Content update for UI prediction (#27214)

* Content update for UI refactor

* Big update

* Sharing

* Remaining content updates

* First big update

* Prototype updates

* AUGH

* Fix UI comp ref

* Cleanup

- Fix predicted message, fix item slots, fix interaction range check.

* Fix regressions

* Make this predictive

idk why it wasn't.

* Fix slime merge

* Merge conflict

* Fix merge

Content.Server/Humanoid/Systems/HumanoidAppearanceSystem.Modifier.cs

@@ -32,8 +32,8 @@ public sealed partial class HumanoidAppearanceSystem
             Icon = new SpriteSpecifier.Rsi(new("/Textures/Mobs/Customization/reptilian_parts.rsi"), "tail_smooth"),
             Act = () =>
             {
-                _uiSystem.TryOpen(uid, HumanoidMarkingModifierKey.Key, actor.PlayerSession);
-                _uiSystem.TrySetUiState(
+                _uiSystem.OpenUi(uid, HumanoidMarkingModifierKey.Key, actor.PlayerSession);
+                _uiSystem.SetUiState(
                     uid,
                     HumanoidMarkingModifierKey.Key,
                     new HumanoidMarkingModifierState(component.MarkingSet, component.Species,
@@ -48,8 +48,7 @@ public sealed partial class HumanoidAppearanceSystem
     private void OnBaseLayersSet(EntityUid uid, HumanoidAppearanceComponent component,
         HumanoidMarkingModifierBaseLayersSetMessage message)
     {
-        if (message.Session is not { } player
-            || !_adminManager.HasAdminFlag(player, AdminFlags.Fun))
+        if (!_adminManager.HasAdminFlag(message.Actor, AdminFlags.Fun))
         {
             return;
         }
@@ -67,7 +66,7 @@ public sealed partial class HumanoidAppearanceSystem
 
         if (message.ResendState)
         {
-            _uiSystem.TrySetUiState(
+            _uiSystem.SetUiState(
                 uid,
                 HumanoidMarkingModifierKey.Key,
                 new HumanoidMarkingModifierState(component.MarkingSet, component.Species,
@@ -81,8 +80,7 @@ public sealed partial class HumanoidAppearanceSystem
     private void OnMarkingsSet(EntityUid uid, HumanoidAppearanceComponent component,
         HumanoidMarkingModifierMarkingSetMessage message)
     {
-        if (message.Session is not { } player
-            || !_adminManager.HasAdminFlag(player, AdminFlags.Fun))
+        if (!_adminManager.HasAdminFlag(message.Actor, AdminFlags.Fun))
         {
             return;
         }
@@ -92,7 +90,7 @@ public sealed partial class HumanoidAppearanceSystem
 
         if (message.ResendState)
         {
-            _uiSystem.TrySetUiState(
+            _uiSystem.SetUiState(
                 uid,
                 HumanoidMarkingModifierKey.Key,
                 new HumanoidMarkingModifierState(component.MarkingSet, component.Species,