Function addToUndoStack

app/src/lib/undoStack.ts:9–12

(action: UndoAction)

let redoStack: UndoAction[] = [];

export function addToUndoStack(action: UndoAction) {
  undoStack.push(action);
  redoStack = []; // Clear redo stack when a new action is performed
}

export function undo() {
  const action = undoStack.pop();