Worktree button greyed out with 'Worktree requires a git repository' in valid git repo

Description

The worktree button in the Claude Code desktop app is greyed out with tooltip "Worktree requires a git repository" despite the project being a valid git repository with an active .git directory (not a file) and 10 existing worktrees.

Environment

• Claude Code desktop app (latest version, updated 2025-02-04)
• macOS Darwin 25.2.0 (arm64)
• Project: local directory selected via project picker
• .git is a proper directory (not a worktree .git file)
• git rev-parse --is-inside-work-tree returns true
• Repo already has 10 active worktrees created via CLI (git worktree list)

Steps to reproduce

1. Open Claude Code desktop app
2. Select a local project that is a valid git repository
3. Observe the worktree button (branch icon, second icon in toolbar) is greyed out
4. Hover over it -- tooltip says "Worktree requires a git repository"

Expected behavior

Worktree button should be enabled since the project is a valid git repository.

Actual behavior

Button is greyed out, tooltip says "Worktree requires a git repository."

Screenshot

<img width="885" height="157" alt="Image" src="https://github.com/user-attachments/assets/1ed0cef0-7479-432c-8eb3-4d6daf64b0a6" />