Release version 0.28.2

Diffs can be read side by side.
Mermaid diagrams get a viewer of their own.

New

Diffs open side by side, with a toggle on every preview and each side scrolling on its own. (#537, #570, @asteroida123)
Mermaid diagrams get their own viewer — sharp at any zoom, draggable, fullscreen, and saveable as SVG, PNG or .mmd.
Select a passage in a message and ask about it in a new conversation, pinned to the agent that wrote it.
The repository panel shows an item's comments, not just its description.
Remote workspace connections can carry custom HTTP headers, for a codeg-server behind a proxy that demands one. (#577, @codebutler)
The window zooms to 300%, and Ctrl/Cmd + and − step it. (#484, #569, @Adam-Dalloul)
Custom Codex models work on OpenAI-compatible gateways, through a template that sends plain Responses requests.
Codex can ask you questions in Default mode, via a new switch in its settings panel.
A delivered task can remove its worktree on the spot, with the same checkbox merge and complete already offer.

Updated bundled agents: OpenCode 1.18.23, Cline 3.0.60, CodeBuddy 2.139.0, DeepSeek Harness 0.7.0, Qoder 1.1.31.
DeepSeek Harness resumes by resolved path, so /var against /private/var or a Windows short name no longer fails.
The Recent list folds back to its first page instead of staying long for the rest of the session.
An issue task has to confirm the problem before fixing it, and the separate "investigate only" mode retires.
Copy image works on pictures staged in the composer. (#556, @Adam-Dalloul)

A task counts its own work, not the pull request it started from or the new files it never committed.
A task waiting on your answer stops reading as "running". (#567, @lizzjin)
A session renamed in Claude Code keeps its name. (#566, @Adam-Dalloul)
Closing settings brings back a workspace hidden to the tray, instead of leaving nothing on screen. (#565, @Adam-Dalloul)
The add-to-chat pill stays inside the editor on selections near the top of a file. (#576, @dawNotPoi)
Windows paths stop mixing separators, like the clone dialog's C:\work/codeg.
Connection secrets stay out of the logs, where raising the level used to dump the whole WebSocket handshake.

差异对比支持左右双栏。
Mermaid 图表有了自己的查看器。

差异可以左右对照着看，每个预览都有切换开关，两栏各自独立滚动。（#537、#570，@asteroida123）
Mermaid 图表有了自己的查看器——放到多大都清晰，可拖动、可全屏，能存成 SVG、PNG 或 .mmd。
选中消息里的一段话就能另开会话追问，新会话自动绑定写出这段话的智能体。
仓库面板里能看到条目的评论了，不再只有描述。
远端工作区连接可以携带自定义 HTTP 请求头，适用于 codeg-server 前面挡着一层需要特定请求头的代理。（#577，@codebutler）
窗口缩放上限提到 300%，Ctrl/Cmd + 与 - 可直接调整。（#484、#569，@Adam-Dalloul）
自定义 Codex 模型可以用在 OpenAI 兼容网关上了，新模板会按标准 Responses 协议发送请求。
Codex 在默认模式下也能向你提问，设置页新增了对应开关。
任务交付时可以顺手删掉工作树，和合并、完成用的是同一个勾选项。

内置智能体版本更新： OpenCode 1.18.23、Cline 3.0.60、CodeBuddy 2.139.0、DeepSeek Harness 0.7.0、Qoder 1.1.31。
DeepSeek Harness 改按解析后的真实路径恢复会话，/var 与 /private/var、Windows 短路径名不再导致失败。
「最近」列表可以收回第一页了，不必展开后一直占着屏幕。
议题任务必须先确认问题真的存在再动手，原先单列的「仅分析验证」模式随之取消。
输入框里待发送的图片也能右键复制了。（#556，@Adam-Dalloul）