docs(picker): record the pwsh-first DPI-aware Windows picker fix

README pairs document the pwsh-preferred adapter and the PowerShell 7
requirement for the modern dialog; the 2026-07-27 picker note's Windows
adapter fact is updated in place, and a new bug-fix note records the
defect, the fallback decision, and the DPI awareness rationale.

packages/host/directory-picker-native/README.i18n.yaml

@@ -2,5 +2,5 @@
 # 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 packages/host/directory-picker-native/README.md
-README.md: 0b54c651d4f5382021d0f8832ab4f1146b7652c8
-README.zh.md: e5ac2762a691a16a7e6d9d6dd9aefc70a59dcd4f
+README.md: ab4326fed886e9bb2fa550ae9865550eed7c2583
+README.zh.md: cb2e067d340df1696e1b1195ec99f6d63509cc20

packages/host/directory-picker-native/README.md

@@ -2,7 +2,7 @@
 
 English | [中文](README.zh.md)
 
-The **native-OS-chooser backend** of the [directory-picker seam](../directory-picker/README.md): `NativeDirectoryPicker` registers `ctx.directoryPicker` with the `native` capability, whose `pick(signal)` opens one native chooser per call and resolves the chosen absolute path (`null` on cancel). Platform tools run without a shell: `osascript` on macOS, an STA PowerShell `FolderBrowserDialog` on Windows, and Zenity with a KDialog fallback on Linux; the caller's abort terminates the native process. Only viable when the operator sits at the host's display — remote deployments compose [`-browse`](../directory-picker-browse/README.md) instead. The command boundary (`DirectoryPickerRunner`) and platform facts are injectable for deterministic tests. The shared no-shell subprocess runner lives in [`dsh-native-command`](../../util/native-command/README.md).
+The **native-OS-chooser backend** of the [directory-picker seam](../directory-picker/README.md): `NativeDirectoryPicker` registers `ctx.directoryPicker` with the `native` capability, whose `pick(signal)` opens one native chooser per call and resolves the chosen absolute path (`null` on cancel). Platform tools run without a shell: `osascript` on macOS, `pwsh` (PowerShell 7) with a Windows PowerShell 5.1 fallback on Windows — the dialog script opts the process into system DPI awareness — and Zenity with a KDialog fallback on Linux; the caller's abort terminates the native process. Only viable when the operator sits at the host's display — remote deployments compose [`-browse`](../directory-picker-browse/README.md) instead. The command boundary (`DirectoryPickerRunner`) and platform facts are injectable for deterministic tests. The shared no-shell subprocess runner lives in [`dsh-native-command`](../../util/native-command/README.md).
 
 **Dual-face package**: the browser half (`./client`) registers a renderless flow occupant into [ui-workspace's](../../client/ui-workspace/README.md) two directory-flow holes — each `open` request drives `host.pickDirectory` and reports the one outcome (picked path / cancel / failure) through the hole's owner conversation. One cordis.yml row therefore composes both sides of the native interaction; the client carries no capability-kind branching, and mounting a second flow package fails at load (the holes are `single` kind).
 
@@ -17,3 +17,4 @@ None; this package neither assembles nor sends a provider request.
 ## Known Limitations and Deferred Work
 
 - **Linux requires desktop tooling** — with neither Zenity nor KDialog installed, `pick` rejects with an actionable error; it does not fall back to a typed-path prompt (the browse backend is that fallback at the composition level).
+- **Windows needs PowerShell 7 for the modern picker** — `pwsh` renders the Explorer-style folder dialog; a machine with only Windows PowerShell 5.1 falls back to the legacy folder tree, DPI-corrected but not the modern UI.

packages/host/directory-picker-native/README.zh.md

@@ -2,7 +2,7 @@
 
 [English](README.md) | 中文
 
-[目录选择 seam](../directory-picker/README.md) 的**原生 OS 选择器后端**：`NativeDirectoryPicker` 以 `native` 能力注册 `ctx.directoryPicker`，其 `pick(signal)` 每次调用打开一个原生选择器并解析出所选绝对路径（取消时为 `null`）。平台工具不经 shell 调用：macOS 使用 `osascript`，Windows 使用以 STA 模式运行的 PowerShell `FolderBrowserDialog`，Linux 使用 Zenity 并以 KDialog 回退；调用方的中止信号会终止原生进程。只有操作者坐在宿主屏幕前时才可用——远程部署应组合 [`-browse`](../directory-picker-browse/README.md)。命令边界（`DirectoryPickerRunner`）与平台事实可注入，便于确定性测试。共享的免 shell 子进程运行器位于 [`dsh-native-command`](../../util/native-command/README.md)。
+[目录选择 seam](../directory-picker/README.md) 的**原生 OS 选择器后端**：`NativeDirectoryPicker` 以 `native` 能力注册 `ctx.directoryPicker`，其 `pick(signal)` 每次调用打开一个原生选择器并解析出所选绝对路径（取消时为 `null`）。平台工具不经 shell 调用：macOS 使用 `osascript`，Windows 使用 `pwsh`（PowerShell 7）并以 Windows PowerShell 5.1 回退——对话框脚本会把进程设为系统 DPI aware——Linux 使用 Zenity 并以 KDialog 回退；调用方的中止信号会终止原生进程。只有操作者坐在宿主屏幕前时才可用——远程部署应组合 [`-browse`](../directory-picker-browse/README.md)。命令边界（`DirectoryPickerRunner`）与平台事实可注入，便于确定性测试。共享的免 shell 子进程运行器位于 [`dsh-native-command`](../../util/native-command/README.md)。
 
 **双面包**：browser half（`./client`）向 [ui-workspace](../../client/ui-workspace/README.md) 的两个目录流洞注册一个无渲染的流程占用者——每次 `open` 请求驱动 `host.pickDirectory`，并经洞的 owner 会话上报唯一结果（所选路径／取消／失败）。因此一行 cordis.yml 同时组合原生交互的两侧；client 侧不含任何能力 kind 分支，挂载第二个流程包会在加载期失败（洞为 `single` kind）。
 
@@ -17,3 +17,4 @@
 ## 已知限制与延期工作
 
 - **Linux 依赖桌面工具**——Zenity 与 KDialog 均未安装时，`pick` 以包含解决建议的错误拒绝；它不会回退为手输路径提示（组合层面的回退是 browse 后端）。
+- **Windows 需要 PowerShell 7 才能使用现代选择器**——`pwsh` 呈现资源管理器风格的文件夹对话框；只有 Windows PowerShell 5.1 的机器会回退到旧版文件夹树，DPI 已修正，但界面不是现代的。