fix(codex): write config to ~/.codex/ not %APPDATA%\codex\

Codex CLI reads config from %USERPROFILE%\.codex\config.toml
but PowerShell fallback was writing to %APPDATA%\codex\config.toml.
Old broken config remained in ~/.codex/ causing TOML parse errors.

- Fix config path: $env:APPDATA\codex → $env:USERPROFILE\.codex
- Add cleanup step to remove broken config before patching
- Remove old config before writing new one

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

codex/ucodex_update.ps1

@@ -132,9 +132,12 @@ if ($pyCmd) {
 
 if (-not $pyCmd) {
     Write-Host "  Applying patches (PowerShell)..." -ForegroundColor Cyan
-    $configDir = "$env:APPDATA\codex"
+    # Codex reads config from ~/.codex/ (NOT %APPDATA%\codex\)
+    $configDir = "$env:USERPROFILE\.codex"
     New-Item -ItemType Directory -Force -Path $configDir | Out-Null
     $configToml = Join-Path $configDir "config.toml"
+    # Remove old broken config
+    if (Test-Path $configToml) { Remove-Item $configToml -Force -ErrorAction SilentlyContinue }
     $tomlContent = @"
 model = "gpt-5.4"
 model_reasoning_effort = "high"