Danny White b10511052d fix(ui): share raised styling across dropdown triggers (#50830)
## Problem

Select, combobox and empty multi-select triggers use a flat border
treatment, while the default Button has a raised surface and shadow.
This makes dropdown controls look inconsistent when closed.

## Solution

Share the existing Button shadow variables and raised surface classes
with the select trigger CVA. SelectTrigger and ComboboxTrigger keep
their own layout, focus, and disabled behaviour.

The multi-select shares the raised surface when empty and keeps a sunk
field surface for selected chips. Static size classes keep its empty and
single-row selected states at the same height; wrapped badges can still
grow. The caret stays aligned as values are selected. Select, Combobox
and Multi-select share Button's size-specific corner radii. Button's
existing styling is preserved.

| Before | After |
| --- | --- |
| <img width="518" height="180" alt="CleanShot 2026-09-24 at 13 36
32@2x"
src="https://github.com/user-attachments/assets/3822e51f-b1c5-46a2-b268-0bf08a03ae06"
/> | <img width="534" height="224" alt="CleanShot 2026-09-24 at 13 36
41@2x"
src="https://github.com/user-attachments/assets/e553c973-3d21-4228-ae6f-d3c098d051d3"
/> |
| <img width="638" height="148" alt="CleanShot 2026-09-24 at 15 08
01@2x"
src="https://github.com/user-attachments/assets/6d0c3dfe-3392-4b76-ae61-b6aa7a09583d"
/> | <img width="658" height="148" alt="CleanShot 2026-09-24 at 15 08
17@2x"
src="https://github.com/user-attachments/assets/184c50c3-b951-410e-89d5-3b1c2ee8f3b8"
/> |
| <img width="482" height="162" alt="CleanShot 2026-09-24 at 15 07
22@2x"
src="https://github.com/user-attachments/assets/a088d832-d0a9-45c5-a272-9c84cc601d1d"
/> | <img width="490" height="168" alt="CleanShot 2026-09-24 at 14 59
52@2x"
src="https://github.com/user-attachments/assets/4df0ca29-53d8-4926-80db-1cafb705faad"
/> |

## Review instructions

1. Open the design system
[Select](https://design-system-git-dnywh-dropdown-trigger-surface-supabase.vercel.app/design-system/docs/components/select),
[Combobox](https://design-system-git-dnywh-dropdown-trigger-surface-supabase.vercel.app/design-system/docs/components/combobox)
and
[Multi-select](https://design-system-git-dnywh-dropdown-trigger-surface-supabase.vercel.app/design-system/docs/fragments/multi-select)
examples.
2. Compare the closed surfaces and corner radii with a default Button,
then check hover, focus and open states.
3. Select one or two multi-select items. Check that a single row remains
the same height as the empty control, the caret stays aligned and the
chip field remains distinct. Add enough items to check wrapping.

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

## Summary

* **Style**
* Default buttons display a raised surface with a subtle shadow and
size-appropriate rounded corners.
* Select and combobox triggers share a raised, card-like appearance,
with consistent shadows and rounded corners at small sizes. Invalid
select triggers display a border.
* Empty multi-select controls use a raised surface, while controls with
selected values use a field-style surface.
* Small and tiny multi-select controls have updated spacing and sizing
in empty and selected states.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
2026-09-28 14:26:47 +10:00
2026-09-18 10:38:49 +10:00
2025-06-17 11:08:46 +02:00
2024-01-10 13:34:41 +01:00
2021-07-25 12:45:26 +08:00

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