fix: write git tag/commit messages via UTF-8 -F file

release.ps1

@@ -45,9 +45,11 @@ function Convert-GitOutputLines {
   )
 }
 
-# Call git.exe directly. Do not wrap with `cmd /c` — on Chinese Windows, cmd
-# re-encodes -m / -F arguments through the OEM code page and garbles UTF-8
-# annotated tag / commit messages (e.g. 「正式发布」 → 「姝ｅ紡鍙戝竷」).
+# Call git.exe directly. Never wrap with `cmd /c`: on Chinese Windows, cmd
+# re-encodes the command line through the OEM code page.
+# Also never pass Chinese via `git -m`: Windows PowerShell 5.1 encodes native
+# argv using the console code page, so 「正式发布」 becomes 「姝ｅ紡鍙戝竷」
+# in the annotated tag. Commit/tag messages go through a UTF-8 file + `-F`.
 function Invoke-GitRaw {
   param([Parameter(Mandatory = $true)][string[]]$GitArgs)
   $prev = $ErrorActionPreference
@@ -73,6 +75,21 @@ function Invoke-Git {
   }
 }
 
+function Invoke-GitWithMessageFile {
+  param(
+    [Parameter(Mandatory = $true)][string[]]$GitArgsPrefix,
+    [Parameter(Mandatory = $true)][string]$Message
+  )
+  $msgFile = Join-Path ([System.IO.Path]::GetTempPath()) ("jiangchang-git-msg-" + [guid]::NewGuid().ToString("N") + ".txt")
+  $utf8NoBom = New-Object System.Text.UTF8Encoding $false
+  [System.IO.File]::WriteAllText($msgFile, ($Message.TrimEnd() + "`n"), $utf8NoBom)
+  try {
+    Invoke-Git -GitArgs (@("-c", "i18n.commitEncoding=utf-8") + $GitArgsPrefix + @("-F", $msgFile))
+  } finally {
+    Remove-Item -LiteralPath $msgFile -Force -ErrorAction SilentlyContinue
+  }
+}
+
 function Get-GitOutput {
   param([Parameter(Mandatory = $true)][string[]]$GitArgs)
   $r = Invoke-GitRaw -GitArgs $GitArgs
@@ -229,7 +246,7 @@ function Ensure-CleanOrAutoCommit {
   }
 
   Invoke-Git -GitArgs @("add", "-A")
-  Invoke-Git -GitArgs @("commit", "-m", $commitMsg)
+  Invoke-GitWithMessageFile -GitArgsPrefix @("commit") -Message $commitMsg
 }
 
 try {
@@ -289,13 +306,13 @@ try {
   }
 
   if ($DryRun) {
-    Write-Host "[DryRun] Would run: git tag -a $nextTag -m `"$Message`"" -ForegroundColor Yellow
+    Write-Host "[DryRun] Would run: git tag -a $nextTag -F <utf8-msg-file> ($Message)" -ForegroundColor Yellow
     Write-Host "[DryRun] Would run: git push origin $nextTag" -ForegroundColor Yellow
     Write-Host "=== DryRun Complete ===" -ForegroundColor Cyan
     exit 0
   }
 
-  Invoke-Git -GitArgs @("tag", "-a", $nextTag, "-m", $Message)
+  Invoke-GitWithMessageFile -GitArgsPrefix @("tag", "-a", $nextTag) -Message $Message
   Invoke-Git -GitArgs @("push", "origin", $nextTag)
 
   Write-Host "Release success: $nextTag" -ForegroundColor Green