JUC500 offline update
XFER_BUILD=2026-07-21-juc500-auto-refresh
created=20260721-134751
SmartKMLink VID:PID=removed — JUC500 only (0711:7500 IF5)

Windows closed-network apply:
  1) Copy this folder (or unzip) to the peer PC via USB stick
  2) Close JUC500 GUI on Windows
  3) Double-click apply_offline_update.bat
     (default DEST=C:\dev\juc500 — or: apply_offline_update.bat D:\path\juc500)
  4) cd C:\dev\juc500 && start.bat
  5) GUI version line must show: 2026-07-21-juc500-auto-refresh
  6) JUC500 IF5: vendor\tools\zadig.exe → 0711:7500 → MI_05 → WinUSB

Full fresh install (includes embeddable Python):
  ./scripts/make_windows_bundle.sh