feat(desktop): add stash to composer context menu

[edoedac0]

The Electron composer context menu only exposed the standard editing actions, so prompt stashing was discoverable through the keyboard shortcut and stash badge but not from the native right-click menu.

This adds a native Stash item with the platform CmdOrCtrl+S accelerator when the context-menu target is the active chat composer. The main process dispatches the existing composer.stash menu action back to the renderer, where it shares the same guarded stash path as the keyboard shortcut. Other editable fields keep the existing native menu unchanged, and composer states where stashing is unavailable do not advertise the action.

User impact: desktop users can stash the current prompt directly from the existing Cut/Copy/Paste/Select All menu without changing web or mobile context-menu behavior.

Validation

• pnpm exec vp test run apps/desktop/src/window/DesktopWindow.test.ts apps/web/src/keybindings.test.ts apps/web/src/promptStashStore.test.ts (78 tests passed)
• targeted lint for the four changed files
• pnpm exec vp run --filter @t3tools/web --filter @t3tools/desktop typecheck
• manual Electron verification: the macOS native menu exposed Cut, Copy, Paste, Select All, and Stash; selecting Stash used the existing stash flow

Visual verification

Before	After

Note

Add Stash option to the native context menu in the desktop composer

• Adds a 'Stash' menu item (Cmd/Ctrl+S) to the native right-click context menu in DesktopWindow.ts, shown only when the click target is inside an element marked with data-composer-stash.
• Clicking the item sends a composer.stash action over MENU_ACTION_CHANNEL to the renderer; ChatComposer.tsx handles this via desktopBridge.onMenuAction and routes it through the existing stash gate.
• The data-composer-stash attribute is conditionally added to the composer container when stashing is allowed (not in approval, no pending inputs, no active progress), enabling the hit-test in Electron.
• Zoom factor is applied when converting window pixel coordinates to CSS pixels for accurate hit testing.

^{Macroscope summarized 17b7d6e.}

---

Note

Low Risk
Desktop-only UX wiring reuses the existing stash guards and menu-action channel; no auth, persistence, or web behavior changes.

Overview
Desktop users can Stash the current prompt from the native right-click menu on the chat composer, not only via the keyboard shortcut.

In DesktopWindow, editable context menus run a zoom-adjusted elementFromPoint hit-test for [data-composer-stash] before showing the menu. When the target is the composer, the menu adds Stash (CmdOrCtrl+S), which sends composer.stash over the existing menu-action IPC channel.

In ChatComposer, the editor wrapper gets data-composer-stash only when stashing is allowed; stash eligibility and execution are centralized in runStashCommand, used by both the shortcut handler and desktopBridge.onMenuAction. Other editable fields keep the standard Cut/Copy/Paste menu without Stash.

Tests cover composer vs non-composer menus, zoom-adjusted coordinates, and the IPC payload on Stash click.

^{Reviewed by Cursor Bugbot for commit 17b7d6e. Bugbot is set up for automated code reviews on this repo. Configure here.}

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[cursor]

Cursor Bugbot has reviewed your changes using high effort and found 1 potential issue.

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[macroscopeapp]

Approvability

Verdict: Needs human review

This PR adds a new 'Stash' option to the desktop app's native context menu, which is a new user-facing feature. It involves cross-process DOM detection and new IPC message handling between Electron's main process and the renderer.

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