fix: 修复 PowerShell 脚本中文乱码问题

- 在所有 .ps1 脚本中添加 UTF-8 编码兼容块
  (Console OutputEncoding/InputEncoding + chcp 65001)
- 兼容 Windows PowerShell 5.x, PS 7.x, Windows Terminal, conhost, ISE
- 添加 UTF-8 BOM 确保本地执行时编码正确识别
- try/catch 静默处理不支持 Console 类的环境

codex/setup-codex.ps1

@@ -1,4 +1,4 @@
-# Codex Configuration Script for XCodeCLI (Windows)
+# Codex Configuration Script for XCodeCLI (Windows)
 # This script configures Codex to use your XCodeCLI instance
 # Automatically tests multiple API endpoints and selects the working one
 # Run with: powershell -ExecutionPolicy Bypass -File setup-codex.ps1 -ApiKey YOUR_KEY
@@ -13,6 +13,20 @@ param(
 # Check for pre-set variables from one-liner command
 if (-not $ApiKey -and (Test-Path Variable:key)) { $ApiKey = $key }
 
+# ========== UTF-8 编码兼容 ==========
+# 确保中文字符在各种 PowerShell 环境中正确显示
+# 兼容: Windows PowerShell 5.x, PowerShell 7.x, Windows Terminal, conhost, ISE, iwr|iex
+try {
+    if ($Host.Name -eq 'ConsoleHost') {
+        [Console]::OutputEncoding = [System.Text.Encoding]::UTF8
+        [Console]::InputEncoding = [System.Text.Encoding]::UTF8
+    }
+    $OutputEncoding = [System.Text.Encoding]::UTF8
+    if ($env:OS -eq 'Windows_NT') {
+        & cmd /c "chcp 65001 >nul" 2>&1 | Out-Null
+    }
+} catch { }
+
 # Configuration
 $DefaultBaseUrl = "https://api2.xcodecli.com"
 $CodexConfigDir = "$env:USERPROFILE\.codex"