Fix dead mob sprites rotating on death (#16317)

Content.Client/Buckle/BuckleSystem.cs

@@ -70,7 +70,7 @@ internal sealed class BuckleSystem : SharedBuckleSystem
             !buckled ||
             args.Sprite == null)
         {
-            _rotationVisualizerSystem.SetHorizontalAngle(uid, RotationVisualsComponent.DefaultRotation, rotVisuals);
+            _rotationVisualizerSystem.SetHorizontalAngle(uid, rotVisuals.DefaultRotation, rotVisuals);
             return;
         }
 

Content.Client/Rotation/RotationVisualsComponent.cs

@@ -3,12 +3,16 @@ namespace Content.Client.Rotation;
 [RegisterComponent]
 public sealed class RotationVisualsComponent : Component
 {
-    public static readonly Angle DefaultRotation = Angle.FromDegrees(90);
+    [DataField("defaultRotation")]
+    [ViewVariables(VVAccess.ReadOnly)]
+    public readonly Angle DefaultRotation = Angle.FromDegrees(90);
 
     [ViewVariables(VVAccess.ReadWrite)]
     public Angle VerticalRotation = 0;
 
-    [ViewVariables(VVAccess.ReadWrite)] public Angle HorizontalRotation = DefaultRotation;
+    [DataField("horizontalRotation")]
+    [ViewVariables(VVAccess.ReadWrite)]
+    public Angle HorizontalRotation = Angle.FromDegrees(90);
 
     [ViewVariables(VVAccess.ReadWrite)]
     public float AnimationTime = 0.125f;

Resources/Prototypes/Entities/Mobs/NPCs/simplemob.yml

@@ -130,6 +130,8 @@
         Brute: 5
   - type: Appearance
   - type: RotationVisuals
+    defaultRotation: 0
+    horizontalRotation: 0
   - type: FireVisuals
     sprite: Mobs/Effects/onfire.rsi
     normalState: Generic_mob_burning