Fetches trending topics from various online platforms using the Model Context Protocol (MCP).
This server-side tool implements the Model Context Protocol (MCP) to retrieve trending topics from various online platforms. It currently supports fetching hot topics from Sina Weibo and Zhihu. The project structure is designed to be easily extensible, allowing developers to add support for new platforms by inheriting from the `HotTopicBase` class and implementing the `get_hot_topics` method. The platform name is registered using the `@register_hot_topic` decorator.