```

feat(ai_agent): 完善AI适配器和服务功能

- 添加OpenClaw和Hermes健康检查接口
- 实现OpenClaw工具调用功能
- 重构AI适配器使用常量定义
- 增加AI技能系统支持
- 更新配置文件中的默认模型提供者设置

refactor(scheduler): 使用常量替换硬编码值

- 将硬编码的actor值替换为ActorValue常量
- 将receive_id_type替换为FeishuReceiveIdType枚举

refactor(audit): 统一审计日志常量使用

- 将硬编码的actor、source、risk_level等值替换为对应常量
- 更新审核服务中的状态和操作常量引用

refactor(approvals): 标准化审批模块常量使用

- 将applicant默认值替换为ActorValue.API常量
- 使用ApprovalStatus常量替代硬编码状态值
- 更新审核操作常量引用
```

app/core/config.py

@@ -3,6 +3,8 @@ from functools import lru_cache
 from pydantic import Field, field_validator
 from pydantic_settings import BaseSettings, SettingsConfigDict
 
+DEFAULT_MODEL_PROVIDER = "noop"
+
 
 class Settings(BaseSettings):
     """Runtime settings loaded from environment variables and `.env`."""
@@ -29,11 +31,16 @@ class Settings(BaseSettings):
     feishu_encrypt_key: str | None = None
     feishu_default_chat_id: str | None = None
 
-    model_provider: str = "noop"
-    openclaw_base_url: str = "http://127.0.0.1:18789"
+    model_provider: str = DEFAULT_MODEL_PROVIDER
+    openclaw_base_url: str = "http://127.0.0.1:2070"
+    openclaw_http_url: str | None = None
+    openclaw_ws_url: str | None = None
     openclaw_api_key: str | None = None
-    hermes_base_url: str = "http://127.0.0.1:8080"
+    openclaw_gateway_token: str | None = None
+    hermes_base_url: str = "http://127.0.0.1:2073/v1"
     hermes_api_key: str | None = None
+    hermes_model: str = "hermes-agent"
+    hermes_session_id: str | None = None
     direct_llm_base_url: str = "https://api.openai.com/v1"
     direct_llm_api_key: str | None = None
     direct_llm_model: str = "gpt-4.1-mini"