```

docs(clipboard): 添加剪贴板功能相关图片资源

添加了两个剪贴板功能的截图文件，用于文档说明和功能展示。
```

Assets/Script/ManaSystem.cs

@@ -0,0 +1,93 @@
+using UnityEngine;
+using UnityEngine.UI;
+
+public class ManaSystem : MonoBehaviour
+{
+    public static ManaSystem Instance { get; private set; }
+
+    [Header("能量配置")]
+    [Min(1)]
+    public int maxMana = 10;
+
+    [Min(0f)]
+    public float manaRegenRate = 1f;
+
+    [Header("UI 引用")]
+    public Image[] manaBeads;
+
+    private float currentMana;
+    private float manaRegenTimer;
+
+    public float CurrentMana => currentMana;
+    public int CurrentManaInt => Mathf.FloorToInt(currentMana);
+
+    private void Awake()
+    {
+        if (Instance != null && Instance != this)
+        {
+            Destroy(gameObject);
+            return;
+        }
+        Instance = this;
+    }
+
+    private void Start()
+    {
+        currentMana = maxMana;
+        UpdateManaUI();
+    }
+
+    private void Update()
+    {
+        if (currentMana < maxMana)
+        {
+            manaRegenTimer += Time.deltaTime;
+            if (manaRegenTimer >= manaRegenRate)
+            {
+                manaRegenTimer = 0f;
+                currentMana = Mathf.Min(currentMana + 1f, maxMana);
+                UpdateManaUI();
+            }
+        }
+    }
+
+    public bool TryConsumeMana(int cost)
+    {
+        if (CurrentManaInt < cost)
+        {
+            return false;
+        }
+
+        currentMana -= cost;
+        if (currentMana < 0f)
+        {
+            currentMana = 0f;
+        }
+
+        UpdateManaUI();
+        return true;
+    }
+
+    public void AddMana(int amount)
+    {
+        currentMana = Mathf.Min(currentMana + amount, maxMana);
+        UpdateManaUI();
+    }
+
+    private void UpdateManaUI()
+    {
+        if (manaBeads == null || manaBeads.Length == 0)
+        {
+            return;
+        }
+
+        int fullBeads = CurrentManaInt;
+        for (int i = 0; i < manaBeads.Length; i++)
+        {
+            if (manaBeads[i] != null)
+            {
+                manaBeads[i].enabled = i < fullBeads;
+            }
+        }
+    }
+}