fix(scaffold): 碰撞体底部对齐 y=0(原点=脚底) 修正 NavAgent 有效位置 + 追击改回nav

根因: NavAgent 用 transform 原点(0,0)判定是否在导航段上,而脚手架 CreateBodyCollider
未设 offset(碰撞体居中,底部在-size.y/2),站到地面时原点悬在导航线上方→HasValidPosition=False。
修复: AlignColliderBottomToPivot 让所有身体/HurtBox/HitBox 碰撞体底部对齐 y=0(通用规则,
角色/敌人/Boss 同理);同步修 E001 prefab 碰撞体 offset。验证: 敌人落地后 navValid=True(自动)。
追击能力改回 nav 寻路(MoveTo),不再直接移动。

注: 导航路径"跟随"仍有既有集成问题(UpdatePath 后 agent 不跟随可达路径),需另行排查。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Assets/_Game/Prefabs/Enemies/E001/ENM_CaoZhi.prefab

@@ -259,7 +259,7 @@ BoxCollider2D:
   m_IsTrigger: 0
   m_UsedByEffector: 0
   m_UsedByComposite: 0
-  m_Offset: {x: 0, y: 0}
+  m_Offset: {x: 0, y: 0.4}
   m_SpriteTilingProperty:
     border: {x: 0, y: 0, z: 0, w: 0}
     pivot: {x: 0, y: 0}
@@ -647,7 +647,7 @@ CircleCollider2D:
   m_IsTrigger: 1
   m_UsedByEffector: 0
   m_UsedByComposite: 0
-  m_Offset: {x: 0, y: 0}
+  m_Offset: {x: 0, y: 0.4}
   serializedVersion: 2
   m_Radius: 0.4
 --- !u!114 &8468978500168207169
@@ -751,7 +751,7 @@ CapsuleCollider2D:
   m_IsTrigger: 1
   m_UsedByEffector: 0
   m_UsedByComposite: 0
-  m_Offset: {x: 0, y: 0}
+  m_Offset: {x: 0, y: 0.375}
   m_Size: {x: 0.55, y: 0.75}
   m_Direction: 0
 --- !u!114 &7843048500329562790

Assets/_Game/Scripts/Editor/Scene/SceneObjectPlacerTool.cs

@@ -473,6 +473,7 @@ namespace BaseGames.Editor
             CapsuleCollider2D hurtCap = GetOrAddComponent<CapsuleCollider2D>(hurtBoxT.gameObject);
             hurtCap.isTrigger = true;
             hurtCap.size = new Vector2(0.55f, 0.75f);
+            AlignColliderBottomToPivot(hurtCap); // 底部对齐 y=0
             HurtBox hurtBox = GetOrAddComponent<HurtBox>(hurtBoxT.gameObject);
 
             Transform contactT = GetOrCreateChild(go.transform, "ContactDamageZone");
@@ -480,6 +481,7 @@ namespace BaseGames.Editor
             CircleCollider2D contactCol = GetOrAddComponent<CircleCollider2D>(contactT.gameObject);
             contactCol.isTrigger = true;
             contactCol.radius = 0.4f;
+            AlignColliderBottomToPivot(contactCol); // 底部对齐 y=0
             HitBox contactHitBox = GetOrAddComponent<HitBox>(contactT.gameObject);
             BodyContactDamage bodyContact = GetOrAddComponent<BodyContactDamage>(contactT.gameObject);
             bodyContact.enabled = false; // 伪装/待机期不伤人；由 e001_chase 能力在追击期开启
@@ -2189,20 +2191,47 @@ namespace BaseGames.Editor
 
         private static Collider2D CreateBodyCollider(GameObject go, EnemyBodyColliderType type, Vector2 size)
         {
+            Collider2D col;
             switch (type)
             {
                 case EnemyBodyColliderType.Capsule:
                     var cap = GetOrAddComponent<CapsuleCollider2D>(go);
                     cap.size = size;
-                    return cap;
+                    col = cap;
+                    break;
                 case EnemyBodyColliderType.Circle:
                     var cir = GetOrAddComponent<CircleCollider2D>(go);
                     cir.radius = Mathf.Min(size.x, size.y) * 0.5f;
-                    return cir;
+                    col = cir;
+                    break;
                 default: // Box
                     var box = GetOrAddComponent<BoxCollider2D>(go);
                     box.size = size;
-                    return box;
+                    col = box;
+                    break;
+            }
+            AlignColliderBottomToPivot(col); // 底部对齐 y=0：原点=脚底，供 NavAgent 检测原点落在导航线上
+            return col;
+        }
+
+        /// <summary>
+        /// 把碰撞体底部对齐到 transform 原点(y=0)——原点即脚底。
+        /// PathBerserker2d NavAgent 用 transform 原点(0,0)判定是否在导航段上，故所有创建物的碰撞体底部须在 y=0，
+        /// 否则站到地面时原点悬在导航线上方，导致 HasValidPosition=False、寻路失效。
+        /// </summary>
+        private static void AlignColliderBottomToPivot(Collider2D col)
+        {
+            switch (col)
+            {
+                case CapsuleCollider2D cap:
+                    cap.offset = new Vector2(cap.offset.x, cap.size.y * 0.5f);
+                    break;
+                case BoxCollider2D box:
+                    box.offset = new Vector2(box.offset.x, box.size.y * 0.5f);
+                    break;
+                case CircleCollider2D cir:
+                    cir.offset = new Vector2(cir.offset.x, cir.radius);
+                    break;
             }
         }
 

Assets/_Game/Scripts/Enemies/Abilities/ContactChaseAbility.cs

@@ -30,12 +30,10 @@ namespace BaseGames.Enemies.Abilities
                 _contactDamage.enabled = true;
 
             // 追击直到玩家消失或被 AI 中断（退出追击的决策归 AI，见 EnemyBrainContext.InterruptAbilities）。
-            // 地面爬行怪用直接水平爬行追击（朝玩家方向），不依赖 A* 寻路。
+            // 小怪走 nav 寻路（EnemyBase.MoveTo → 导航），寻路正确性依赖脚手架把碰撞体底部对齐 y=0。
-            float runSpeed = _enemy.Stats != null ? _enemy.Stats.RunSpeed : 0f;
             while (_enemy.PlayerTransform != null)
             {
-                float dir = _enemy.PlayerTransform.position.x >= _enemy.transform.position.x ? 1f : -1f;
+                _enemy.MoveTo(_enemy.PlayerTransform.position);
-                _enemy.MoveInDirectionWithSpeed(dir, runSpeed);
                 yield return null;
             }