chore: apply phase 0 review fixes

init.ps1

@@ -33,6 +33,22 @@ Assert-Configured -Name "StartCmd" -Value $StartCmd
 
 Write-Host "==> 当前目录: $($PWD.Path)"
 
+Write-Host "==> 校验 Python 版本"
+$PythonVersion = py -3.12 -c "import sys; print(f'{sys.version_info.major}.{sys.version_info.minor}.{sys.version_info.micro}')"
+if ($LASTEXITCODE -ne 0) {
+  Write-Error "无法运行 py -3.12。请安装 Python 3.12/3.13，并确保 py launcher 可用。"
+  exit 3
+}
+
+$VersionParts = $PythonVersion.Trim().Split(".")
+$MajorVersion = [int]$VersionParts[0]
+$MinorVersion = [int]$VersionParts[1]
+if ($MajorVersion -ne 3 -or $MinorVersion -lt 12 -or $MinorVersion -ge 14) {
+  Write-Error "Python 版本必须满足 >=3.12,<3.14，当前为 $PythonVersion。"
+  exit 3
+}
+Write-Host "    Python $PythonVersion"
+
 if (-not (Test-Path "manage.py")) {
   Write-Error "未找到 manage.py。Django 骨架尚未初始化（见 docs/06-tasks.md 的 T-001）。完成 T-001 后本脚本即可正常运行。"
   exit 1