fix(providers): accept Grok auth record imports

[awsl233777]

Summary

• allow Grok import to accept direct CPA xAI credential JSON, CLIProxyAPI auth records with credentials under metadata, and Maxx exported Grok provider payloads under config.grok
• preserve validation for xAI/oauth credentials and required access/refresh tokens
• keep the client-route available-provider bulk action bar sticky inside the available providers section so long provider lists do not hide the add/clear actions while scrolling
• expose the existing 429 rate-limit fallback cooldown setting in Settings, with 1-86400 second validation and Retry-After precedence copy
• add regression coverage for all three supported Grok import shapes
• update provider type order test expectation to include Grok

Verification

• cd web && pnpm test -- grok-token-import.test.ts (17 files / 81 tests passed)
• cd web && pnpm typecheck
• git diff --check
• cd web && pnpm exec prettier --check src/pages/settings/index.tsx src/locales/zh.json src/locales/en.json
• cd web && pnpm exec prettier --check src/components/routes/ClientTypeRoutesContent.tsx src/pages/providers/components/grok-token-import.tsx src/pages/providers/components/grok-token-import.test.ts src/pages/providers/types.test.ts
• go test ./internal/executor ./internal/service

Notes

• cd web && pnpm format:check still reports pre-existing formatting drift across unrelated files; only the touched files were formatted for this PR.

Summary by CodeRabbit

• 新功能

  • Grok 凭据导入现支持多种来源格式，并自动统一配置字段。
  • 支持保留凭据的禁用状态等配置属性。
  • 提供方分组页面的批量操作栏现会固定在顶部，滚动时更易访问。

• 测试

  • 新增 Grok 凭据格式转换及提供方类型排序的覆盖测试。

[coderabbitai]

📝 Walkthrough

Walkthrough

扩展 Grok 凭据导入以兼容 xAI CPA、CLIProxyAPI 和 Maxx 导出格式，并新增归一化测试；同时将 Provider 批量操作栏改为顶部 sticky 布局，更新 grok 类型覆盖测试。

Changes

Provider 导入与界面更新

Layer / File(s)	Summary
Grok 凭据格式归一化 web/src/pages/providers/components/grok-token-import.tsx, web/src/pages/providers/components/grok-token-import.test.ts	支持多种 Grok 导入载荷，统一 snake_case/camelCase 字段、元数据和禁用状态，并覆盖三类输入测试。
Provider 类型与批量操作栏 web/src/components/routes/ClientTypeRoutesContent.tsx, web/src/pages/providers/types.test.ts, web/src/pages/providers/components/grok-token-import.tsx	将 grok 加入 Provider 类型断言，并将批量操作区域调整为带背景模糊效果的顶部 sticky 容器。

Estimated code review effort: 3 (Moderate) | ~25 minutes

Possibly related PRs

• awsl-project/maxx#633：涉及同一批量 Provider 选择与添加控件。
• awsl-project/maxx#676：新增 Grok CPA/CLIProxyAPI 适配器，消费本次归一化的配置字段。
• awsl-project/maxx#678：涉及 Grok OAuth 导入结构与配置模型。

Poem

小兔拎来 Grok 票，
CPA、Maxx 都能找。
归一字段排成行，
Sticky 控件稳稳跳。
测试胡萝卜咔嚓响！

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	标题准确概括了此次为 Grok 导入支持 auth record 的主要变更。

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/grok-provider-import-empty-cpa

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