Desktop app: folder links in chat open an empty file pane; no one-click open in Explorer/Finder

What I'm trying to do

Claude writes deliverables to local folders all day (reports, exports, generated files). I want its chat replies to include a link to the output folder that opens in Windows Explorer when clicked.

What works today

2 link formats get a right-click → "Open in Explorer" option in chat, and it works:

• Markdown links with explicit file:/// hrefs, e.g. [output](file:///C:/Users/me/Documents) (spaces as %20 work too)
• Bare absolute Windows paths in prose, which the app auto-linkifies, e.g. C:\Users\me\project\out.pdf

So the current floor is 2 clicks: right-click, then Open in Explorer.

What doesn't work

1. Left-clicking a file:/// link that points at a directory opens the file pane sidebar, and it renders completely empty. No listing, no error, no Explorer. This is the main gap: the natural click does nothing useful for folders.
2. Markdown links whose href is a plain path (C:/Users/me/Documents, relative paths like Documents) are treated as ordinary web links: context menu only has Copy link, no Open in Explorer.
3. Non-http/non-file URI schemes in chat links are swallowed silently (tested ms-settings:display, nothing happens), so registering a custom protocol handler as a workaround isn't possible either.

Ask

• Left-click on a directory target (file:/// href or auto-linkified path) opens it in the OS file manager (Explorer on Windows, Finder on Mac). Alternatively: render the directory listing in the file pane with an "Open in Explorer" button.
• Smaller: treat plain-path markdown hrefs the same as bare paths so they get the file-path context menu instead of the generic link one.

Repro

1. Have Claude output [test](file:///C:/Users/<you>/Documents) in a desktop app session
2. Left-click the link → sidebar opens empty
3. Right-click the link → "Open in Explorer" → works

Environment

• Claude Code desktop app 1.11847.5.0 (MSIX) on Windows 11 Home, build 26200