$ts='C:\Program Files\Tailscale\tailscale.exe'; $st='C:\ProgramData\Tailscale\server-state.conf'
Stop-Service Tailscale -Force
if(Test-Path $st){ $bak="$st.bak-$(Get-Date -Format yyyyMMdd-HHmmss)"; Rename-Item $st $bak; "state backed up to $bak" } else { "no server-state.conf found" }
Start-Service Tailscale; Start-Sleep 5
"== Open the login URL below on your phone and approve (podoai.kr account) =="
& $ts up --unattended --advertise-tags=tag:kiosk-event --reset
& $ts status