fix(net): Phase L.1c conform combat wire events

src/AcDream.Core.Net/Messages/CharacterActions.cs

@@ -22,9 +22,17 @@ public static class CharacterActions
     public const uint TrainSkillOpcode     = 0x0047u;  // u32 skillId, u32 credits
     public const uint ChangeCombatModeOpcode = 0x0053u; // u32 combatMode
 
+    [Flags]
     public enum CombatMode : uint
     {
-        Undef = 0, NonCombat = 1, Melee = 2, Missile = 3, Magic = 4, Peaceful = 5,
+        Undef = 0,
+        NonCombat = 0x01,
+        Melee = 0x02,
+        Missile = 0x04,
+        Magic = 0x08,
+
+        ValidCombat = NonCombat | Melee | Missile | Magic,
+        CombatCombat = Melee | Missile | Magic,
     }
 
     /// <summary>Spend XP to raise an attribute (Strength, Endurance, etc).</summary>