Scale text in admin player overlay (#31503)

* Scale text in admin player overlay

Fixes #30040

* Feedback from PR - get UI scale through root window

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Co-authored-by: Eoin Mcloughlin <helloworld@eoinrul.es>

Content.Client/Administration/Systems/AdminSystem.Overlay.cs

@@ -1,6 +1,8 @@
 using Content.Client.Administration.Managers;
 using Robust.Client.Graphics;
 using Robust.Client.ResourceManagement;
+using Robust.Client.UserInterface;
+using Robust.Shared.Configuration;
 
 namespace Content.Client.Administration.Systems
 {
@@ -11,6 +13,7 @@ namespace Content.Client.Administration.Systems
         [Dependency] private readonly IClientAdminManager _adminManager = default!;
         [Dependency] private readonly IEyeManager _eyeManager = default!;
         [Dependency] private readonly EntityLookupSystem _entityLookup = default!;
+        [Dependency] private readonly IUserInterfaceManager _userInterfaceManager = default!;
 
         private AdminNameOverlay _adminNameOverlay = default!;
 
@@ -19,7 +22,7 @@ namespace Content.Client.Administration.Systems
 
         private void InitializeOverlay()
         {
-            _adminNameOverlay = new AdminNameOverlay(this, EntityManager, _eyeManager, _resourceCache, _entityLookup);
+            _adminNameOverlay = new AdminNameOverlay(this, EntityManager, _eyeManager, _resourceCache, _entityLookup, _userInterfaceManager);
             _adminManager.AdminStatusUpdated += OnAdminStatusUpdated;
         }