message: Monitoring Dashboards: Fix stack chart Y axis when all values are zero
  The stack chart Y axis should have the range [-1, 1] when all values are
  zero. This matches the behavior of the line (non-stack) chart.
diff: @@ -241,7 +241,15 @@ const Graph: React.FC<GraphProps> = React.memo(
  let yTickFormat = formatValue;
  - if (!isStack) {
  + if (isStack) {
  + // Specify Y axis range if all values are zero, but otherwise let Chart set it automatically
  + const isAllZero = _.every(allSeries, (series) =>
  + _.every(series, ([, values]) => _.every(values, { y: 0 })),
  + );
  + if (isAllZero) {
  + domain.y = [-1, 1];
  + }
  + } else {
  // Set a reasonable Y-axis range based on the min and max values in the data
  const findMin = (series: GraphDataPoint[]) => _.minBy(series, 'y');
  const findMax = (series: GraphDataPoint[]) => _.maxBy(series, 'y');
  