💄 style: Optimize smooth output

[sxjeru]

💻 变更类型 | Change Type

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

🔀 变更说明 | Description of Change

• 后台持续平滑输出（或者说跳过后台未输出的部分）
• 为英文数字字符加速输出（待讨论）
• [Request] 深度思考内容不需平滑输出 #5781

第二个请求是因为中日韩等字符的信息量显著高于英文字母，加速输出可以减少代码等输出的等待时间。
（可能会影响英文用户正常聊天？）

📝 补充信息 | Additional Information

• fix [Bug] 置于后台时输出极为缓慢 #5820
• fix [Bug] 切换到其他页面后，输出不再生成，切换回来输出继续 #2046
• fix [Request] Backend Data Reception #3057
• fix [Bug] 切换浏览器tab后不会继续输出 #2615

[vercel]

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

A member of the Team first needs to authorize it.

[lobehubbot]

👍 @sxjeru

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。

[gru-agent]

TestGru Assignment

Summary

Link	CommitId	Status	Reason
Detail	db7a469	✅ Finished

Files

File	Pull Request
src/utils/fetch/fetchSSE.ts	🟢 Open #5826

Tip

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.15%. Comparing base (f7fa432) to head (d66c612).
Report is 31 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff            @@
##             main    #5824    +/-   ##
========================================
  Coverage   92.15%   92.15%            
========================================
  Files         648      649     +1     
  Lines       58987    59017    +30     
  Branches     2922     2726   -196     
========================================
+ Hits        54357    54387    +30     
  Misses       4630     4630            

Flag	Coverage Δ
app	92.15% <100.00%> (+<0.01%)	⬆️
server	98.01% <ø> (ø)

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.

[fzlzjerry]

要是影响到英文用户聊天就不太好了吧🤔

[lobehubbot]

Bot detected the issue body's language is not English, translate it automatically. 👯👭🏻🧑‍🤝‍🧑👫🧑🏿‍🤝‍🧑🏻👩🏾‍🤝‍👨🏿👬🏿

---

It would be bad if it affects English user chats 🤔

[fzlzjerry]

看起来没有问题