chore: initial commit

Assets/Scripts/Enemies/EnemyMovement.cs

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+using UnityEngine;
+
+namespace BaseGames.Enemies
+{
+    /// <summary>
+    /// 敌人移动组件（架构 07_EnemyModule §3）。
+    /// Phase 1 实现：水平移动、面向目标、击退。
+    /// ⚠️ 使用 Rigidbody2D.velocity（Unity 2022 LTS）。
+    /// </summary>
+    [RequireComponent(typeof(Rigidbody2D))]
+    public class EnemyMovement : MonoBehaviour
+    {
+        [SerializeField] private EnemyStatsSO _config;
+
+        private Rigidbody2D _rb;
+        private int _facingDir = 1;
+
+        public bool IsGrounded { get; private set; }
+
+        private void Awake()
+        {
+            _rb = GetComponent<Rigidbody2D>();
+        }
+
+        /// <summary>按 SO 配置速度水平移动。dir: +1 右 / -1 左 / 0 停止。</summary>
+        public void MoveHorizontal(float dir)
+        {
+            if (_config == null) return;
+            float speed = _config.WalkSpeed;
+            _rb.velocity = new Vector2(dir * speed, _rb.velocity.y);
+            UpdateFacing(dir);
+        }
+
+        /// <summary>显式指定速度（BD 追击任务调用）。</summary>
+        public void MoveWithSpeed(float dir, float speed)
+        {
+            _rb.velocity = new Vector2(dir * speed, _rb.velocity.y);
+            UpdateFacing(dir);
+        }
+
+        public void FaceTarget(Vector2 targetPos)
+        {
+            float dir = targetPos.x < transform.position.x ? -1f : 1f;
+            UpdateFacing(dir);
+        }
+
+        public void ApplyKnockback(Vector2 dir, float force)
+        {
+            _rb.velocity = dir.normalized * force;
+        }
+
+        public void StopHorizontal()
+        {
+            _rb.velocity = new Vector2(0f, _rb.velocity.y);
+        }
+
+        private void UpdateFacing(float dir)
+        {
+            if (Mathf.Approximately(dir, 0f)) return;
+            int newDir = dir > 0f ? 1 : -1;
+            if (newDir == _facingDir) return;
+            _facingDir = newDir;
+            Vector3 s = transform.localScale;
+            transform.localScale = new Vector3(Mathf.Abs(s.x) * newDir, s.y, s.z);
+        }
+    }
+}