```

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/modules/feishu/service.py

@@ -3,10 +3,13 @@ from typing import Any
 from fastapi import HTTPException, status
 from sqlalchemy.orm import Session
 
+from app.core.constants import ActorValue
 from app.core.config import get_settings
+from app.modules.audit.constants import AuditAction, AuditSource
 from app.modules.audit.schemas import AuditLogCreate
 from app.modules.audit.service import AuditService
 from app.modules.feishu.client import FeishuClient
+from app.modules.feishu.constants import FeishuPayloadKey, FeishuReceiveIdType
 
 
 class FeishuService:
@@ -32,19 +35,19 @@ class FeishuService:
         self,
         text: str,
         receive_id: str | None = None,
-        receive_id_type: str = "chat_id",
-        actor: str = "system",
+        receive_id_type: str = FeishuReceiveIdType.CHAT_ID,
+        actor: str = ActorValue.SYSTEM,
     ) -> dict[str, Any]:
         result = self.client.send_text(text, receive_id, receive_id_type)
         self.audit.log(
             AuditLogCreate(
                 actor=actor,
-                source="feishu",
-                action="send_text",
+                source=AuditSource.FEISHU,
+                action=AuditAction.FEISHU_SEND_TEXT,
                 request_payload={
-                    "receive_id": receive_id,
-                    "receive_id_type": receive_id_type,
-                    "text": text,
+                    FeishuPayloadKey.RECEIVE_ID: receive_id,
+                    FeishuPayloadKey.RECEIVE_ID_TYPE: receive_id_type,
+                    FeishuPayloadKey.TEXT: text,
                 },
                 response_payload=result,
             )
@@ -55,19 +58,19 @@ class FeishuService:
         self,
         card: dict[str, Any],
         receive_id: str | None = None,
-        receive_id_type: str = "chat_id",
-        actor: str = "system",
+        receive_id_type: str = FeishuReceiveIdType.CHAT_ID,
+        actor: str = ActorValue.SYSTEM,
     ) -> dict[str, Any]:
         result = self.client.send_card(card, receive_id, receive_id_type)
         self.audit.log(
             AuditLogCreate(
                 actor=actor,
-                source="feishu",
-                action="send_card",
+                source=AuditSource.FEISHU,
+                action=AuditAction.FEISHU_SEND_CARD,
                 request_payload={
-                    "receive_id": receive_id,
-                    "receive_id_type": receive_id_type,
-                    "card": card,
+                    FeishuPayloadKey.RECEIVE_ID: receive_id,
+                    FeishuPayloadKey.RECEIVE_ID_TYPE: receive_id_type,
+                    FeishuPayloadKey.CARD: card,
                 },
                 response_payload=result,
             )
@@ -80,6 +83,12 @@ class FeishuService:
             "config": {"wide_screen_mode": True},
             "header": {"title": {"tag": "plain_text", "content": title}},
             "elements": [
-                {"tag": "div", "text": {"tag": "lark_md", "content": "\n".join(lines) or "暂无数据"}}
+                {
+                    "tag": "div",
+                    "text": {
+                        "tag": "lark_md",
+                        "content": "\n".join(lines) or "暂无数据",
+                    },
+                }
             ],
         }