Fix no kill button for NNKs

Roles/Neutral/FFF.cs

@@ -64,6 +64,11 @@ namespace TOHE.Roles.Neutral
         public override bool IsEnable => On;
         public override bool CanUseImpostorVentButton(PlayerControl pc) => false;
 
+        public override bool CanUseKillButton(PlayerControl pc)
+        {
+            return pc.IsAlive() && !isWon;
+        }
+
         public override void ApplyGameOptions(IGameOptions opt, byte playerId)
         {
             opt.SetVision(true);

Roles/Neutral/Maverick.cs

@@ -50,11 +50,8 @@ public class Maverick : RoleBase
     public override void SetKillCooldown(byte id) => Main.AllPlayerKillCooldown[id] = KillCooldown.GetFloat();
     public override void ApplyGameOptions(IGameOptions opt, byte id) => opt.SetVision(HasImpostorVision.GetBool());
     public override bool CanUseImpostorVentButton(PlayerControl pc) => CanVent.GetBool();
-
-    public override bool CanUseSabotage(PlayerControl pc)
-    {
-        return false;
-    }
+    public override bool CanUseKillButton(PlayerControl pc) => pc.IsAlive();
+    public override bool CanUseSabotage(PlayerControl pc) => false;
 
     public override string GetProgressText(byte playerId, bool comms)
     {

Roles/Neutral/Romantic.cs

@@ -171,6 +171,7 @@ public class Romantic : RoleBase
 
     public override void OnReportDeadBody() => IsPartnerProtected = false;
     public override bool CanUseImpostorVentButton(PlayerControl pc) => false;
+    public override bool CanUseKillButton(PlayerControl pc) => pc.IsAlive();
 
     public static void ChangeRole()
     {