PowerShell 5.1 reads .ps1 files as locale codepage (not UTF-8 no BOM), which corrupts multi-byte Vietnamese chars and breaks parsing. Rewrote setup-iis-sites.ps1, setup-ssl.ps1, setup-gitea-runner.ps1, deploy-all.ps1 as ASCII-only. Also renamed $Host param to $HostName in Ensure-Site to avoid collision with PowerShell built-in $Host automatic variable. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>