chore(release): update v0.5.2 notes with late fixes

release-notes/v0.5.2.md

@@ -25,6 +25,11 @@ This is an experience and stability release on top of `v0.5.1`, adding model sel
 - Fixed built-in updates tripping the installer legacy-data guard (#1160).
 - Compacted the session sidebar and improved the workbench divider; fixed model selector header scroll bleed-through, activity panel state across tab switches, and SubAgent tool card expand state across live refresh.
 - Workspace Markdown preview now renders images.
+- Stabilized the context usage indicator across model and runtime switches.
+- Tool-generated media (e.g. images rendered via Bash) no longer disappears when the turn has no tracked file changes.
+- The working directory is preserved across runtime restarts.
+- The project menu is no longer covered by the browser preview.
+- SubAgent tasks are kept out of the main session's activity panel.
 
 ## Installation
 
@@ -65,6 +70,11 @@ Download the installer for your platform and architecture from the Assets sectio
 - 修复内置更新误触安装器旧数据保护（#1160）。
 - 压缩会话侧栏并优化 workbench 分割条；修复模型选择器表头滚动穿透、活动面板跨标签页保持、SubAgent 工具卡展开状态保持等桌面端交互问题。
 - workspace 的 Markdown 预览现在能显示图片。
+- 切换模型或运行时后，上下文用量显示保持稳定。
+- 工具生成的媒体（如 Bash 渲染的图片）在回合没有跟踪文件变更时不再消失。
+- 运行时重启后保留工作目录。
+- 项目菜单不再被浏览器预览遮挡。
+- SubAgent 任务不再混入主会话的活动面板。
 
 ## 安装