Merge pull request 'fix(cli): use json mode for model_dump serialization' (#33) from fix/crawler-proxy-config into main

Reviewed-on: http://192.168.1.22:8418/starmen1265/kb-skills/pulls/33

kb_workflow/cli.py

@@ -165,7 +165,7 @@ def login_command(
         result = login.login_by_qrcode()
         if result.success and result.cookie_str:
             manager.save_cookie(result.cookie_str)
-        return result.model_dump()
+        return result.model_dump(mode='json')
 
     except Exception as e:
         return {"success": False, "error": str(e)}