Welder flame fix (#7021)

Content.Client/Tools/Visualizers/WelderVisualizerSystem.cs

@@ -0,0 +1,21 @@
+using Content.Client.Tools.Components;
+using Content.Shared.Tools.Components;
+using Robust.Client.GameObjects;
+
+namespace Content.Client.Tools.Visualizers;
+
+public sealed class WelderVisualizerSystem : VisualizerSystem<WelderComponent>
+{
+    protected override void OnAppearanceChange(EntityUid uid, WelderComponent component, ref AppearanceChangeEvent args)
+    {
+        base.OnAppearanceChange(uid, component, ref args);
+
+        if (!TryComp(uid, out SpriteComponent? sprite))
+            return;
+
+        if (args.Component.TryGetData(WelderVisuals.Lit, out bool isLit))
+        {
+            sprite.LayerSetVisible(WelderLayers.Flame, isLit);
+        }
+    }
+}