Add common Linux editor open targets

[ohnicholas93]

Summary

• add Linux editor open targets for Cursor, VS Code, VS Code Insiders, Windsurf, Antigravity, and Zed
• detect editors from PATH first, then matching .desktop entries including AppImage, Flatpak, Snap, and XDG application directories
• launch desktop-entry backed editors through the desktop launcher path so wrapped Flatpak/AppImage installs work instead of invoking wrapper binaries directly

User-visible behavior

Linux users should see supported installed editors in the Open in... destination list instead of only File Manager. This improves common installs where the editor is exposed through a desktop entry rather than a plain PATH binary, such as Cursor AppImage and Zed Flatpak installs.

Scope notes

This stays in the core Linux compatibility patch because these editor destinations mirror upstream desktop open-target behavior and are Linux port glue, not an opt-in extra feature. The change is limited to the main-process patch and its targeted regression tests.

Validation

• node --test scripts/patch-linux-window-ui.test.js
• node --test linux-features/zed-opener/test.js linux-features/open-target-discovery/test.js
• git diff --check

Note

This overlaps with the linux-features/zed-opener use case by adding common upstream editor targets to the core Linux path. I’m happy to adjust the scope if maintainers prefer this to remain opt-in.

[ilysenko]

Thanks for the PR. I like the direction, but I do not want this to live in the core main-process patch.

Please move all of this out of scripts/patches/main-process.js and into linux-features. We already have linux-features/open-target-discovery, which is probably the right home for most of this work: it is disabled by default and already covers Linux editor / terminal / desktop-entry discovery. If that feature does not fit cleanly, a new disabled-by-default feature is also fine.

The core applyLinuxFileManagerPatch should stay focused on the minimal File Manager compatibility path only. This PR currently adds broad editor discovery and launching logic there: Cursor, VS Code, VS Code Insiders, Windsurf, Antigravity, Zed, PATH lookup, .desktop parsing, XDG / Flatpak / Snap directories, and gio / gtk-launch launching. That is useful optional Linux UX, but it should not be enabled for every Linux build by default.

Please also move the new regression coverage into the feature-level test suite, and keep a test proving the feature is disabled unless explicitly listed in linux-features/features.json.

Happy to review again once the change is isolated as an opt-in Linux feature.