fix(ui): restore standard Codex API key setup

Remove command-backed provider auth from the generated configuration and use auth.json again.

Co-authored-by: Codex <noreply@openai.com>

frontend/src/views/api-keys/components/ApiKeyUseModal.vue

@@ -35,23 +35,13 @@ const configPath = computed(() =>
     ? '%userprofile%\\.codex\\config.toml'
     : '~/.codex/config.toml',
 )
-const tokenPath = computed(() =>
-  activePlatform.value === 'windows'
-    ? '%userprofile%\\.codex\\codex-proxy.token'
-    : '~/.codex/codex-proxy.token',
+const authPath = computed(() =>
+  activePlatform.value === 'windows' ? '%userprofile%\\.codex\\auth.json' : '~/.codex/auth.json',
 )
+const codexAuthJson = computed(() => JSON.stringify({ OPENAI_API_KEY: keyValue.value }, null, 2))
 const defaultModel = computed(() =>
   props.apiKey?.providerKind?.trim().toLowerCase() === 'xai' ? 'grok-4.5' : 'gpt-5.5',
 )
-const providerAuthToml = computed(() =>
-  activePlatform.value === 'windows'
-    ? `[model_providers.OpenAI.auth]
-command = "powershell.exe"
-args = ["-NoLogo", "-NoProfile", "-NonInteractive", "-Command", "Get-Content -Raw (Join-Path (Join-Path $env:USERPROFILE '.codex') 'codex-proxy.token')"]`
-    : `[model_providers.OpenAI.auth]
-command = "sh"
-args = ["-c", 'cat "$HOME/.codex/codex-proxy.token"']`,
-)
 
 const codexConfigToml = computed(
   () => `model_provider = "OpenAI"
@@ -67,8 +57,7 @@ windows_wsl_setup_acknowledged = true
 name = "OpenAI"
 base_url = "${props.apiBaseUrl}"
 wire_api = "responses"
-
-${providerAuthToml.value}
+requires_openai_auth = true
 
 [features]
 goals = true`,
@@ -76,7 +65,7 @@ goals = true`,
 
 const visibleFiles = computed(() => [
   { path: configPath.value, content: codexConfigToml.value },
-  { path: tokenPath.value, content: keyValue.value },
+  { path: authPath.value, content: codexAuthJson.value },
 ])
 </script>