Add VS Code Insiders and VSCodium to Open In editor picker

[nassimna]

Adds VS Code Insiders and VSCodium to the existing Open In editor flow.

What changed:

• extend shared editor contracts with vscode-insiders and vscodium
• use per-editor supportsGoto metadata so --goto works for both editors
• update the web Open menu to surface the new editors when installed
• add server and browser tests for availability detection, picker filtering, and open dispatch

Why:

• this follows the existing editor integration pattern instead of introducing a separate code path
• the change is scoped to the current Open In feature only
• behavior stays predictable: editors only appear when their CLI is available on PATH

Validation:

• bun run test src/open.test.ts in apps/server
• bun run test:browser src/components/ChatView.browser.tsx in apps/web
• bun fmt
• bun lint
• bun typecheck

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Note

Low Risk
Low risk: scoped to editor picker/launch wiring and editor availability detection, with added test coverage; main risk is incorrect CLI mapping or --goto behavior for the new editors.

Overview
Adds VS Code Insiders (code-insiders) and VSCodium (codium) as supported targets in the “Open in editor” flow, surfacing them in the web picker only when detected as installed.

Extends the shared EDITORS contract with per-editor supportsGoto metadata and updates server launch resolution to use it so line/column paths use --goto for all supporting editors. Updates/expands server + browser tests to cover availability detection, picker filtering, selection/fallback behavior, and open dispatch for the new editors.

^{Written by Cursor Bugbot for commit 78661af. This will update automatically on new commits. Configure here.}

Note

Add VS Code Insiders and VSCodium to the Open In editor picker

• Adds vscode-insiders and vscodium editor definitions to packages/contracts/src/editor.ts, each with supportsGoto=true, and exposes them in the picker in apps/web/src/components/chat/OpenInPicker.tsx.
• Refactors shouldUseGotoFlag in apps/server/src/open.ts to accept a full editor definition object and use the supportsGoto flag, replacing the previous hardcoded check for cursor and vscode.
• Adds a supportsGoto boolean to all existing editor definitions (zed, antigravity, and file-manager set to false).
• Behavioral Change: --goto is now driven by supportsGoto on the editor definition rather than a hardcoded id list, so any future editor with supportsGoto=true will automatically get line/column support.

^{Macroscope summarized 78661af.}

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[Spitfire1900]

This needs https://github.com/nassimna/t3code/blob/main/apps/web/src/components/Icons.tsx#L23 updated to include VisualStudioCodeInsiders based on https://github.com/vscode-icons/vscode-icons/blob/dd2bedbdd7f952974598a81271a10e2c4723a87a/icons/file_type_vscode-insiders.svg