draft options working; spells won't cast though

Assets/_Project/Scripts/Gameplay/BuilderSpells/SlowAreaSpellDefinition.cs

@@ -0,0 +1,55 @@
+// Assets/_Project/Scripts/Gameplay/BuilderSpells/SlowAreaSpellDefinition.cs
+using UnityEngine;
+using TD.Core;
+
+namespace TD.Gameplay.BuilderSpells
+{
+    /// <summary>
+    /// Builder spell #2 — slow every enemy within an area for a duration.
+    /// </summary>
+    /// <remarks>
+    /// <see cref="BuilderSpellDefinition.TargetType"/> is <see cref="SpellTargetType.AreaOfEffect"/>
+    /// — the cast controller previews <see cref="BuilderSpellDefinition.Radius"/> as a decal
+    /// while aiming, and this spell resolves against that same radius (no separate field).
+    /// Reuses the existing slow/DoT system (<see cref="EnemyStatus.ApplyEffect"/>) rather than
+    /// introducing a new status mechanism.
+    /// </remarks>
+    [CreateAssetMenu(fileName = "SlowAreaSpell", menuName = "TD/Builder Spells/Slow Area")]
+    public class SlowAreaSpellDefinition : BuilderSpellDefinition
+    {
+        public override BuilderSpellKind Kind => BuilderSpellKind.SlowArea;
+
+        [Header("Slow Area")]
+        [Tooltip("Speed multiplier applied to affected enemies for EffectDuration " +
+                 "(e.g. 0.5 = half speed).")]
+        [Range(0f, 1f)]
+        public float SlowFactor = 0.5f;
+
+        [Tooltip("Seconds the slow lasts. Re-casting on an already-slowed enemy refreshes it.")]
+        [Min(0f)]
+        public float EffectDuration = 3f;
+
+        public override bool ServerCast(ulong clientId, Vector3 targetPoint)
+        {
+            PlayerSlot owner = PlayerMatchState.SlotForClient(clientId);
+
+            int count = Physics.OverlapSphereNonAlloc(
+                targetPoint, Mathf.Max(Radius, 0.01f), s_overlapBuffer, enemyLayerMask);
+
+            bool hitAny = false;
+            for (int i = 0; i < count; i++)
+            {
+                var enemyHealth = s_overlapBuffer[i].GetComponent<EnemyHealth>();
+                if (enemyHealth == null || enemyHealth.IsDead) continue;
+
+                var enemyStatus = s_overlapBuffer[i].GetComponent<EnemyStatus>();
+                if (enemyStatus == null) continue;
+
+                enemyStatus.ApplyEffect(DamageType.Cold, SlowFactor, EffectDuration, owner);
+                hitAny = true;
+            }
+
+            return hitAny;
+        }
+    }
+}