v0.2.2 — 树形箭头垂直对齐

修复树形列表展开/折叠箭头偏下的问题：使用固定尺寸 SVG 和居中布局，让账号、桶、目录的箭头与同行内容对齐。

Fix vertical alignment of tree disclosure arrows by replacing font glyphs with centered SVG chevrons.

Validation: TypeScript/build, 19 frontend tests, 41 backend tests, Ruff, and isolated package startup. Synthetic browser screenshot reviewed for expanded/collapsed states; native Codex rendering has not been independently observed.

下载 ZIP 和 SHA256SUMS 后校验安装，或安装 marketplace 标签 v0.2.2。安装后请在新聊天中打开插件。

GitHub Actions: https://github.com/boreas320/codex-cloud-storage/actions/runs/39778357338 — passed on commit 6212b0c.