feat: support getHistoryMessages API

[Ricbet]

Types

• 🎉 New Features

Background or solution

• chat api service 新增 getHistoryMessages api。能获取到当前 chat 面板的历史消息
• 重构部分代码

Changelog

[railway-app]

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 34 lines in your changes are missing coverage. Please review.

Project coverage is 56.08%. Comparing base (f524e60) to head (9fd42ea).

Files	Patch %	Lines
...ai-native/src/browser/model/msg-history-manager.ts	0.00%	26 Missing and 1 partial ⚠️
...ges/ai-native/src/browser/chat/chat.api.service.ts	0.00%	4 Missing ⚠️
packages/ai-native/src/browser/components/utils.ts	0.00%	2 Missing ⚠️
...i-native/src/browser/chat/chat.internal.service.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3559      +/-   ##
==========================================
- Coverage   56.10%   56.08%   -0.03%     
==========================================
  Files        1487     1488       +1     
  Lines       90966    90994      +28     
  Branches    18661    18663       +2     
==========================================
- Hits        51041    51038       -3     
- Misses      33112    33141      +29     
- Partials     6813     6815       +2     

Flag	Coverage Δ
jsdom	51.46% <0.00%> (-0.02%)	⬇️
node	15.65% <0.00%> (-0.01%)	⬇️

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