[Feature]: 为policy增加清除失效和手动删除的功能

## Summary

2.0版本安全审批增加了总是允许，但是无撤销允许的功能，根据观察规则存储在policy.yaml 里，是否增加web的安全界面的关于规则的编辑与删除

## Component(s) Affected

- [ ] Core / Backend (app, agents, config, providers, utils, local_models)
- [x] Console (frontend web UI)
- [ ] Channels (DingTalk, Feishu, QQ, Discord, iMessage, etc.)
- [ ] Skills
- [ ] CLI
- [ ] Documentation (website)
- [ ] Tests
- [ ] CI/CD
- [ ] Scripts / Deploy

## Problem / Motivation

解决长期使用，大量规则堆积或者错误允许，以及会话删除后不需要的规则依旧存在的问题

## Proposed Solution

在安全界面增加总是允许的规则的删除/编辑/删除失效

## Willing to Contribute

- [ ] I am willing to open a PR for this feature (after discussion).