[FEATURE] Add JetBrains IDEs and Sublime Text to Desktop app 'Open in editor' dropdown

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

The Claude Desktop app's code review UI has an "Open in editor" dropdown that currently only supports four hardcoded editors: VS Code, Cursor, Zed, and Xcode (defined in the app bundle JS). Users who primarily use JetBrains IDEs (IntelliJ IDEA, PyCharm, WebStorm, DataGrip) or Sublime Text have no way to open reviewed code directly in their preferred editor from the Desktop app.

This is particularly frustrating because these editors are fully installed and registered with macOS Launch Services, and the JetBrains IDEs already have Claude Code MCP server integrations — yet they don't appear in the dropdown.

Proposed Solution

1. Short-term: Add support for popular editors that are currently missing: IntelliJ IDEA, PyCharm, WebStorm, DataGrip, Sublime Text, and other commonly used editors.
2. Long-term: Make the editor list dynamically detected (query macOS Launch Services for installed apps that can handle source code files) or make it user-configurable via the Desktop app preferences, rather than maintaining a hardcoded list.

Alternative Solutions

• Using the JetBrains Claude Code plugin directly within the IDE — works but doesn't help when reviewing code in the Desktop app.
• Clicking "Show in folder" and then opening the file manually — extra friction.
• Installing one of the four supported editors just for this feature — not ideal.

Priority

Medium - Would be very helpful

Feature Category

Configuration and settings

Use Case Example

1. A teammate shares a Claude Desktop conversation with code changes for review
2. I open the code review UI in Claude Desktop and want to inspect the changes in my IDE
3. I click the "Open in editor" dropdown but only see Xcode, despite having PyCharm, WebStorm, IntelliJ IDEA, and Sublime Text installed
4. With this feature, I'd see all my installed editors in the dropdown and could open the file directly in PyCharm or whichever IDE is appropriate for the project

Additional Context

The editor list is currently hardcoded in the app bundle at ion-dist/assets/v1/c14700b8b-DSl9WQyJ.js with entries for VS Code, Cursor, Zed, and Xcode only. The constant claude-code-preferred-editor stores the user's selection.

Screenshot of current state (only Xcode visible since it's the only supported editor installed):

!editor-dropdown

Related closed issue: #17855 (Sublime Text support request, closed as stale)