```

feat(UnitBase): 添加单位分散机制和目标选择偏移

- 新增阵型分散参数：separationRadius、separationWeight、targetSpreadBias
- 实现ComputeSeparation方法计算友军分离力，避免单位扎堆
- 添加确定性分散偏移，让不同单位偏好不同目标，避免全部涌向同一敌人
- 在移动逻辑中集成分离向量计算

feat(WorldHealthBar): 实现伤害数字显示系统

- 添加伤害数字相关配置参数：showDamageNumbers、damageNumberDuration等
- 实现TakeDamage和Heal方法中的伤害数字生成逻辑
- 创建DamageNumber组件处理数字的上升、缩放、淡出动画
- 实现白字黑边效果，使用TextMesh副本组合方式实现描边

refactor(CoreBattleTest): 更新AI巡逻和检测参数

- 将clickStopDistance替换为patrolStopDistance、patrolPause、patrolRadius
- 添加leashRadius和friendlyBuildingTag参数
- 为攻击单位增加detectRange检测范围参数

chore(dependencies): 更新包管理依赖配置

- 添加TJGenerators和CodelyBridge包引用
- 调整包依赖顺序，保持XR模块引用

docs(CODELY): 更新开发日志记录

- 添加建筑系统核心脚本实现说明
- 记录NavMesh烘焙问题及解决方案
- 详细说明伤害数字系统的实现要点和技术难点
```

Assets/Script/UnitBase.cs

@@ -67,6 +67,13 @@ public class UnitBase : MonoBehaviour
     [Min(0f)]
     public float energyPerAttack = 20f;
 
+    [Header("阵型分散")]
+    [Min(0f)] public float separationRadius = 1.5f;
+    [Min(0f)] public float separationWeight = 3f;
+    [Min(0f)] public float targetSpreadBias = 6f;
+
+    private static Collider[] s_separationBuffer = new Collider[30];
+
     //角色状态
     private State state = State.Alert;
 
@@ -305,9 +312,12 @@ public class UnitBase : MonoBehaviour
             }
 
             float sqrDistance = (opponent.transform.position - transform.position).sqrMagnitude;
-            if (sqrDistance < nearestSqrDistance)
+            //加入确定性分散偏移：让不同单位偏好不同目标，避免全部涌向同一个敌人
+            float bias = ((uint)(gameObject.GetInstanceID() * 7919) ^ (uint)(opponent.GetInstanceID())) % 10u / 10f * targetSpreadBias;
+            float adjustedSqrDistance = sqrDistance + bias;
+            if (adjustedSqrDistance < nearestSqrDistance)
             {
-                nearestSqrDistance = sqrDistance;
+                nearestSqrDistance = adjustedSqrDistance;
                 nearestOpponent = opponent;
             }
         }
@@ -882,6 +892,15 @@ public class UnitBase : MonoBehaviour
     void move(Vector3 movement)
     {
         movement.y = 0;
+
+        //友军分离力：与过近的同阵营单位互相推开，避免扎堆
+        Vector3 separation = ComputeSeparation();
+        if (separation.sqrMagnitude > 0.0001f)
+        {
+            movement += separation * separationWeight;
+            movement.y = 0;
+        }
+
         if (movement == Vector3.zero)
         {
             animator.SetInteger("speed", 0);
@@ -900,6 +919,43 @@ public class UnitBase : MonoBehaviour
         transform.rotation = Quaternion.Euler(0f, movementRotation.eulerAngles.y, 0f);
     }
 
+    //计算与附近同阵营单位的分离向量；越近推力越大。
+    private Vector3 ComputeSeparation()
+    {
+        if (separationRadius <= 0f)
+        {
+            return Vector3.zero;
+        }
+
+        int hitCount = Physics.OverlapSphereNonAlloc(transform.position, separationRadius, s_separationBuffer);
+        Vector3 separation = Vector3.zero;
+
+        for (int i = 0; i < hitCount; i++)
+        {
+            Collider other = s_separationBuffer[i];
+            if (other == null || other.gameObject == gameObject)
+            {
+                continue;
+            }
+
+            //只推开同阵营单位，敌人间的碰撞由CharacterController自然阻挡
+            if (!other.CompareTag(gameObject.tag))
+            {
+                continue;
+            }
+
+            Vector3 diff = transform.position - other.transform.position;
+            diff.y = 0f;
+            float distance = diff.magnitude;
+            if (distance > 0.01f && distance < separationRadius)
+            {
+                separation += diff / distance * (separationRadius - distance);
+            }
+        }
+
+        return separation;
+    }
+
 
     private float getVerticalVelocity()
     {