feat: 实现定时任务系统

- 新增 platform_scheduled_tasks, platform_task_logs, platform_script_vars, platform_secrets 数据库表
- 实现 ScriptSDK 提供 AI/通知/DB/HTTP/变量存储/参数获取等功能
- 实现安全的脚本执行器，支持沙箱环境和禁止危险操作
- 实现 APScheduler 调度服务，支持简单时间点和 CRON 表达式
- 新增定时任务 API 路由，包含 CRUD、执行、日志、密钥管理
- 新增定时任务前端页面，支持脚本编辑、测试运行、日志查看

backend/app/routers/tenant_apps.py

@@ -17,13 +17,6 @@ router = APIRouter(prefix="/tenant-apps", tags=["应用配置"])
 
 # Schemas
 
-class CustomConfigItem(BaseModel):
-    """自定义配置项"""
-    key: str  # 配置键
-    value: str  # 配置值
-    remark: Optional[str] = None  # 备注说明
-
-
 class TenantAppCreate(BaseModel):
     tenant_id: str
     app_code: str = "tools"
@@ -32,7 +25,6 @@ class TenantAppCreate(BaseModel):
     access_token: Optional[str] = None  # 如果不传则自动生成
     allowed_origins: Optional[List[str]] = None
     allowed_tools: Optional[List[str]] = None
-    custom_configs: Optional[List[CustomConfigItem]] = None  # 自定义配置
 
 
 class TenantAppUpdate(BaseModel):
@@ -41,7 +33,6 @@ class TenantAppUpdate(BaseModel):
     access_token: Optional[str] = None
     allowed_origins: Optional[List[str]] = None
     allowed_tools: Optional[List[str]] = None
-    custom_configs: Optional[List[CustomConfigItem]] = None  # 自定义配置
     status: Optional[int] = None
 
 
@@ -120,7 +111,6 @@ async def create_tenant_app(
         access_token=access_token,
         allowed_origins=json.dumps(data.allowed_origins) if data.allowed_origins else None,
         allowed_tools=json.dumps(data.allowed_tools) if data.allowed_tools else None,
-        custom_configs=json.dumps([c.model_dump() for c in data.custom_configs], ensure_ascii=False) if data.custom_configs else None,
         status=1
     )
     db.add(app)
@@ -149,14 +139,6 @@ async def update_tenant_app(
         update_data['allowed_origins'] = json.dumps(update_data['allowed_origins']) if update_data['allowed_origins'] else None
     if 'allowed_tools' in update_data:
         update_data['allowed_tools'] = json.dumps(update_data['allowed_tools']) if update_data['allowed_tools'] else None
-    if 'custom_configs' in update_data:
-        if update_data['custom_configs']:
-            update_data['custom_configs'] = json.dumps(
-                [c.model_dump() if hasattr(c, 'model_dump') else c for c in update_data['custom_configs']], 
-                ensure_ascii=False
-            )
-        else:
-            update_data['custom_configs'] = None
     
     for key, value in update_data.items():
         setattr(app, key, value)
@@ -182,27 +164,6 @@ async def delete_tenant_app(
     return {"success": True}
 
 
-@router.get("/{app_id}/token")
-async def get_token(
-    app_id: int,
-    user: User = Depends(require_operator),
-    db: Session = Depends(get_db)
-):
-    """获取真实的 access_token（仅管理员可用）"""
-    app = db.query(TenantApp).filter(TenantApp.id == app_id).first()
-    if not app:
-        raise HTTPException(status_code=404, detail="应用配置不存在")
-    
-    # 获取应用的 base_url
-    app_info = db.query(App).filter(App.app_code == app.app_code).first()
-    base_url = app_info.base_url if app_info else ""
-    
-    return {
-        "access_token": app.access_token,
-        "base_url": base_url
-    }
-
-
 @router.post("/{app_id}/regenerate-token")
 async def regenerate_token(
     app_id: int,
@@ -246,7 +207,6 @@ def format_tenant_app(app: TenantApp, mask_secret: bool = True, db: Session = No
         "access_token": "******" if mask_secret and app.access_token else app.access_token,
         "allowed_origins": json.loads(app.allowed_origins) if app.allowed_origins else [],
         "allowed_tools": json.loads(app.allowed_tools) if app.allowed_tools else [],
-        "custom_configs": json.loads(app.custom_configs) if app.custom_configs else [],
         "status": app.status,
         "created_at": app.created_at,
         "updated_at": app.updated_at