[FEATURE] Add option to disable git worktree creation by default for new sessions in Claude Code Desktop

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Summary

Claude Code Desktop (v1.5354.0, claude-code 2.1.121) creates a new git worktree
under <project>/.claude/worktrees/<name>/ for every new session by default.
There is no user-facing toggle to opt out — only a "Worktree location" dropdown
that controls where worktrees are stored, not whether they're created.

What's missing

The internal useWorktree flag exists per session and defaults to true
(useWorktree !== false). A non-worktree path also exists ("In-folder session"
in the binary). But neither the CCD GUI nor ~/.claude/settings.json exposes a
way to flip the default.

Requested

Either of:

• A global toggle in CCD Settings: "Use git worktree for new sessions" (on/off)
• A worktree.useByDefault: false field in settings.json
• An "In-folder session" option in the new-session shortcut/dialog (Cmd+N)

Why

Some workflows (small repos, quick edits, hardware/CAD repos with binary
artifacts) don't benefit from per-session isolation, and the worktree dir
clutters the project. A memory note ("don't edit in worktree") helps inside
the session but doesn't prevent CCD from creating it before launch.

Environment

• macOS 15 (Darwin 25.3.0)
• Claude Desktop 1.5354.0
• claude-code 2.1.121

Proposed Solution

See above in the Claude written Problem Statement.

Alternative Solutions

See above in the Claude written Problem Statement.

Priority

Medium - Would be very helpful

Feature Category

Configuration and settings

Use Case Example

_No response_

Additional Context

_No response_