[Enemy] 적 기본 시스템 구현

Ultraworked with [Sisyphus](https://github.com/code-yeonggu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

Assets/Scripts/Enemy/EnemyBase.cs

@@ -0,0 +1,202 @@
+using System;
+using UnityEngine;
+using Unity.Netcode;
+using Colosseum.Stats;
+using Colosseum.Combat;
+
+namespace Colosseum.Enemy
+{
+    /// <summary>
+    /// 적 캐릭터 기본 클래스.
+    /// 네트워크 동기화, 스탯 관리, 대미지 처리를 담당합니다.
+    /// </summary>
+    public class EnemyBase : NetworkBehaviour, IDamageable
+    {
+        [Header("References")]
+        [Tooltip("CharacterStats 컴포넌트 (없으면 자동 검색)")]
+        [SerializeField] protected CharacterStats characterStats;
+        [Tooltip("Animator 컴포넌트")]
+        [SerializeField] protected Animator animator;
+        [Tooltip("NavMeshAgent 또는 이동 컴포넌트")]
+        [SerializeField] protected UnityEngine.AI.NavMeshAgent navMeshAgent;
+
+        [Header("Data")]
+        [SerializeField] protected EnemyData enemyData;
+
+        // 네트워크 동기화 변수
+        protected NetworkVariable<float> currentHealth = new NetworkVariable<float>(100f);
+        protected NetworkVariable<float> currentMana = new NetworkVariable<float>(50f);
+        protected NetworkVariable<bool> isDead = new NetworkVariable<bool>(false);
+
+        // 이벤트
+        public event Action<float, float> OnHealthChanged; // currentHealth, maxHealth
+        public event Action<float> OnDamageTaken; // damage
+        public event Action OnDeath;
+
+        // Properties
+        public float CurrentHealth => currentHealth.Value;
+        public float MaxHealth => characterStats != null ? characterStats.MaxHealth : 100f;
+        public float CurrentMana => currentMana.Value;
+        public float MaxMana => characterStats != null ? characterStats.MaxMana : 50f;
+        public bool IsDead => isDead.Value;
+        public CharacterStats Stats => characterStats;
+        public EnemyData Data => enemyData;
+        public Animator Animator => animator;
+
+        public override void OnNetworkSpawn()
+        {
+            // 컴포넌트 참조 확인
+            if (characterStats == null)
+                characterStats = GetComponent<CharacterStats>();
+            if (animator == null)
+                animator = GetComponentInChildren<Animator>();
+            if (navMeshAgent == null)
+                navMeshAgent = GetComponent<UnityEngine.AI.NavMeshAgent>();
+
+            // 서버에서 초기화
+            if (IsServer)
+            {
+                InitializeStats();
+            }
+
+            // 클라이언트에서 체력 변화 감지
+            currentHealth.OnValueChanged += OnHealthChangedInternal;
+        }
+
+        public override void OnNetworkDespawn()
+        {
+            currentHealth.OnValueChanged -= OnHealthChangedInternal;
+        }
+
+        /// <summary>
+        /// 스탯 초기화 (서버에서만 실행)
+        /// </summary>
+        protected virtual void InitializeStats()
+        {
+            if (enemyData != null && characterStats != null)
+            {
+                enemyData.ApplyBaseStats(characterStats);
+            }
+
+            // NavMeshAgent 속도 설정
+            if (navMeshAgent != null && enemyData != null)
+            {
+                navMeshAgent.speed = enemyData.MoveSpeed;
+                navMeshAgent.angularSpeed = enemyData.RotationSpeed;
+            }
+
+            currentHealth.Value = MaxHealth;
+            currentMana.Value = MaxMana;
+            isDead.Value = false;
+        }
+
+
+
+
+
+
+
+
+
+
+
+        /// <summary>
+        /// 대미지 적용 (서버에서 실행)
+        /// </summary>
+        public virtual float TakeDamage(float damage, object source = null)
+        {
+            if (!IsServer || isDead.Value)
+                return 0f;
+
+            float actualDamage = Mathf.Min(damage, currentHealth.Value);
+            currentHealth.Value = Mathf.Max(0f, currentHealth.Value - actualDamage);
+
+            OnDamageTaken?.Invoke(actualDamage);
+
+            // 대미지 피드백 (애니메이션, 이펙트 등)
+            OnTakeDamageFeedback(actualDamage, source);
+
+            if (currentHealth.Value <= 0f)
+            {
+                HandleDeath();
+            }
+
+            return actualDamage;
+        }
+
+        /// <summary>
+        /// 대미지 피드백 (애니메이션, 이펙트)
+        /// </summary>
+        protected virtual void OnTakeDamageFeedback(float damage, object source)
+        {
+            if (animator != null)
+            {
+                animator.SetTrigger("Hit");
+            }
+        }
+
+        /// <summary>
+        /// 체력 회복 (서버에서 실행)
+        /// </summary>
+        public virtual float Heal(float amount)
+        {
+            if (!IsServer || isDead.Value)
+                return 0f;
+
+            float oldHealth = currentHealth.Value;
+            currentHealth.Value = Mathf.Min(MaxHealth, currentHealth.Value + amount);
+            float actualHeal = currentHealth.Value - oldHealth;
+
+            return actualHeal;
+        }
+
+        /// <summary>
+        /// 사망 처리 (서버에서 실행)
+        /// </summary>
+        protected virtual void HandleDeath()
+        {
+            isDead.Value = true;
+
+            if (animator != null)
+            {
+                animator.SetTrigger("Die");
+            }
+
+            if (navMeshAgent != null)
+            {
+                navMeshAgent.isStopped = true;
+            }
+
+            OnDeath?.Invoke();
+
+            Debug.Log($"[Enemy] {name} died!");
+        }
+
+        /// <summary>
+        /// 리스폰
+        /// </summary>
+        public virtual void Respawn()
+        {
+            if (!IsServer) return;
+
+            isDead.Value = false;
+            InitializeStats();
+
+            if (navMeshAgent != null)
+            {
+                navMeshAgent.isStopped = false;
+            }
+
+            if (animator != null)
+            {
+                animator.Rebind();
+            }
+        }
+
+        // 체력 변화 이벤트 전파
+        private void OnHealthChangedInternal(float oldValue, float newValue)
+        {
+            OnHealthChanged?.Invoke(newValue, MaxHealth);
+        }
+    }
+}