fix: skill loading

agent/memory/skill_loader.py

@@ -383,8 +383,8 @@ def load_skills_from_dir(skills_dir: Optional[str] = None) -> List[Skill]:
     """
     all_skills = []
 
-    # 1. 加载内置 skills（agent/skills/）
-    builtin_skills_dir = Path(__file__).parent.parent / "skills"
+    # 1. 加载内置 skills（agent/memory/skills/）
+    builtin_skills_dir = Path(__file__).parent / "skills"
     if builtin_skills_dir.exists():
         loader = SkillLoader(str(builtin_skills_dir))
         builtin_skills = loader.load_all()