[codex] Add close file menu item

[samuelstroschein]

Summary

• Add a native File > Close File menu item.
• Send a workspace close-file event from Electron to the renderer.
• Close the active central file tab from the shell when that native command fires.

Validation

• ./node_modules/.bin/vitest run src/shell/layout-shell.test.tsx
• ./node_modules/.bin/vitest run src/extensions/files/index.test.tsx
• ./node_modules/.bin/tsc -p . --pretty false
• node --check electron/main.mjs && node --check electron/preload.mjs
• git diff --check HEAD~1..HEAD

---

Note

Low Risk
Desktop menu and renderer tab-close wiring only; reuses existing close-view logic with no auth or persistence changes beyond menu refresh.

Overview
Adds a native File > Close File action on desktop, wired the same way as New File: the main process focuses the target workspace window and sends workspace:closeFile to the renderer.

The menu item is enabled only when that window has an active document (tracked via activeFilePathsByWindowId), and the app menu is refreshed when the active file path changes so the control stays in sync. Preload and desktop types expose onCloseFile for the shell.

V2LayoutShell subscribes to that event and closes the active central tab through the existing handleCloseView path. A layout-shell test covers the native close flow.

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	flashtype-website	5343935	Commit Preview URL Branch Preview URL	Jun 29 2026, 10:34 PM