message: Reduce math and rendering errors in row calc.
diff: @@ -456,16 +456,17 @@ export class TerminalBlock implements Block {
  }
  #renderLines(painter: QPainter, lines: Line[], startY: number, renderCursor: boolean): void {
  - let y = startY;
  const metrics = this.#fontMetrics;
  const heightPx = metrics.heightPx;
  + let yCounter = 0;
  for (const line of lines) {
  + const y = startY + yCounter * heightPx;
  this.#renderSingleLine(painter, line, y, renderCursor);
  for (const layer of line.layers) {
  this.#renderSingleLine(painter, layer.line, y, renderCursor);
  }
  - y += heightPx;
  + yCounter++;
  }
  }
  