fix(web): show the configured stash shortcut

[UtkarshUsername]

Fixes #8369

What Changed

The empty stash state now displays the effective configured composer.stash shortcut instead of hardcoding ⌘S. The shortcut label is platform-aware and custom-keybinding aware. If stash is unbound, the empty state does not advertise a shortcut.

Why

The stash action already resolves the active keybinding, but the empty-state copy always showed ⌘S, which was incorrect on Windows/Linux and after customizing or removing the binding. Passing the resolved display label from ChatComposer keeps the UI aligned with the behavior.

UI Changes

Before:

After:

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for any UI changes

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Note

Low Risk
Copy-only UI change in the composer stash empty state with no auth, data, or behavior changes beyond displayed shortcut text.

Overview
The empty stash drawer no longer hardcodes ⌘S. ChatComposer now passes the resolved composer.stash display label via shortcutLabelForCommand, matching platform and custom keybindings.

ComposerStashMenu takes a new stashShortcutLabel prop (string | null). When set, the empty state adds “Press {label} with a prompt…”; when stash is unbound, it only shows “Nothing stashed yet.” Tests cover both cases.

^{Reviewed by Cursor Bugbot for commit d0709a7. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Show configured stash shortcut in ComposerStashMenu

Passes a dynamic shortcut label for the composer.stash command from ChatComposer.tsx into ComposerStashMenu.tsx. The empty-state helper text now appends 'Press {stashShortcutLabel} ...' only when a label is provided, and omits shortcut guidance when the command is unbound. Tests in ComposerStashMenu.test.tsx cover both the bound and null-label cases.

^{Macroscope summarized d0709a7.}

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[macroscopeapp]

Approvability

Verdict: Approved at d0709a7

Macroscope's review found this PR approvable — This is a small, focused UI fix that replaces a hardcoded stash shortcut with the effective configured binding and handles unbound shortcuts cleanly. Existing stash behavior is unchanged, and focused tests cover both display cases.

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