release: v0.8.9 发布准备

[modusensus]

release-prep 产物 + 发版节内容与 CHANGELOG 结构修复（workflow 尾步 gh pr create 被仓库设置拒，人工补开，先例 #325）。发版后 squash 合并、tag 打在显式 SHA。

Summary by CodeRabbit

• 文档
  • 更新中英文路线图，将 v0.8 标记为已发布至 v0.8.9。
  • 新增 v0.8.9 发布记录，涵盖 V4 会话消息写入兼容修复，以及状态页、设置页和星形控件改版。

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📥 Commits

Reviewing files that changed from the base of the PR and between 6b8f609 and c53e583.

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📒 Files selected for processing (3)

• README.md
• dsh-mneme/CHANGELOG.md
• dsh-mneme/package.json

 _____________________________________________________________
< Jurassic Park would have been a lot shorter with me around. >
 -------------------------------------------------------------
  \
   \   (\__/)
       (•ㅅ•)
       / 　 づ

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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