supabase / supabase / 28229926746

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Fix: improve accessibility for icon buttons (#47214)

## I have read the
[CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md)
file.

YES

## What kind of change does this PR introduce?
Bug fix (accessibility improvement)

## What is the current behavior?

Icon-only buttons do not have explicit accessible names for screen
readers.

## What is the new behavior?

All icon-only buttons now have explicit accessible names using visually
hidden text (sr-only), ensuring proper screen reader support.

## Additional context

Tooltip text is preserved or added for visual users.
No visual changes were introduced.

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

## Release Notes

* **New Features**
* Added hover tooltips across the database editor and SQL editor,
including “More options” menus, table filter controls, and the “Create a
new query” action.

* **Accessibility**
* Improved button accessibility by adding/expanding `aria-label`s for
Intellisense, favorites (add/remove), and “Prettify SQL.”
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

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