fix(web): close slash and mention menus on click outside

[tomsen-ai]

Closes #947

This PR closes the slash menu and @ mention menu when the user clicks outside the composer input area.

What changed

• Added a cinWrapRef to the composer input wrapper.
• Added a document click listener while either menu is open.
• Clicking outside .cin-wrap now closes both menus, matching the behavior of other dropdowns in the composer (e.g., the permission dropdown).
• Removed the listener when both menus are closed or when the component unmounts.

How to verify

1. Open Kimi Web and start a session.
2. Type / in the composer — the slash menu appears.
3. Click outside the menu (e.g., on the chat history) — the menu should close.
4. Repeat with @ — the mention menu should also close on outside click.
5. Confirm that Esc, selecting an item, and submitting a message still close the menus as before.

Notes

• This is a small focused UI fix; no public API changes.
• A changeset has been added for @moonshot-ai/kimi-web.

[changeset-bot]

🦋 Changeset detected

Latest commit: 6f448dc

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@moonshot-ai/kimi-web	Patch

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[chatgpt-codex-connector]

Cancel pending mention lookups on outside clicks

When a user types @ and clicks the chat area before the 200 ms mention debounce fires, mentionOpen is still false, so this watcher has not installed the document click listener yet. The pending mentionTimer callback can then run after the composer has lost focus and set mentionOpen = true, leaving the mention menu open even though the user already clicked outside; the outside-close path needs to cancel pending mention work or listen while a mention search is pending.

Useful? React with 👍 / 👎.

[tomsen-ai]

Hi team, this PR is now rebased onto the latest main and ready for review.

What it fixes: the slash (/) and mention (@) popup menus in Composer.vue did not close when clicking outside the composer area.

What changed:

• Added a document-level click listener while either menu is open.
• Clicking inside the composer wrapper keeps the menu open; clicking anywhere outside closes both menus.
• Clears the pending mention search debounce timer on outside click so the menu doesn't reopen after an async search returns.

I verified the fix manually in the local dev server. Thanks for taking a look!