```

feat(buildings): 添加金矿建筑功能并优化建筑健康系统

- 为兵营和金矿添加伤害数字显示功能，包括持续时间、上升高度等参数
- 将金矿脚本重构为GoldMine组件，实现定时产出金币机制
- 为所有单位添加NavMeshAgent组件以支持导航寻路
- 为弓箭手、法师等单位添加分离半径和目标扩散参数
- 为建筑添加碰撞体和标签设置
- 修复当前能量字段命名规范（currentEnergy -> _currentEnergy）
- 调整金矿健康值从100提升至500
- 统一伤害数字显示相关属性配置
```

Assets/Script/GoldMine.cs

@@ -1,36 +1,78 @@
 using UnityEngine;
 
+/// <summary>
+/// 金矿建筑，定时产出金币
+/// </summary>
 public class GoldMine : MonoBehaviour
 {
-    [Header("产出配置")]
-    [Min(0)] public int goldPerTick = 5;
-    [Min(0.1f)] public float productionInterval = 3f;
+    [Header("金币产出")]
+    [Tooltip("每次产出的金币数量")]
+    [SerializeField] private int goldPerProduction = 50;
 
-    private float timer;
-    private BuildingHealth buildingHealth;
+    [Tooltip("产出间隔（秒）")]
+    [SerializeField] private float productionInterval = 5f;
+
+    [Header("可选：血条和进度条")]
+    [SerializeField] private WorldHealthBar healthBar;
+
+    private float productionTimer = 0f;
 
     private void Awake()
     {
-        buildingHealth = GetComponent<BuildingHealth>();
+        // 如果没有手动指定，尝试自动获取
+        if (healthBar == null)
+        {
+            healthBar = GetComponent<WorldHealthBar>();
+        }
+    }
+
+    private void Start()
+    {
+        // 初始化进度条（使用能量条显示产出进度）
+        if (healthBar != null)
+        {
+            healthBar.maxEnergy = 100f;
+            healthBar.currentEnergy = 0f;
+        }
     }
 
     private void Update()
     {
-        if (GoldSystem.Instance == null)
+        if (GoldManager.Instance == null) return;
+
+        productionTimer += Time.deltaTime;
+
+        // 更新进度条
+        if (healthBar != null)
         {
-            return;
+            float progress = Mathf.Clamp01(productionTimer / productionInterval);
+            healthBar.currentEnergy = progress * 100f;
         }
 
-        timer += Time.deltaTime;
-        if (buildingHealth != null)
+        // 达到产出时间
+        if (productionTimer >= productionInterval)
         {
-            buildingHealth.SetProductionProgress(timer / productionInterval);
-        }
-
-        while (timer >= productionInterval)
-        {
-            timer -= productionInterval;
-            GoldSystem.Instance.AddGold(goldPerTick);
+            ProduceGold();
+            productionTimer = 0f;
         }
     }
+
+    private void ProduceGold()
+    {
+        if (GoldManager.Instance != null)
+        {
+            GoldManager.Instance.AddGold(goldPerProduction);
+            Debug.Log($"{gameObject.name} 产出金币 +{goldPerProduction}");
+
+            // 可以在这里播放特效和音效
+            // TODO: 添加金币产出特效
+        }
+    }
+
+    // 在编辑器中显示信息
+    private void OnDrawGizmosSelected()
+    {
+        Gizmos.color = Color.yellow;
+        Gizmos.DrawWireSphere(transform.position + Vector3.up * 2f, 0.5f);
+    }
 }