[BUG] Markdown file links resolve against launch directory, not the session's worktree, after EnterWorktree

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Markdown file links resolve against launch directory, not the session's worktree, after EnterWorktree

They open from the original launch directory (the main checkout) — a stale copy on a different branch. Absolute paths in hrefs are the only workaround, and relative links inside rendered markdown files misresolve the same way.

The harness and the UI disagree about what "working directory" means after EnterWorktree — one of them should win consistently.

What Should Happen?

The file opens from the worktree (the session's working directory).

Error Messages/Logs

Steps to Reproduce

1. Start a session in a repo checkout;
2. the session calls EnterWorktree, which creates .claude/worktrees/<name> and moves the session's working directory there;
3. the model emits [docs/README.md](docs/README.md) — correct per the system prompt's "path relative to the working directory" instruction;
4. click the link in the desktop app.

Claude Model

Other

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

1.32352.1

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

Prior report #17927 was closed as stale without detail.