Explosion refactor TEST MERG (#6995)

* Explosions

* fix yaml typo

and prevent silly UI inputs

* oop

Co-authored-by: ElectroJr <leonsfriedrich@gmail.com>

Content.Server/Administration/UI/SpawnExplosionEui.cs

@@ -0,0 +1,39 @@
+using Content.Server.EUI;
+using Content.Server.Explosion.EntitySystems;
+using Content.Shared.Administration;
+using Content.Shared.Eui;
+using JetBrains.Annotations;
+
+namespace Content.Server.Administration.UI;
+
+/// <summary>
+///     Admin Eui for spawning and preview-ing explosions
+/// </summary>
+[UsedImplicitly]
+public sealed class SpawnExplosionEui : BaseEui
+{
+    public override void HandleMessage(EuiMessageBase msg)
+    {
+        if (msg is SpawnExplosionEuiMsg.Close)
+        {
+            Close();
+            return;
+        }
+
+        if (msg is not SpawnExplosionEuiMsg.PreviewRequest request)
+            return;
+
+        if (request.TotalIntensity <= 0 || request.IntensitySlope <= 0)
+            return;
+
+        var explosion = EntitySystem.Get<ExplosionSystem>().GenerateExplosionPreview(request);
+
+        if (explosion == null)
+        {
+            Logger.Error("Failed to generate explosion preview.");
+            return;
+        }
+
+        SendMessage(new SpawnExplosionEuiMsg.PreviewData(explosion, request.IntensitySlope, request.TotalIntensity));
+    }
+}