```

chore(plastic): 更新 Plastic SCM 配置文件

更新了 .plastic/plastic.changes 和 .plastic/plastic.wktree
二进制配置文件以同步工作区状态。
```

Assets/Script/WorldHealthBar.cs

@@ -21,6 +21,12 @@ public class WorldHealthBar : MonoBehaviour
     // 血条内部填充颜色。
     public Color fillColor = new Color(0.1f, 0.8f, 0.18f, 1f);
 
+    // 死亡特效持续时间，单位为秒。
+    [Min(0.1f)] public float deathEffectDuration = 1.1f;
+
+    // 死亡时使用的浅蓝色粒子颜色。
+    public Color deathEffectColor = new Color(0.55f, 0.9f, 1f, 1f);
+
     // 血条 UI 的像素尺寸，实际显示大小由 worldWidth 控制。
     private const int PixelWidth = 100;
     private const int PixelHeight = 14;
@@ -43,6 +49,9 @@ public class WorldHealthBar : MonoBehaviour
     // 所有血条共用的圆角 Sprite。
     private static Sprite roundedSprite;
 
+    // 防止死亡逻辑重复执行。
+    private bool isDead;
+
     // 初始化血量和血条 UI。
     private void Awake()
     {
@@ -99,8 +108,14 @@ public class WorldHealthBar : MonoBehaviour
     // 直接设置当前生命值，并刷新绿色填充比例。
     public void SetHealth(float value)
     {
+        if (isDead) return;
+
         currentHealth = Mathf.Clamp(value, 0f, maxHealth);
         UpdateFill();
+        if (currentHealth <= 0f)
+        {
+            Die();
+        }
     }
 
     // 让单位受到伤害。
@@ -109,6 +124,128 @@ public class WorldHealthBar : MonoBehaviour
     // 让单位恢复生命值。
     public void Heal(float amount) => SetHealth(currentHealth + amount);
 
+    // 处理单位死亡：隐藏模型和血条，播放蓝色向上爆散特效。
+    private void Die()
+    {
+        isDead = true;
+        currentHealth = 0f;
+        UpdateFill();
+
+        foreach (Renderer renderer in GetComponentsInChildren<Renderer>())
+        {
+            renderer.enabled = false;
+        }
+
+        // 立即从敌我扫描中移除，避免死亡等待期间继续被攻击。
+        gameObject.SetActive(false);
+
+        if (barRect != null)
+        {
+            barRect.gameObject.SetActive(false);
+        }
+
+        GameObject effect = CreateDeathEffect();
+        Destroy(effect, deathEffectDuration);
+        Destroy(gameObject, deathEffectDuration);
+    }
+
+    // 创建蓝色粒子爆散特效。
+    private GameObject CreateDeathEffect()
+    {
+        GameObject effect = new GameObject("DeathEffect");
+        effect.transform.position = transform.position + Vector3.up * 1.35f;
+
+        ParticleSystem particles = effect.AddComponent<ParticleSystem>();
+        particles.Stop(true, ParticleSystemStopBehavior.StopEmittingAndClear);
+
+        var main = particles.main;
+        main.playOnAwake = false;
+        main.duration = deathEffectDuration;
+        main.startLifetime = new ParticleSystem.MinMaxCurve(0.9f, deathEffectDuration);
+        main.startSpeed = new ParticleSystem.MinMaxCurve(0.05f, 0.18f);
+        main.startSize = new ParticleSystem.MinMaxCurve(0.09f, 0.2f);
+        main.startRotation3D = true;
+        main.startRotationX = new ParticleSystem.MinMaxCurve(0f, 6.28f);
+        main.startRotationY = new ParticleSystem.MinMaxCurve(0f, 6.28f);
+        main.startRotationZ = new ParticleSystem.MinMaxCurve(0f, 6.28f);
+        main.startColor = deathEffectColor;
+        main.maxParticles = 32;
+        main.gravityModifier = new ParticleSystem.MinMaxCurve(1.6f);
+        main.simulationSpace = ParticleSystemSimulationSpace.World;
+        main.stopAction = ParticleSystemStopAction.None;
+
+        var emission = particles.emission;
+        emission.rateOverTime = 0f;
+        emission.SetBursts(new[] { new ParticleSystem.Burst(0f, 18) });
+
+        var shape = particles.shape;
+        shape.shapeType = ParticleSystemShapeType.Sphere;
+        shape.radius = 0.12f;
+
+        // 只保留轻微水平散落，主要依靠重力向下坠落。
+        var velocity = particles.velocityOverLifetime;
+        velocity.enabled = true;
+        velocity.space = ParticleSystemSimulationSpace.World;
+        velocity.x = new ParticleSystem.MinMaxCurve(-0.08f, 0.08f);
+        velocity.y = new ParticleSystem.MinMaxCurve(-0.25f, -0.05f);
+        velocity.z = new ParticleSystem.MinMaxCurve(-0.08f, 0.08f);
+
+        var collision = particles.collision;
+        collision.enabled = true;
+        collision.type = ParticleSystemCollisionType.World;
+        collision.mode = ParticleSystemCollisionMode.Collision3D;
+        collision.bounce = 0f;
+        collision.lifetimeLoss = 0.15f;
+
+        var size = particles.sizeOverLifetime;
+        size.enabled = true;
+        AnimationCurve fade = new AnimationCurve(
+            new Keyframe(0f, 1f),
+            new Keyframe(0.75f, 1f),
+            new Keyframe(1f, 0f));
+        size.size = new ParticleSystem.MinMaxCurve(1f, fade);
+
+        var renderer = effect.GetComponent<ParticleSystemRenderer>();
+        renderer.renderMode = ParticleSystemRenderMode.Mesh;
+        renderer.mesh = CreateCrystalMesh();
+        renderer.material = CreateParticleMaterial();
+        particles.Play();
+        return effect;
+    }
+
+    // 创建低模菱形水晶碎片 Mesh。
+    private Mesh CreateCrystalMesh()
+    {
+        Mesh mesh = new Mesh { name = "DeathCrystal" };
+        mesh.vertices = new[]
+        {
+            new Vector3(0f, 0.5f, 0f), new Vector3(0.5f, 0f, 0f),
+            new Vector3(0f, 0f, 0.5f), new Vector3(-0.5f, 0f, 0f),
+            new Vector3(0f, 0f, -0.5f), new Vector3(0f, -0.5f, 0f)
+        };
+        mesh.triangles = new[]
+        {
+            0, 1, 2, 0, 2, 3, 0, 3, 4, 0, 4, 1,
+            5, 2, 1, 5, 3, 2, 5, 4, 3, 5, 1, 4
+        };
+        mesh.RecalculateNormals();
+        mesh.RecalculateBounds();
+        return mesh;
+    }
+
+    // 创建带浅蓝发光效果的水晶材质。
+    private Material CreateParticleMaterial()
+    {
+        Shader shader = Shader.Find("Standard");
+        Material material = new Material(shader);
+        material.color = deathEffectColor;
+        material.SetFloat("_Metallic", 0.15f);
+        material.SetFloat("_Glossiness", 0.85f);
+        material.SetColor("_EmissionColor", deathEffectColor * 1.6f);
+        material.EnableKeyword("_EMISSION");
+        return material;
+    }
+
     // 根据单位模型或碰撞体计算血条位置和宽度。
     private void CalculateLayout()
     {