feat: 重构 setup.ps1 为一站式安装配置脚本

- 新增包管理器检测（Node.js/npm 和 Bun）
- 新增 Bun 安装引导功能
- 新增工具安装功能（通过 npm/bun 安装 CLI 工具）
- 支持从远程下载并执行配置脚本
- 移除 Claude Code 配置中的默认 model 设置

codex/setup-codex.ps1

@@ -163,15 +163,15 @@ function New-Settings {
     )
 
     $config = @"
-model_provider = "apirouter"
-model = "gpt-5-codex"
+model_provider = "xcodecli"
+model = "gpt-5.1-codex"
 model_reasoning_effort = "high"
 
-[model_providers.apirouter]
-name = "apirouter"
+[model_providers.xcodecli]
+name = "xcodecli"
 base_url = "$BaseUrl/v1"
 wire_api = "responses"
-env_key = "APIROUTER_API_KEY"
+env_key = "XCODECLI_API_KEY"
 "@
 
     try {
@@ -199,7 +199,7 @@ function Show-Settings {
     Write-Host ""
     Write-Info "Current environment variables:"
     Write-Host "----------------------------------------"
-    $apirouterKey = [Environment]::GetEnvironmentVariable("APIROUTER_API_KEY", [EnvironmentVariableTarget]::User)
+    $apirouterKey = [Environment]::GetEnvironmentVariable("XCODECLI_API_KEY", [EnvironmentVariableTarget]::User)
     
     if ($apirouterKey) {
         $maskedKey = if ($apirouterKey.Length -gt 12) { 
@@ -207,9 +207,9 @@ function Show-Settings {
         } else { 
             "$($apirouterKey.Substring(0, [Math]::Min(4, $apirouterKey.Length)))..." 
         }
-        Write-Info "APIROUTER_API_KEY: $maskedKey"
+        Write-Info "XCODECLI_API_KEY: $maskedKey"
     } else {
-        Write-Info "APIROUTER_API_KEY: (not set)"
+        Write-Info "XCODECLI_API_KEY: (not set)"
     }
     Write-Host "----------------------------------------"
 }
@@ -307,17 +307,17 @@ function Main {
         Write-Info "Setting environment variables..."
         try {
             # Set user environment variables (persistent across sessions)
-            [Environment]::SetEnvironmentVariable("APIROUTER_API_KEY", $ApiKey, [EnvironmentVariableTarget]::User)
+            [Environment]::SetEnvironmentVariable("XCODECLI_API_KEY", $ApiKey, [EnvironmentVariableTarget]::User)
 
             # Also set for current session
-            $env:APIROUTER_API_KEY = $ApiKey
+            $env:XCODECLI_API_KEY = $ApiKey
 
             Write-Success "Environment variables set successfully"
         }
         catch {
             Write-Warning "Failed to set environment variables: $($_.Exception.Message)"
             Write-Info "You may need to set them manually:"
-            Write-Info "  APIROUTER_API_KEY=$ApiKey"
+            Write-Info "  XCODECLI_API_KEY=$ApiKey"
         }
 
         Write-Host ""
@@ -325,7 +325,7 @@ function Main {
         Write-Info "You can now use Codex with your XCodeCLI API router."
         Write-Info ""
         Write-Info "Configuration file location: $CodexConfigFile"
-        Write-Info "Environment variable APIROUTER_API_KEY has been set"
+        Write-Info "Environment variable XCODECLI_API_KEY has been set"
 
         if (Test-Path $CodexConfigFile) {
             Write-Host ""