feat(combat): port retail basic combat bar

Mount authored gmCombatUI, share one press/hold/release request state machine across DAT buttons and keybindings, and recover the exact 1.0s/0.8s power timing from matching retail x86. The same timer fixes jump charge, while ready-stance, response queueing, auto-repeat, layout binding, migration, and conformance coverage keep behavior architectural rather than panel-local.

Co-Authored-By: Codex <codex@openai.com>

src/AcDream.Core/Combat/CombatModel.cs

@@ -50,6 +50,38 @@ public enum CombatAttackAction
 /// </summary>
 public static class CombatInputPlanner
 {
+    /// <summary>
+    /// Retail MotionStance_DualWieldCombat. GetPowerBarLevel (0x0056ADE0)
+    /// selects the faster 0.8-second charge when this is the current style.
+    /// </summary>
+    public const uint DualWieldCombatStyle = 0x80000046u;
+    public const uint ReadyForwardCommand = 0x41000003u;
+    public const double AttackPowerUpSeconds = 1.0;
+    public const double DualWieldPowerUpSeconds = 0.8;
+
+    /// <summary>
+    /// Attack-time branch of retail <c>PlayerInReadyPosition</c>
+    /// (0x0056B820, arg2=true). Melee accepts a valid maneuver table;
+    /// every player has one, while missile additionally requires one of
+    /// retail's launcher/thrown styles to be at Ready.
+    /// </summary>
+    public static bool PlayerInReadyPositionForAttack(
+        CombatMode mode,
+        uint currentStyle,
+        uint forwardCommand)
+    {
+        if (mode == CombatMode.Melee)
+            return true;
+        if (mode != CombatMode.Missile || forwardCommand != ReadyForwardCommand)
+            return false;
+        return currentStyle is 0x8000003Fu
+            or 0x80000041u
+            or 0x80000043u
+            or 0x80000047u
+            or 0x80000138u
+            or 0x80000139u;
+    }
+
     private const EquipMask PrimaryWeaponLocations =
         EquipMask.MeleeWeapon | EquipMask.MissileWeapon | EquipMask.TwoHanded;