[Feature]: 支持小红书海外版 creator.rednote.com

### Problem Description / 问题描述

插件目前的小红书连接器点开登录是中国版的小红书，域名是 https://creator.xiaohongshu.com/，发布时打开的链接也是中国版小红书的发布页面。实际上小红书有两个 - 中国版和海外版。

### Proposed Solution / 建议的解决方案

需要支持海外版小红书 https://creator.rednote.com/

### Alternatives Considered / 考虑过的替代方案

_No response_

### Feature Type / 功能类型

New platform support / 新平台支持

### Additional Context / 补充信息

_No response_

### Implementation / 实现意愿

- [x] I'm willing to submit a PR for this feature / 我愿意为此功能提交 PR
- [x] I'd prefer to wait for community implementation / 我希望等待社区的实现

Start by locating the existing Xiaohongshu connector and the code that opens its login and publishing URLs. Update the relevant flows to support creator.rednote.com, then verify that login and publishing open the overseas site rather than creator.xiaohongshu.com.

Written by the indexing model from the issue text.