trmnl-paper-screen

@miantiao-me

Use when the user wants to push, deploy, or update screen content on a TRMNL device via a LaraPaper instance. Builds the JSON payload with device credentials (MAC address + device API key) and sends to `/api/screens`. After an actual send, it can read back `image_url` from the current screen endpoint, review the rendered result, and route layout fixes back to `trmnl-paper-blade`. Also use when they say "send to device," "update the display," "deploy this screen," or need to construct the LaraPaper screen update request for already-prepared markup.