supabase / supabase / 22612657635

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feat(studio): Display region-specific incidents in RegionSelector (#43308)

## 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?

Feature

## What is the current behavior?

Region-specific incidents are only shown in the global StatusPageBanner,
which doesn't clearly indicate that an incident only affects specific
regions during project creation.

## What is the new behavior?

Region-specific incidents are now displayed inline in the RegionSelector
with smart region matching to show which regions are affected. The
StatusPageBanner logic is updated to avoid duplicate incident notices
for region-specific incidents when creating projects.

## Additional context

<img width="1394" height="650" alt="CleanShot 2026-03-02 at 16 32 34@2x"
src="https://github.com/user-attachments/assets/fd3734dc-8049-4c24-82d8-456bfbdbd4fd"
/>

Resolves FE-2652

---------

Co-authored-by: Joshen Lim <joshenlimek@gmail.com>

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