Danny White 8204854986 docs(design-system): document create actions in comboboxes (#51061) ...

## Problem

Studio lets people create an item while selecting one, but the design
system does not document this pattern.

## Solution

Document the create action in the Combobox guide with a focused example.
The action sits below the options and leaves the current selection
unchanged. Products can connect it to their own creation flow.

| After |
| --- |
| <img width="552" height="352" alt="CleanShot 2026-09-30 at 10 57
46@2x"
src="https://github.com/user-attachments/assets/69c8069c-d4f9-45e2-b3a1-6e5431e2aff9"
/> |

## Review instructions

1. Open the design system Combobox page and find “[Create from
list](https://design-system-git-dnywh-document-select-create-action-supabase.vercel.app/design-system/docs/components/combobox#create-from-list)”.
2. Select a bucket, then choose “New bucket”. Because it’s just an
example, the selector closes without replacing the selected bucket.

## Checklist

- [x] I have read
[CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md).


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Added a combobox example with a separate “New bucket” action. Choosing
it closes the menu without changing the current selection; choosing an
existing bucket updates the selection.
* Added documentation showing how to use this create-action pattern,
including guidance on labeling and positioning the action.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

2026-09-30 15:40:50 +10:00

..

block

fix(ui): align primary colours across text, buttons, and controls (#50697)

2026-09-24 09:56:31 +10:00

example

docs(design-system): document create actions in comboboxes (#51061)

2026-09-30 15:40:50 +10:00