Files
supabase/apps/design-system/registry/default/example/admonition-button-split.tsx
Danny White 14fe0c0cc8 fix(studio): slightly round split-button corners on focus (#49129)
## What kind of change does this PR introduce?

UI polish for split buttons (primary action + dropdown chevron).
Follow-up to #49055.

## What is the current behavior?

The focus ring sits above the neighbouring half, but the inner edge
stays square, so the ring has two sharp corners at the join.

## What is the new behavior?

On keyboard focus, the squared-off edge uses a slight radius so the ring
matches the outer corners more closely. Resting state is unchanged.
Split-button callsites now share the same join classes as the
design-system example.

| Before | After |
| --- | --- |
| <img width="1030" height="296" alt="43471"
src="https://github.com/user-attachments/assets/9df3bd72-c7ac-4419-ae18-a7e649dc2d66"
/> | <img width="1056" height="276" alt="CleanShot 2026-08-17 at 10 45
09@2x"
src="https://github.com/user-attachments/assets/52e8a4dc-9c52-45ce-b4d0-f0e7b1b75935"
/> |

## To test

Tab to each half (labelled button, then chevron). Inner corners of the
focus ring should be slightly rounded, not square.

1. [Split with
dropdown](https://design-system-git-fix-split-button-focus-radius-supabase.vercel.app/design-system/docs/components/button#split-with-dropdown)
(no login)
2. [Access
Tokens](https://studio-staging-git-fix-split-button-focus-radius-supabase.vercel.app/dashboard/account/tokens)
→ Generate new token
3. Any project on [studio
staging](https://studio-staging-git-fix-split-button-focus-radius-supabase.vercel.app/dashboard/_/settings/general)
→ Settings → General → Restart project

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

## Summary by CodeRabbit

- **Accessibility**
  - Added accessible labels to dropdown and export controls.
- Improved keyboard-focus visibility, layering, and rounded edge
treatment across joined buttons and menus.
  - Removed misleading or redundant screen-reader text and titles.

- **Bug Fixes**
- Prevented split-button controls from shrinking or displaying awkward
borders and corners.
- Refined hover and focus behavior for action buttons throughout
settings, database, storage, account, and documentation interfaces.

- **Documentation**
- Clarified guidance for using overflow menus and responsive
split-button actions.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->
2026-08-17 17:28:22 +10:00

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import { ChevronDown } from 'lucide-react'
import {
Button,
DropdownMenu,
DropdownMenuContent,
DropdownMenuItem,
DropdownMenuTrigger,
} from 'ui'
import { Admonition } from 'ui-patterns/Admonition'
export default function AdmonitionButtonSplitDemo() {
return (
<Admonition
type="default"
layout="responsive"
title="Set up custom SMTP to edit templates"
description="Emails will be sent using the default templates. Set up custom SMTP to edit their subject and body."
actions={
<div className="flex w-full @lg:w-auto">
<Button
type="button"
variant="default"
className="flex-1 rounded-r-none px-3 @lg:flex-none hover:z-10 focus-visible:z-10 focus-visible:rounded-r-sm"
>
Set up SMTP
</Button>
<DropdownMenu>
<DropdownMenuTrigger asChild>
<Button
type="button"
variant="default"
aria-label="More email template editing options"
className="shrink-0 rounded-l-none px-[4px] py-[5px] -ml-px focus-visible:z-10 focus-visible:rounded-l-sm"
icon={<ChevronDown />}
/>
</DropdownMenuTrigger>
<DropdownMenuContent align="end" className="w-52">
<DropdownMenuItem>
<div className="flex flex-col gap-y-0.5">
<p className="block text-foreground">Upgrade to Pro</p>
<p className="block text-foreground-lighter text-balance">
Customize templates while using Supabases email service
</p>
</div>
</DropdownMenuItem>
<DropdownMenuItem>
<div className="flex flex-col gap-y-0.5">
<p className="block text-foreground">Configure Send Email hook</p>
<p className="block text-foreground-lighter text-balance">
Send auth emails through your own workflow
</p>
</div>
</DropdownMenuItem>
</DropdownMenuContent>
</DropdownMenu>
</div>
}
/>
)
}