feat(combat): Phase L.1c add outbound combat actions

src/AcDream.Core.Net/WorldSession.cs

@@ -1,6 +1,7 @@
 using System.Buffers.Binary;
 using System.Net;
 using System.Threading.Channels;
+using AcDream.Core.Combat;
 using AcDream.Core.Net.Cryptography;
 using AcDream.Core.Net.Messages;
 using AcDream.Core.Net.Packets;
@@ -909,6 +910,48 @@ public sealed class WorldSession : IDisposable
         SendGameAction(body);
     }
 
+    /// <summary>Send retail ChangeCombatMode (0x0053).</summary>
+    public void SendChangeCombatMode(CombatMode mode)
+    {
+        uint seq = NextGameActionSequence();
+        byte[] body = CharacterActions.BuildChangeCombatMode(
+            seq,
+            (CharacterActions.CombatMode)(uint)mode);
+        SendGameAction(body);
+    }
+
+    /// <summary>Send retail TargetedMeleeAttack (0x0008).</summary>
+    public void SendMeleeAttack(uint targetGuid, AttackHeight attackHeight, float powerLevel)
+    {
+        uint seq = NextGameActionSequence();
+        byte[] body = AttackTargetRequest.BuildMelee(
+            seq,
+            targetGuid,
+            (uint)attackHeight,
+            powerLevel);
+        SendGameAction(body);
+    }
+
+    /// <summary>Send retail TargetedMissileAttack (0x000A).</summary>
+    public void SendMissileAttack(uint targetGuid, AttackHeight attackHeight, float accuracyLevel)
+    {
+        uint seq = NextGameActionSequence();
+        byte[] body = AttackTargetRequest.BuildMissile(
+            seq,
+            targetGuid,
+            (uint)attackHeight,
+            accuracyLevel);
+        SendGameAction(body);
+    }
+
+    /// <summary>Send retail CancelAttack (0x01B7).</summary>
+    public void SendCancelAttack()
+    {
+        uint seq = NextGameActionSequence();
+        byte[] body = AttackTargetRequest.BuildCancel(seq);
+        SendGameAction(body);
+    }
+
     /// <summary>
     /// Phase I.6: send a TurbineChat <c>RequestSendToRoomById</c> to a
     /// global community room (General / Trade / LFG / Roleplay /

src/AcDream.Core/Combat/CombatModel.cs

@@ -7,14 +7,17 @@ namespace AcDream.Core.Combat;
 // Full research: docs/research/deepdives/r02-combat-system.md
 // ─────────────────────────────────────────────────────────────────────
 
+[Flags]
 public enum CombatMode
 {
     Undef     = 0,
-    NonCombat = 1,
-    Melee     = 2,
-    Missile   = 3,
-    Magic     = 4,
-    Peaceful  = 5,
+    NonCombat = 0x01,
+    Melee     = 0x02,
+    Missile   = 0x04,
+    Magic     = 0x08,
+
+    ValidCombat  = NonCombat | Melee | Missile | Magic,
+    CombatCombat = Melee | Missile | Magic,
 }
 
 public enum AttackHeight

src/AcDream.Core/Combat/CombatState.cs

@@ -39,6 +39,8 @@ public sealed class CombatState
 {
     private readonly ConcurrentDictionary<uint, float> _healthByGuid = new();
 
+    public CombatMode CurrentMode { get; private set; } = CombatMode.NonCombat;
+
     /// <summary>Fires when a target's health percent changes (from UpdateHealth).</summary>
     public event Action<uint /*guid*/, float /*percent*/>? HealthChanged;
 
@@ -60,6 +62,9 @@ public sealed class CombatState
     /// <summary>The server accepted the attack and the power bar/animation can begin.</summary>
     public event Action? AttackCommenced;
 
+    /// <summary>The locally requested or server-confirmed combat mode changed.</summary>
+    public event Action<CombatMode>? CombatModeChanged;
+
     /// <summary>
     /// Fires when the server confirms the player landed a killing blow
     /// (GameEvent <c>KillerNotification (0x01AD)</c>). Event payload is
@@ -97,6 +102,15 @@ public sealed class CombatState
         HealthChanged?.Invoke(targetGuid, healthPercent);
     }
 
+    public void SetCombatMode(CombatMode mode)
+    {
+        if (CurrentMode == mode)
+            return;
+
+        CurrentMode = mode;
+        CombatModeChanged?.Invoke(mode);
+    }
+
     public void OnVictimNotification(
         string attackerName, uint attackerGuid, uint damageType, uint damage,
         uint hitQuadrant, uint critical, uint attackType)