[UI] 스킬 퀵슬롯 UI 구현

- SkillSlotUI: 개별 슬롯 (아이콘, 쿨다운 오버레이, 텍스트)
- SkillQuickSlotUI: 6개 슬롯 관리 및 PlayerSkillInput 연동
- Animator 제어 문제 해결: 수동 SetActive로 쿨다운 표시
- UI_Bar에 PlayerHUD, StatBar 컴포넌트 추가

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Assets/Scripts/UI/SkillQuickSlotUI.cs

@@ -0,0 +1,142 @@
+using UnityEngine;
+using Colosseum.Player;
+using Colosseum.Skills;
+
+namespace Colosseum.UI
+{
+    /// <summary>
+    /// 스킬 퀵슬롯 UI 관리자.
+    /// PlayerSkillInput과 연동하여 쿨타임, 마나 등을 표시합니다.
+    /// </summary>
+    public class SkillQuickSlotUI : MonoBehaviour
+    {
+        [Header("Skill Slots")]
+        [Tooltip("6개의 스킬 슬롯 UI (인덱스 순서대로)")]
+        [SerializeField] private SkillSlotUI[] skillSlots = new SkillSlotUI[6];
+
+        [Header("Debug")]
+        [SerializeField] private bool debugMode = false;
+
+        [Header("Keybind Labels")]
+        [Tooltip("키바인딩 표시 텍스트 (기본: Q, W, E, R, A, S)")]
+        [SerializeField] private string[] keyLabels = { "Q", "W", "E", "R", "A", "S" };
+
+        private PlayerSkillInput playerSkillInput;
+        private PlayerNetworkController networkController;
+
+        private void Start()
+        {
+            // 로컬 플레이어 찾기
+            FindLocalPlayer();
+        }
+
+        private void FindLocalPlayer()
+        {
+            var players = FindObjectsByType<PlayerSkillInput>(FindObjectsSortMode.None);
+
+            if (players.Length == 0)
+            {
+                Debug.LogWarning("[SkillQuickSlotUI] No PlayerSkillInput found in scene");
+                return;
+            }
+
+            foreach (var player in players)
+            {
+                if (player.IsOwner)
+                {
+                    playerSkillInput = player;
+                    networkController = player.GetComponent<PlayerNetworkController>();
+                    Debug.Log($"[SkillQuickSlotUI] Found local player: {player.name}");
+                    InitializeSlots();
+                    return;
+                }
+            }
+
+            Debug.LogWarning("[SkillQuickSlotUI] No local player found (IsOwner = false)");
+        }
+
+        private void InitializeSlots()
+        {
+            if (playerSkillInput == null) return;
+
+            int initializedCount = 0;
+            for (int i = 0; i < skillSlots.Length && i < keyLabels.Length; i++)
+            {
+                SkillData skill = playerSkillInput.GetSkill(i);
+                string keyLabel = i < keyLabels.Length ? keyLabels[i] : (i + 1).ToString();
+
+                if (skillSlots[i] != null)
+                {
+                    skillSlots[i].Initialize(i, skill, keyLabel);
+                    if (skill != null) initializedCount++;
+                }
+                else
+                {
+                    Debug.LogWarning($"[SkillQuickSlotUI] Slot {i} is not assigned");
+                }
+            }
+
+            Debug.Log($"[SkillQuickSlotUI] Initialized {initializedCount} skill slots");
+        }
+
+        private void Update()
+        {
+            if (playerSkillInput == null)
+            {
+                // 플레이어가 아직 없으면 다시 찾기 시도
+                FindLocalPlayer();
+                return;
+            }
+
+            UpdateSlotStates();
+        }
+
+        private float debugLogTimer = 0f;
+
+        private void UpdateSlotStates()
+        {
+            bool shouldLog = debugMode && Time.time > debugLogTimer;
+            if (shouldLog) debugLogTimer = Time.time + 1f;
+
+            for (int i = 0; i < skillSlots.Length; i++)
+            {
+                if (skillSlots[i] == null) continue;
+
+                SkillData skill = playerSkillInput.GetSkill(i);
+                if (skill == null) continue;
+
+                float remainingCooldown = playerSkillInput.GetRemainingCooldown(i);
+                float totalCooldown = skill.Cooldown;
+                bool hasEnoughMana = networkController == null || networkController.Mana >= skill.ManaCost;
+
+                if (shouldLog && remainingCooldown > 0f)
+                {
+                    Debug.Log($"[SkillQuickSlotUI] Slot {i}: {skill.SkillName}, CD: {remainingCooldown:F1}/{totalCooldown:F1}");
+                }
+
+                skillSlots[i].UpdateState(remainingCooldown, totalCooldown, hasEnoughMana);
+            }
+        }
+
+        /// <summary>
+        /// 플레이어 참조 수동 설정 (씬 전환 등에서 사용)
+        /// </summary>
+        public void SetPlayer(PlayerSkillInput player)
+        {
+            playerSkillInput = player;
+            networkController = player?.GetComponent<PlayerNetworkController>();
+            InitializeSlots();
+        }
+
+        /// <summary>
+        /// 특정 슬롯의 스킬 변경
+        /// </summary>
+        public void UpdateSkillSlot(int slotIndex, SkillData skill)
+        {
+            if (slotIndex < 0 || slotIndex >= skillSlots.Length) return;
+
+            string keyLabel = slotIndex < keyLabels.Length ? keyLabels[slotIndex] : (slotIndex + 1).ToString();
+            skillSlots[slotIndex].Initialize(slotIndex, skill, keyLabel);
+        }
+    }
+}