Method invalidatePrevFrame

src/ink/ink.tsx:850–852

* Mark the previous frame as untrustworthy for blit, forcing the next * render to do a full-damage diff instead of the per-node fast path. * * Lighter than forceRedraw() — no screen clear, no extra write. Call * from a useLayoutEffect cleanup when unmounting a tall overlay: the * blit

()

   * onRender resets the flag at frame end so it's one-shot.
   */
  invalidatePrevFrame(): void {
    this.prevFrameContaminated = true;
  }

  /**
   * Called by the <AlternateScreen> component on mount/unmount.