Make the station start with random broken wiring (#26695)

Random wire cutting on round start

Content.Server/Wires/CutWireOnMapInitSystem.cs

@@ -0,0 +1,34 @@
+using Robust.Shared.Random;
+
+namespace Content.Server.Wires;
+
+/// <summary>
+/// Handles cutting a random wire on devices that have <see cref="CutWireOnMapInitComponent"/>.
+/// </summary>
+public sealed partial class CutWireOnMapInitSystem : EntitySystem
+{
+    [Dependency] private readonly IRobustRandom _random = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<CutWireOnMapInitComponent, MapInitEvent>(OnMapInit, after: [typeof(WiresSystem)]);
+    }
+
+    private void OnMapInit(Entity<CutWireOnMapInitComponent> entity, ref MapInitEvent args)
+    {
+        if (TryComp<WiresComponent>(entity, out var panel) && panel.WiresList.Count > 0)
+        {
+            // Pick a random wire
+            var targetWire = _random.Pick(panel.WiresList);
+
+            // Cut the wire
+            if (targetWire.Action == null || targetWire.Action.Cut(EntityUid.Invalid, targetWire))
+                targetWire.IsCut = true;
+        }
+
+        // Our work here is done
+        RemCompDeferred(entity, entity.Comp);
+    }
+}