[UI] 체력/마나 바 HUD 시스템 추가

- StatBar: Slider/Image.Fill 방식 지원
- PlayerHUD: PlayerNetworkController 연동
- TextMeshPro 어셈블리 참조 추가
- Fantasy Warrior HUD 애셋 임포트

Assets/Scripts/UI/PlayerHUD.cs

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+using UnityEngine;
+using Colosseum.Player;
+
+namespace Colosseum.UI
+{
+    /// <summary>
+    /// 플레이어 HUD - 체력/마나 바 관리
+    /// </summary>
+    public class PlayerHUD : MonoBehaviour
+    {
+        [Header("Stat Bars")]
+        [SerializeField] private StatBar healthBar;
+        [SerializeField] private StatBar manaBar;
+
+        [Header("Target")]
+        [Tooltip("자동으로 로컬 플레이어 찾기")]
+        [SerializeField] private bool autoFindPlayer = true;
+
+        private PlayerNetworkController targetPlayer;
+
+        private void Start()
+        {
+            if (autoFindPlayer)
+            {
+                FindLocalPlayer();
+            }
+        }
+
+        private void Update()
+        {
+            if (targetPlayer == null && autoFindPlayer)
+            {
+                FindLocalPlayer();
+            }
+
+            if (targetPlayer != null)
+            {
+                UpdateStatBars();
+            }
+        }
+
+        private void FindLocalPlayer()
+        {
+            var players = FindObjectsByType<PlayerNetworkController>(FindObjectsSortMode.None);
+            foreach (var player in players)
+            {
+                if (player.IsOwner)
+                {
+                    SetTarget(player);
+                    break;
+                }
+            }
+        }
+
+        /// <summary>
+        /// 추적할 플레이어 설정
+        /// </summary>
+        public void SetTarget(PlayerNetworkController player)
+        {
+            targetPlayer = player;
+        }
+
+        private void UpdateStatBars()
+        {
+            if (healthBar != null)
+            {
+                healthBar.SetValue(targetPlayer.Health, targetPlayer.MaxHealth);
+            }
+
+            if (manaBar != null)
+            {
+                manaBar.SetValue(targetPlayer.Mana, targetPlayer.MaxMana);
+            }
+        }
+    }
+}

Assets/Scripts/UI/PlayerHUD.cs.meta

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+fileFormatVersion: 2
+guid: e956d7232e6a45246ac4d8079f12f9c3

Assets/Scripts/UI/StatBar.cs

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+using UnityEngine;
+using UnityEngine.UI;
+using TMPro;
+
+namespace Colosseum.UI
+{
+    /// <summary>
+    /// 체력/마나 바 UI 컴포넌트
+    /// Slider 또는 Image.Fill 방식 지원
+    /// </summary>
+    public class StatBar : MonoBehaviour
+    {
+        [Header("References - Slider 방식")]
+        [SerializeField] private Slider slider;
+
+        [Header("References - Fill Image 방식")]
+        [SerializeField] private Image fillImage;
+
+        [Header("References - 텍스트")]
+        [SerializeField] private TMP_Text valueText;
+
+        [Header("Colors")]
+        [SerializeField] private Color fullColor = Color.green;
+        [SerializeField] private Color lowColor = Color.red;
+        [SerializeField] private float lowThreshold = 0.3f;
+        [SerializeField] private bool useColorTransition = true;
+
+        [Header("Animation")]
+        [SerializeField] private bool smoothTransition = true;
+        [SerializeField] private float lerpSpeed = 5f;
+
+        private float currentValue;
+        private float maxValue;
+        private float displayValue;
+
+        /// <summary>
+        /// 바 값 설정
+        /// </summary>
+        public void SetValue(float current, float max)
+        {
+            currentValue = current;
+            maxValue = max;
+
+            if (!smoothTransition)
+            {
+                displayValue = currentValue;
+                UpdateVisuals();
+            }
+        }
+
+        private void Update()
+        {
+            if (smoothTransition && !Mathf.Approximately(displayValue, currentValue))
+            {
+                displayValue = Mathf.Lerp(displayValue, currentValue, lerpSpeed * Time.deltaTime);
+
+                if (Mathf.Abs(displayValue - currentValue) < 0.01f)
+                    displayValue = currentValue;
+
+                UpdateVisuals();
+            }
+        }
+
+        private void UpdateVisuals()
+        {
+            if (maxValue <= 0f) return;
+
+            float ratio = Mathf.Clamp01(displayValue / maxValue);
+
+            // Slider 방식
+            if (slider != null)
+            {
+                slider.value = ratio;
+
+                // Slider 내부 Fill 이미지 색상 변경
+                if (useColorTransition && slider.fillRect != null)
+                {
+                    var fillImg = slider.fillRect.GetComponent<Image>();
+                    if (fillImg != null)
+                    {
+                        fillImg.color = ratio <= lowThreshold ? lowColor : fullColor;
+                    }
+                }
+            }
+            // Image.Fill 방식
+            else if (fillImage != null)
+            {
+                fillImage.fillAmount = ratio;
+
+                if (useColorTransition)
+                {
+                    fillImage.color = ratio <= lowThreshold ? lowColor : fullColor;
+                }
+            }
+
+            // 텍스트
+            if (valueText != null)
+            {
+                valueText.text = $"{Mathf.CeilToInt(displayValue)} / {Mathf.CeilToInt(maxValue)}";
+            }
+        }
+
+        private void OnValidate()
+        {
+            if (slider == null)
+                slider = GetComponentInChildren<Slider>();
+            if (fillImage == null && slider == null)
+                fillImage = GetComponentInChildren<Image>();
+        }
+    }
+}

Assets/Scripts/UI/StatBar.cs.meta

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+fileFormatVersion: 2
+guid: b5c5d0fa667f83d4399abb45ffcaea31