feat(desktop): add Fork to the Open menu

[eodwyrd]

Adds Fork (the Git client) as an option in the workspace Open dropdown, so you can jump from a workspace straight into Fork with the repo open.

Why

Finder and the editors are already there, but if you live in a Git GUI there's no quick way over. This scratches that itch. Related to #261 (more Open targets) — though that one's about editors, and this is a Git client, so figured it's worth its own small thing.

How it works

Fork's a repository GUI, so it always opens the workspace root (never a single file). It launches via the existing openMacApplication runtime helper — literally open -a Fork <repo> — the same mechanism Cursor/Zed already use when their CLI isn't around. No runtime changes needed, and it only shows up when Fork.app is actually installed.

I went with open -a Fork over Fork's fork CLI on purpose: the CLI is opt-in (you have to install it separately) and cwd-based, whereas the app bundle is always there once Fork's installed and reliably opens the repo as a tab.

Scope

macOS only for now — that's what I could actually test. Windows Fork launching can be a follow-up once someone can verify it.

One small quirk worth flagging: if Fork is fully quit, launching it opens the repo tab but Fork's own session-restore focuses whatever tab was last active rather than the one you just opened (it's still there, one click away). When Fork's already running it focuses the repo correctly. That's Fork's behaviour, not something we can override cleanly.

Screenshots (desktop / macOS)

Fork in the Open dropdown, with its icon:

The workspace it opens from:

How I verified

• Added registry tests: Fork shows on macOS when installed, opens the workspace root (ignores filePath), and is hidden when the app's missing or off-macOS.
• Ran it in the desktop app — Fork shows in the Open menu with its icon and opens the repo (screenshots above).
• npm run typecheck, npm run lint, npm run format, targeted vitest — all green.

[greptile-apps]

Greptile Summary

Adds Fork as a macOS-only Open-menu target.

• Registers Fork when /Applications/Fork.app, ~/Applications/Fork.app, or /System/Applications/Fork.app is present.
• Opens the workspace root through the existing macOS application launcher.
• Bundles a Fork icon and tests installation gating and launch behavior.

Confidence Score: 5/5

The PR appears safe to merge with no actionable defects identified.

Fork follows the established macOS target detection, icon-loading, registration, and application-launch paths, and the added tests cover the feature’s relevant platform and launch behavior.

Important Files Changed

Filename	Overview
packages/desktop/src/features/editor-targets/targets/fork.ts	Implements Fork detection and workspace-root launching consistently with the existing editor-target runtime.
packages/desktop/src/features/editor-targets/registry.ts	Registers the new Fork target in the existing target list without altering registry behavior.
packages/desktop/src/features/editor-targets/registry.test.ts	Covers macOS availability, off-platform hiding, missing-app handling, descriptor output, and workspace-root launching.
packages/desktop/assets/editor-targets/fork.png	Adds the valid PNG asset automatically included by the existing editor-target resource mapping.

_{Reviews (1): Last reviewed commit: "feat(desktop): add Fork to the Open menu" | Re-trigger Greptile}