fix: isUsing3PServices 检查所有非 Anthropic provider

[Evsdrg]

Summary

原 isUsing3PServices() 仅检查 Bedrock / Vertex / Foundry，遗漏了
OpenAI、Gemini、Grok 三个通过 CLAUDE_CODE_USE_* 环境变量切换的
第三方 provider。

这导致两个问题：

1. 命令可用性判定中 OpenAI/Gemini/Grok 用户被错误识别为 console 用户
   （/fast、/install-github-app 两个 Anthropic 专有命令误显示）
2. auth status 显示中这些用户被误报为"未登录"

Changes

在函数中添加三个缺失的环境变量检查，并更新注释说明与 providers.ts
的同步要求。

Test plan

• tsc --noEmit 零错误
• biome format 零差异
• biome lint 零违规

🤖 Generated with Claude Code Best

Summary by CodeRabbit

• New Features
  • Added support for detecting additional third-party AI provider environments (OpenAI, Gemini, Grok).

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: ad4e4212-7339-4a27-9a1a-eaafc1db9428

📥 Commits

Reviewing files that changed from the base of the PR and between 5b941d4 and 8daca0f.

📒 Files selected for processing (1)

• src/utils/auth.ts

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📝 Walkthrough

Walkthrough

The isUsing3PServices() function in src/utils/auth.ts now detects three additional third-party provider environments—OpenAI, Gemini, and Grok—alongside existing Bedrock, Vertex, and Foundry detection. The function's documentation was expanded to clarify its broader gating purpose and explicitly require keeping the implementation synchronized with getAPIProvider() environment variable handling.

Changes

Third-party provider detection expansion

Layer / File(s)	Summary
Extended third-party service detection src/utils/auth.ts	isUsing3PServices() now checks CLAUDE_CODE_USE_OPENAI, CLAUDE_CODE_USE_GEMINI, and CLAUDE_CODE_USE_GROK environment variables to gate third-party provider usage, with documentation expanded to describe the gating purpose and sync requirement with getAPIProvider().

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Possibly related PRs

• claude-code-best/claude-code#420: Broadens third-party provider detection in src/utils/auth.ts to include OpenAI/Gemini/Grok flags, which directly affects how requests are classified as "third-party" and payload shapes in the API service layer.
• claude-code-best/claude-code#189: Expands third-party provider environment detection that feeds into API provider selection logic used by status panel configuration fields for Grok and OpenAI.
• claude-code-best/claude-code#102: Also modifies src/utils/auth.ts to adjust provider environment gating for OpenAI-related modes and authentication enabling/disabling logic.

Poem

🐰 With OpenAI, Gemini, and Grok now in sight,
The provider detection spreads its wings wide and bright,
Third-party services recognized with care,
Each flag now dances in the env-var air,
Synced with getAPIProvider, keeping all fair!

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: expanding isUsing3PServices to check all non-Anthropic providers, matching the core objective of fixing the function to detect OpenAI, Gemini, and Grok providers.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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