dsh-ui-thinking-title: Display DSH concurrent session status in browser tab title

`dsh-ui-thinking-title` is a plugin for the DeepSeek Harness (DSH) web client, designed to address the difficulty of distinguishing browser tab states when multiple sessions run in parallel. The plugin appends the status emoji of each session to the beginning of the tab title in real-time, allowing users to view the status without entering the session: when the Chain of Thought is being streamed, it matches specific emojis based on the trailing content; it displays ⚙️ during tool execution; and shows the default 🤔 when the Chain of Thought is unavailable. The plugin supports independent processing for multiple sessions and provides a settings page to adjust parameters such as enable/disable status, custom emojis, suffix length, and detection frequency. It also supports configuration import/export and automatic updates of the default matching table. It has no third-party runtime dependencies and can be automatically detected and loaded by the DSH client. Installation methods include runtime injection (without requiring a restart) or loading into the profile.