Merge remote-tracking branch 'origin/master' into codex/status-bar-token-metrics

# Conflicts:
#	packages/client/ui-conversation/README.i18n.yaml
#	packages/host/apiproxy/README.i18n.yaml
#	packages/host/apiproxy/README.md
#	packages/host/apiproxy/README.zh.md
#	packages/host/apiproxy/src/api-proxy.ts

.agents/notes/implemented/feature/2026-07-28-tool-call-file-open-in-os.i18n.yaml

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+# Bilingual-pair consistency record (docs/i18n/README.md): the git blob hash of each
+# side as of the last confirmed-consistent state. Both languages carry equal authority;
+# after editing either side, bring the other along and re-record with:
+#   pnpm run verify-translation-pairing --write .agents/notes/implemented/feature/2026-07-28-tool-call-file-open-in-os.md
+2026-07-28-tool-call-file-open-in-os.md: a2c9b52507d32c2d851f811f0ecdd878a60b1e1c
+2026-07-28-tool-call-file-open-in-os.zh.md: efb4c39503d9de71a9d773bdae7fac4fb2b08ee3

.agents/notes/implemented/feature/2026-07-28-tool-call-file-open-in-os.md

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+# Agent Note: Tool-call file open in OS
+
+Status: implemented
+
+English | [中文](2026-07-28-tool-call-file-open-in-os.zh.md)
+
+## Problem
+
+Chat tool rows treated the whole summary line as a click target that opened the right-hand details panel, with a hover background on the row. For filesystem tools the useful action is opening the mentioned file in the operating system's default application, not inspecting the raw tool payload in a sidebar.
+
+## Decision
+
+File-tool path summaries (`read` / `write` / `edit` args carrying `path` or `file_path`) render as hover-underline links with a pointer cursor. Clicking the path calls `host.openPath` through `WorkspacesService.openPath`, resolving relative paths against the session cwd. File-link rows disable args expand (leading icon is inert); whole-row click, row hover fill, and the click-to-open-details gesture are removed from tool rows (including bash and todo registrations). The details panel and its inject surface remain for programmatic selection; rows no longer drive them.
+
+`host.openPath` is a privileged unary RPC accepted only from loopback, same-origin browser requests (same carrier guard as `host.pickDirectory`). Platform adapters open without a shell: `open` on macOS, PowerShell `Invoke-Item` on Windows, `xdg-open` on Linux. The opener is injectable for tests. URL-only read args (`web_fetch`) are not file links.
+
+## Alternatives considered
+
+- Keep row-click details and add a separate file affordance — rejected; the product ask replaces the row gesture with the file link.
+- Open files inside an in-app preview — rejected; the ask is the OS default application.
+- Reuse `host.pickDirectory`'s timeout exemption — unnecessary; path open hand-off completes quickly under the normal unary deadline.
+
+## Consequences
+
+Clicking a file path in a tool row opens that path on the host. Non-file tool rows are inert summaries (expand toggles remain where the row already supported them). Remote or non-loopback clients cannot invoke `host.openPath`.
+
+## Risks
+
+- Linux hosts without `xdg-open` fail the RPC; the chat row stays silent while the host returns an internal error.
+- Relative paths without a session cwd are forwarded verbatim and may fail on the host.

.agents/notes/implemented/feature/2026-07-28-tool-call-file-open-in-os.zh.md

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+# Agent Note: 在工具调用中用系统应用打开文件
+
+Status: implemented
+
+[English](2026-07-28-tool-call-file-open-in-os.md) | 中文
+
+## Problem
+
+聊天工具行把整行摘要当作点击目标，点击后打开右侧 details 面板，并带有整行悬停背景。对文件系统工具而言，有用的动作是用操作系统默认应用打开所涉文件，而不是在侧栏里查看原始工具载荷。
+
+## Decision
+
+文件工具的路径摘要（`read`／`write`／`edit` 参数中的 `path` 或 `file_path`）渲染为悬停下划线链接并使用 pointer 光标。点击路径会经 `WorkspacesService.openPath` 调用 `host.openPath`，相对路径相对会话 cwd 解析。带文件链接的行关闭参数展开（左侧图标不可点）；工具行（含 bash 与 todo 注册）去掉整行点击、整行悬停底色，以及点击打开 details 的手势。details 面板及其 inject 面仍保留供程序化选择；工具行不再驱动它们。
+
+`host.openPath` 是特权一元 RPC，仅接受来自回环、同源浏览器请求（与 `host.pickDirectory` 相同的载体守卫）。平台适配器不经 shell 打开：macOS 为 `open`，Windows 为 PowerShell `Invoke-Item`，Linux 为 `xdg-open`。打开器可在测试中注入。仅含 URL 的 read 参数（`web_fetch`）不是文件链接。
+
+## Alternatives considered
+
+- 保留整行点击打开 details，另加文件入口 — 否决；产品要求用文件链接替换整行手势。
+- 在应用内预览文件 — 否决；要求是操作系统默认应用。
+- 复用 `host.pickDirectory` 的超时豁免 — 不必要；打开路径的交接在常规一元截止时间内即可完成。
+
+## Consequences
+
+点击工具行中的文件路径会在宿主上打开该路径。非文件工具行是惰性摘要（行内已有的展开开关仍保留）。远程或非回环客户端无法调用 `host.openPath`。
+
+## Risks
+
+- 没有 `xdg-open` 的 Linux 宿主会使 RPC 失败；聊天行保持静默，宿主返回 internal 错误。
+- 没有会话 cwd 时相对路径会原样转发，可能在宿主侧失败。