Function normalizeResolutionFlag

packages/parsers/src/types.ts:59–66

(input: string | undefined)

 * can produce their own "invalid" UX (CLI exit, route validation, etc.).
 */
export function normalizeResolutionFlag(input: string | undefined): CanvasResolution | undefined {
  if (!input) return undefined;
  const lowered = input.toLowerCase();
  if ((VALID_CANVAS_RESOLUTIONS as readonly string[]).includes(lowered)) {
    return lowered as CanvasResolution;
  }
  return RESOLUTION_ALIASES[lowered];
}

export interface TimelineElementBase {
  id: string;