[FEATURE] Desktop app: default editor for opening file paths (skip the 'Open in' context menu)

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

In the Claude Code desktop app, opening a file path from a chat response in an external editor requires right-clicking the path and picking an editor from the "Open in" submenu every single time. There is no way to set a preferred/default editor, and the menu does not remember the last-used choice.

Coming from the CLI running inside an IDE terminal (e.g. Cursor), where clicking a file link opens it directly in the IDE, this is a noticeable regression in workflow: what used to be one click is now right-click → hover submenu → select editor, repeated for every file, dozens of times a day.

Related prior requests were closed without resolution:

• #50182 (configurable "Open in" editor list) — auto-closed as duplicate of #42222
• #42222 (add more editors to the hardcoded dropdown) — auto-closed as stale ("not planned"), now locked

Both confirm the editor list is hardcoded in the app bundle with no user configuration.

Proposed Solution

Add a way to set a default editor for opening file paths, any of:

1. A preferredEditor (or similar) setting — in the desktop app's preferences UI and/or settings.json — so a plain left-click on a file path opens it directly in that editor.
2. At minimum: remember the last-used editor per machine (or per project) and surface it as the primary/default action, with the full submenu still available for one-off choices.
3. Optionally honor an ordering/config for the "Open in" list (which would also address #50182 / #42222).

Use Case

I work in Cursor. Every file the desktop app lists in a response summary is a file I may want to jump to in my IDE. With a default editor setting, that's a single click per file instead of a three-step context-menu dance. The same applies to anyone anchored to one editor (VS Code, Zed, JetBrains, …).

Platform

macOS, Claude Code desktop app.