq_id_begin - 1) // 1-indexed
  element = `[${comp_id}]${seq_id_begin}:${asym_id}`
  } else {
  element = `${seq_id_begin}-${seq_id_end}:${asym_id}`
  