Fixes #1717 

<!-- CURSOR_SUMMARY -->
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> [!NOTE]
> Disable `.app-region-drag` while `body[data-scroll-locked]` is present
to prevent drag interference with open Select.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
8d5e4774dfa924e073d79dc999a5f065425e985b. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->







<!-- This is an auto-generated description by cubic. -->
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## Summary by cubic
Fixes window dragging interfering with the Supabase project dropdown.
Disables dragging on .app-region-drag while the Radix Select is open by
targeting body[data-scroll-locked], so users can scroll and select
normally.

<sup>Written for commit 8d5e4774dfa924e073d79dc999a5f065425e985b.
Summary will update automatically on new commits.</sup>

<!-- End of auto-generated description by cubic. -->