Keep screenshots/automation working while the MacBook lid is closed

Main problem I wanted to solve: When a MacBook is in Clamshell / headless mode, desktop-dependent actions (especially screenshot pipelines) can become unreliable or fail. I didn't want to buy a Mac mini just for this. I just want to reuse an existing MacBook for 24/7 OpenClaw runs, so that I can keep the lid closed and store the laptop vertically (less desk usage) and also maintain screenshot-dependent workflows with better stability. Code is on GitHub https://github.com/xtongs/mirrorscreen if anyone needs it.