supabase / supabase / 28600191407

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github

chore: UI theme cleanup (#47519)

## Problem

- We still use/maintain the legacy theming even though we moved to
Shadcn
- We have two themes list with similar code

## Solution

- Migrate some components to `cva` and `cn` instead of `styleHandler`
- Remove redundant `themes` in favor of `singleThemes`

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

* **Bug Fixes**
* Standardized theme selection across the app so theme menus
consistently offer the same light/dark/system options, including
dropdowns, navigation menus, and command menus.
* **Refactor**
* Refreshed styling for multiple shared UI components (menus, tabs, side
panels, loading indicators, icons, and modal dialogs) to improve
consistency while preserving visual behavior.
* **Chores**
* Improved the UI patterns CI “validate exports” check for clearer
failure output when exports change unexpectedly.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

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