feat: support Tencent TokenHub API key via OpenAI-compatible protocol

[feitianbubu]

📝 变更描述 / Description

腾讯云新的 TokenHub 平台发的是单段 sk 密钥,走 OpenAI 兼容协议,和旧混元三段式 AppId|SecretId|SecretKey(TC3 签名)不是一套东西。旧混元平台2026-06-22已开始下线, 2026-09-30 停服,新购只能用 TokenHub 的 api key。

改法: 因为新版兼容oai格式, 因此改法比较简单, key 含 | 走原来 TC3逻辑,api key 走 OpenAI 兼容的实现即可, 代码改动较小

迁服新闻: https://cloud.tencent.com/announce/detail/2310
新版平台: https://console.cloud.tencent.com/tokenhub/models

🚀 变更类型 / Type of change

• 🐛 Bug 修复 (Bug fix)
• ✨ 新功能 (New feature)
• ⚡ 性能优化 / 重构 (Refactor)
• 📝 文档更新 (Documentation)

🔗 关联任务 / Related Issue

• 无

✅ 提交前检查项 / Checklist

• 人工确认: 我已亲自整理并撰写此描述,没有直接粘贴未经处理的 AI 输出。
• 非重复提交: 我已搜索现有的 Issues 与 PRs,确认不是重复提交。
• Bug fix 说明: 若此 PR 标记为 Bug fix,我已提交或关联对应 Issue,且不会将设计取舍、预期不一致或理解偏差直接归类为 bug。
• 变更理解: 我已理解这些更改的工作原理及可能影响。
• 范围聚焦: 本 PR 未包含任何与当前任务无关的代码改动。
• 本地验证: 已在本地运行并通过测试或手动验证,维护者可以据此复核结果。
• 安全合规: 代码中无敏感凭据,且符合项目代码规范。

📸 运行证明 / Proof of Work

新建渠道,优化提示:

新版渠道,自测通过:

由于旧版渠道已无法新建,因此无法自测, 通过断点验证了旧的的url 和 tc3段key和签名正常

[coderabbitai]

Walkthrough

Tencent channels now select native or OpenAI-compatible adaptors from the API key format, default compatible requests to the TokenHub endpoint, support streaming, and display updated key-format guidance.

Changes

Tencent adaptor dispatch

Layer / File(s)	Summary
Tencent adaptor selection and wiring relay/channel/tencent/dispatch.go, relay/relay_adaptor.go	Tencent initialization selects the native adaptor for legacy pipe-delimited keys and the OpenAI-compatible adaptor otherwise, with exported model/channel selectors and updated adaptor wiring.
Channel capability and key guidance relay/common/relay_info.go, web/default/src/features/channels/constants.ts	Tencent is marked as stream-capable, and the channel prompt accepts TokenHub API keys or the legacy format.

Estimated code review effort: 2 (Simple) | ~10 minutes

Suggested reviewers: calcium-ion

Poem

A rabbit hops where Tencent flows,
With keys in forms the channel knows.
Native paths and OpenAI,
Streamy requests now reach the sky.
TokenHub guidance helps them go.

🚥 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	The title clearly summarizes the main change: Tencent TokenHub API key support via the OpenAI-compatible protocol.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}