feat: 增强三个 CLI 工具配置脚本

- Gemini CLI: 添加 GEMINI_MODEL 环境变量、settings.json 输出及备份逻辑
- Codex: 修复模型名称一致性 (gpt-5-codex)、添加 auth.json 备份逻辑
- Claude Code: 添加 VSCode 插件 config.json 配置支持
- CLAUDE.md: 重构文档，添加三个工具配置差异表

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

setup-claude-code.ps1

@@ -83,6 +83,13 @@ function Backup-Settings {
         Copy-Item -Path $ClaudeSettingsFile -Destination $backupFile
         Write-Info "Backed up existing settings to: $backupFile"
     }
+    $configJsonPath = "$ClaudeConfigDir\config.json"
+    if (Test-Path $configJsonPath) {
+        $timestamp = Get-Date -Format "yyyyMMdd_HHmmss"
+        $backupFile = "$configJsonPath.backup.$timestamp"
+        Copy-Item -Path $configJsonPath -Destination $backupFile
+        Write-Info "Backed up existing config to: $backupFile"
+    }
 }
 
 # Function to create settings directory
@@ -173,6 +180,12 @@ function New-Settings {
         $json = $settings | ConvertTo-Json -Depth 10
         Set-Content -Path $ClaudeSettingsFile -Value $json -Encoding UTF8
         Write-Success "Claude Code settings written to: $ClaudeSettingsFile"
+
+        # Write config.json for VSCode Claude extension
+        $configJsonPath = "$ClaudeConfigDir\config.json"
+        $configJson = @{ primaryApiKey = "xcodecli" }
+        $configJson | ConvertTo-Json | Set-Content -Path $configJsonPath -Encoding UTF8
+        Write-Success "VSCode Claude config written to: $configJsonPath"
         return $true
     }
     catch {
@@ -192,30 +205,6 @@ function Show-Settings {
     } else {
         Write-Info "No existing Claude Code settings found."
     }
-    
-    Write-Host ""
-    Write-Info "Current environment variables:"
-    Write-Host "----------------------------------------"
-    $baseUrl = [Environment]::GetEnvironmentVariable("ANTHROPIC_BASE_URL", [EnvironmentVariableTarget]::User)
-    $authToken = [Environment]::GetEnvironmentVariable("ANTHROPIC_AUTH_TOKEN", [EnvironmentVariableTarget]::User)
-    
-    if ($baseUrl) {
-        Write-Info "ANTHROPIC_BASE_URL: $baseUrl"
-    } else {
-        Write-Info "ANTHROPIC_BASE_URL: (not set)"
-    }
-    
-    if ($authToken) {
-        $maskedToken = if ($authToken.Length -gt 12) { 
-            "$($authToken.Substring(0, 8))...$($authToken.Substring($authToken.Length - 4))" 
-        } else { 
-            "$($authToken.Substring(0, [Math]::Min(4, $authToken.Length)))..." 
-        }
-        Write-Info "ANTHROPIC_AUTH_TOKEN: $maskedToken"
-    } else {
-        Write-Info "ANTHROPIC_AUTH_TOKEN: (not set)"
-    }
-    Write-Host "----------------------------------------"
 }
 
 # Main function
@@ -305,28 +294,6 @@ function Main {
     
     # Create new settings
     if (New-Settings -BaseUrl $BaseUrl -ApiKey $ApiKey) {
-        Write-Host ""
-        
-        # Also set environment variables for Windows
-        Write-Info "Setting environment variables..."
-        try {
-            # Set user environment variables (persistent across sessions)
-            [Environment]::SetEnvironmentVariable("ANTHROPIC_BASE_URL", $BaseUrl, [EnvironmentVariableTarget]::User)
-            [Environment]::SetEnvironmentVariable("ANTHROPIC_AUTH_TOKEN", $ApiKey, [EnvironmentVariableTarget]::User)
-            
-            # Also set for current session
-            $env:ANTHROPIC_BASE_URL = $BaseUrl
-            $env:ANTHROPIC_AUTH_TOKEN = $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 "  ANTHROPIC_BASE_URL=$BaseUrl"
-            Write-Info "  ANTHROPIC_AUTH_TOKEN=$ApiKey"
-        }
-        
         Write-Host ""
         Write-Success "Claude Code has been configured successfully!"
         Write-Info "You can now use Claude Code with your API router."
@@ -335,7 +302,6 @@ function Main {
         Write-Info "  claude --version"
         Write-Info ""
         Write-Info "Configuration file location: $ClaudeSettingsFile"
-        Write-Info "Environment variables have been set for ANTHROPIC_BASE_URL and ANTHROPIC_AUTH_TOKEN"
         
         if (Test-Path $ClaudeSettingsFile) {
             Write-Host ""