Haerin X4 sync (Windows)
========================

1. On the X4: Settings → File Transfer → Join Network (same Wi‑Fi as this PC)
2. Unzip this folder anywhere
3. Double-click haerin-xteink-sync.exe
4. A console window opens, pulls reading time from the X4, and posts it to:

   https://bistrochats-macbook-air.tail072512.ts.net

(Tailscale Funnel — no ngrok interstitial.)

If crosspoint.local fails, edit haerin-xteink-sync.json:

{
  "haerinUrl": "https://bistrochats-macbook-air.tail072512.ts.net",
  "deviceHost": "http://192.168.x.x"
}

Or run:
  haerin-xteink-sync.exe --host http://192.168.x.x
