feat: Implement DownDash ability and related systems

- Added DownDash ability with cooldown and speed configuration.
- Introduced DownDashState to handle down dashing mechanics, including gravity manipulation and animation playback.
- Updated PlayerMovement to support DownDash functionality.
- Enhanced PlayerStats to manage spring charge consumption and healing.
- Modified PlayerCombat and WeaponHitBoxInstance to support new hit confirmation events.
- Updated AbilityType to include new form types for character abilities.
- Improved Gizmos for better visualization of enemy detection and attack ranges.
- Added feedback systems for form switching in PlayerFeedback and IFeedbackPlayer.
- Refactored combat and movement states to accommodate new abilities and ensure smooth transitions.

Assets/_Game/Scripts/Player/FormController.cs

@@ -3,6 +3,7 @@ using UnityEngine;
 using BaseGames.Core;
 using BaseGames.Core.Save;
 using BaseGames.Core.Events;
+using BaseGames.Feedback;
 using BaseGames.Input;
 
 namespace BaseGames.Player
@@ -21,6 +22,9 @@ namespace BaseGames.Player
         [SerializeField] private FormConfigSO _config;
         [SerializeField] private InputReaderSO _input;
 
+        [Header("依赖")]
+        [SerializeField] private PlayerStats _stats;
+
         [Header("事件频道")]
         [SerializeField] private IntEventChannelSO  _onFormChanged;     // 广播当前形态索引（UI/Save）
         [SerializeField] private VoidEventChannelSO _onSkillSetChanged; // 通知 SkillHUD 刷新
@@ -29,12 +33,21 @@ namespace BaseGames.Player
         public FormSO   CurrentForm { get; private set; }
         public FormSO[] AllForms    => _config.forms;
 
+        /// <summary>当前切换 CD 剩余时间（秒），0 表示可切换。</summary>
+        public float SwitchCooldownRemaining => _switchCooldownTimer;
+
         /// <summary>C# 事件，WeaponManager 在 OnEnable 自订阅（架构 05 §6）。</summary>
         public event Action OnFormChanged;
 
+        private float _switchCooldownTimer;
+        private IFeedbackPlayer _feedback;
+
         private void Awake()
         {
             Debug.Assert(_config != null, "[FormController] _config 未赋值，请在 Inspector 中指定 FormConfigSO。", this);
+            if (_stats == null)
+                _stats = GetComponent<PlayerStats>();
+            _feedback = GetComponentInChildren<IFeedbackPlayer>() ?? NullFeedbackPlayer.Instance;
         }
 
         private void OnEnable()
@@ -61,16 +74,43 @@ namespace BaseGames.Player
                 CurrentForm = _config.forms[0];
         }
 
+        private void Update()
+        {
+            if (_switchCooldownTimer > 0f)
+                _switchCooldownTimer -= Time.deltaTime;
+        }
+
         // ── 公共 API ────────────────────────────────────────────────────────────
 
-        /// <summary>切换到指定形态类型。若已在目标形态则不操作。</summary>
+        /// <summary>切换到指定形态类型。若已在目标形态、尚未解锁或 CD 未结束则不操作。</summary>
         public void SwitchForm(FormType newFormType)
         {
+            // CD 检查
+            if (_switchCooldownTimer > 0f) return;
+
+            // 检查对应形态的解锁标志
+            AbilityType required = newFormType switch
+            {
+                FormType.TianHun  => AbilityType.FormTianHun,
+                FormType.DiHun    => AbilityType.FormDiHun,
+                FormType.MingHun  => AbilityType.FormMingHun,
+                _                 => AbilityType.None,
+            };
+            if (required != AbilityType.None && _stats != null && !_stats.HasAbility(required))
+                return;
+
             FormSO newForm = _config.GetFormByType(newFormType);
             if (newForm == null || newForm == CurrentForm) return;
 
             CurrentForm = newForm;
 
+            // 启动切换 CD
+            if (_config.SwitchCooldown > 0f)
+                _switchCooldownTimer = _config.SwitchCooldown;
+
+            // 播放对应形态切换反馈
+            _feedback.PlayFormSwitch((int)newFormType);
+
             // 1. SO 事件广播索引（UI/Save）
             _onFormChanged?.Raise(_config.GetFormIndex(newForm));