## About The Pull Request
Makes Beaker Panel a TGUI so it actually works
<img width="787" height="295" alt="image"
src="https://github.com/user-attachments/assets/343056d2-f059-473d-a1eb-5604d2c3a38e"
/>
There's a lot more I want to do to this UI, namely UX and more features
(like changing grenade types) but I figured I should PR it now that it's
bare minimum functional so I don't get eaten by scope creep
Fixes#89954
## Changelog
🆑 Melbert
admin: Spawn-reagent-container works again, and it's a TGUI
/🆑
65bd5e581a