🐛 fix: fix enable_search parameter intro condition in Qwen

[hezhijie0327]

💻 变更类型 | Change Type

• ✨ feat
• 🐛 fix
• ♻️ refactor
• 💄 style
• 👷 build
• ⚡️ perf
• 📝 docs
• 🔨 chore

🔀 变更说明 | Description of Change

1. enable_search 仅对商业模型 qwen-max, qwen-plus, qwen-turbo 系列生效
2. 引入两个环境变量

变量名	描述	默认值	可选值
QWEN_ENABLE_SEARCH	模型在生成文本时是否使用互联网搜索结果进行参考	0	1
QWEN_SEARCH_STRATEGY	搜索互联网信息的数量	standard	pro

close #5296

📝 补充信息 | Additional Information

ref: https://help.aliyun.com/zh/model-studio/developer-reference/use-qwen-by-calling-api

[vercel]

@hezhijie0327 is attempting to deploy a commit to the LobeHub Team on Vercel.

A member of the Team first needs to authorize it.

[gru-agent]

TestGru Assignment

Summary

Link	CommitId	Status	Reason
Detail	defa656	🚫 Skipped	No files need to be tested {"src/libs/agent-runtime/qwen/index.ts":"no test value"}

Tip

You can @gru-agent and leave your feedback. TestGru will make adjustments based on your input

[lobehubbot]

👍 @hezhijie0327

Thank you for raising your pull request and contributing to our Community
Please make sure you have followed our contributing guidelines. We will review it as soon as possible.
If you encounter any problems, please feel free to connect with us.
非常感谢您提出拉取请求并为我们的社区做出贡献，请确保您已经遵循了我们的贡献指南，我们会尽快审查它。
如果您遇到任何问题，请随时与我们联系。

[codecov]

Codecov Report

Attention: Patch coverage is 68.75000% with 5 lines in your changes missing coverage. Please review.

Project coverage is 91.72%. Comparing base (bde6d64) to head (9f16d4b).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/libs/agent-runtime/qwen/index.ts	68.75%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5297      +/-   ##
==========================================
- Coverage   91.73%   91.72%   -0.01%     
==========================================
  Files         591      591              
  Lines       46027    46042      +15     
  Branches     2833     2713     -120     
==========================================
+ Hits        42221    42231      +10     
- Misses       3806     3811       +5     

Flag	Coverage Δ
app	91.72% <68.75%> (-0.01%)	⬇️
server	?

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[PatriciaLee3]

Thank you very much for your PR.
Perhaps we should provide an option for people to choose whether to enable this feature, rather than having it on in all cases. IMO, it is unclear how enable_search affects the model's input, and it may lead to difficulties in calculating the number of tokens and unexpected usage costs.

[hezhijie0327]

@PatriciaLee3 added QWEN_ENABLE_SEARCH & QWEN_SEARCH_STRATEGY, should suit your requirement