dsh-x9-talkjump: DSH Web Right-Side Conversation Jump Plugin

`dsh-x9-talkjump` is a DSH Web profile plugin designed to improve the efficiency of locating questions in long conversations. It provides a vertical line navigation on the right side of the page, allowing users to view a question list on hover, jump to and highlight a specific question with one click, see the corresponding line highlighted in real time based on reading progress, and automatically load previously hidden historical messages. It is easy to install, has zero runtime dependencies, and features a clean interface, significantly improving the efficiency of reviewing context in long conversations.