Vouch requests: Allow pointer constraints to work on subsurface

[Shiphan]

Repos I am interested in contributing to

hyprland

What I want to contribute right now

follow up on hyprwm/Hyprland#15435

Why the above bug / feature specifically?

Godot use subsurface to embed game window into editor and debug window.

I acknowledge that:

• I have read the AI Usage Policy and agree to follow it.

• I have read the Code of Conduct and agree to follow it.

• I wrote this request with my own hands, my own keyboard, and in my own words.

[vaxerski]

welcome aboard!